UNITED
STATES SECURITIES AND
EXCHANGE COMMISSION
Washington, D.
C. 20549
SCHEDULE 13
G
(Rule 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS
FILED PURSUANT
TO RULES 13d-1(b),(c), AND (d) AND AMENDMENTS
THERETO FILED PURSUANT TO RULE
13d-2(b)
Amendment No. __1__
PSYCHEMEDICS CORPORATION
Name of Issuer
____________COMMON__________
Title of Class of Securities
__________744375106___________
CUSIP Number
________January 1, 1999__________
Date of Event Which Requires Filing of This
Statement
Check the appropriate box to designate the rule
pursuant to which this Schedule is filed:
[ ] Rule 13d-1(b) [X] Rule 13d-1(c)
[ ] Rule 13d-1(d)
CUSIP NO. 744375106 13G
Page 1 of
4
1. NAMES OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE
PERSON (ENTITIES ONLY)
Richard T. Christoph,
Richard T. Christoph IRA, Ann B.
Christoph IRA, and
Richard T. Christoph, Trustee of the Carla
C.
McMahan Trust
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A
GROUP* [a]
[X]
[b] [ ]
3. SEC USE ONLY
4. CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen
NUMBER OF 5. SOLE VOTING POWER
SHARES
1,400,250
BENEFICIALLY 6. SHARED
VOTING POWER
OWNED BY
- -0-
EACH 7. SOLE
DISPOSITIVE POWER
REPORTING
1,400,250
PERSON 8. SHARED DISPOSITIVE POWER
WITH -0-
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY
EACH REPORTING
PERSON
1,400,250 as of February 1, 1999
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW
(9) EXCLUDES CERTAIN
SHARES*
[ ]
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN
ROW 9
6.34% of 22,146,398 shares
outstanding as of November 3, 1998
12. TYPE OF REPORTING PERSON*
IN
CUSIP NO. 744375106 13G
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Item 1(a) Name of Issuer:
Psychemedics Corporation
Item 1(b) Address:
1280 Massachusetts Ave.
Cambridge, MA 02138
Item 2(a) Name of Person Filing:
Richard T. Christoph, Richard T.
Christoph IRA, Ann B. Christoph IRA,
and
Richard T. Christoph, Trustee of the Carla
C.
McMahan Trust
Item 2(b) Address:
1156 Lynette Drive
Lake Forest, Illinois 60045
Item 2(c) Citizenship:
U.S. Citizen
Item 2(d) Title of Class of Securities:
Common
Item 2(e) CUSIP Number:
744375106
Item 3.If This Statement is Filed Pursuant to
Rule 13d1(b), or 13d-2(b) or (c),
Check Whether the Person Filing is a:
(a) [ ] Broker or dealer registered
under Section
15 of the Exchange Act.
(b) [ ] Bank as defined in Section 3(a)
(6) of the Exchange Act.
(c) [ ] Insurance company as
defined in Section 3 (a) (19) of the
Exchange Act.
(d) [ ] Investment company
registered under Section 8 of the
Investment Company Act.
(e) [ ] An investment adviser in
accordance with Rule 13d-1 (b) (1) (ii)
(E);
(f) [ ] An employee benefit plan or
endowment fund in accordance with
Rule 13d-1 (b) (1) (ii) (F);
(g) [ ] A parent holding company or
control person in accordance with
Rule 13d-1 (b) (1) (ii) (G);
CUSIP NO. 744375106 13G
Page 3 of 4
(h) [ ] A savings association as
defined in Section 3(b) of the
Federal Deposit Insurance Act;
(i) [ ] A church plan that is
excluded from the definition of
an investment company under
Section 3(c) (14) of the Investment
Company Act;
(j) [ ] Group, in accordance with
Rule 13d-1 (b) (1) (ii) (J).
If this statement is filed pursuant to
Rule 13d-1 (c), check this box. [X]
Item 4. Ownership.
Provide the following information
regarding the aggregate number and percentage of
the class of securities of the issuer identified
in Item 1.
(a)Amount beneficially owned:
______1,400,250__________________________
___________ _______________
(b)Percent of class:
______6.34% of 22,146,398 shares
outstanding as
of November 3, 1998_________
(c)Number of shares as to which such person has:
(i)Sole power to vote or to direct the vote
_______1,400,250__________
(ii) Shared power to vote or to direct the vote
________-0-_____________
(iii) Sole power to dispose or to direct the
disposition of ___1,400,250____
(iv) Shared power to dispose or to direct the
disposition of _____-0-______
Item 5 Ownership of Five Percent or Less
of a Class:
N/A
Item 6 Ownership of More than Five
Percent on Behalf
of Another Person: N/A
Item 7 Identification and
Classification of N/A
the Subsidiary which Acquired the
Security Being Reported on the
Parent Holding Company:
Item 8 Identification and
Classification of Members
of the Group: N/A
Item 9 Notice of Dissolution
of Group:
N/A
CUSIP NO. 744375106 13G
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Item 10 Certification:
By signing below, I certify that, to
the best of my knowledge and belief,
the securities referred to above
were not acquired and are not held
for the purpose of or with the effect
of changing or influencing the
control of the issuer of such
securities and were not acquired and
are not held in connection with or
as a participant in any transaction
having that purpose or effect.
After reasonable inquiry and to the
best of my knowledge and belief,
I certify that the information
set forth in this statement is true,
complete and correct.
Date: February 5, 1999
Signature:___/S/ Richard T. Christoph___
Name/Title: Richard T. Christoph,
Individually, and on
behalf of the Richard T.
Christoph IRA, and
as Trustee of the Carla
C. McMahon Trust.
Date: February 5, 1999
Signature:_/S/.Ann B. Christoph_
Name/Title: Ann B. Christoph, on
behalf of the Ann B.
Christoph IRA
