butions to the study of echinoderms, indicated by the bibliography which 

 follows; that appraisal should be reserved for other workers in his chosen 

 field. 



My association with Dr. Clark began in 1930 when he agreed to 

 supervise my graduate studies on Crustacea. At the time, my knowledge 

 of Crustacea was extremely fragmentary, and he readily admitted his 

 ignorance of some of the more involved aspects of crustacean classification. 

 Thanks to his insistence that the best way to learn the relationships of any 

 group was by direct examination of as many of the representative forms 

 as possible, both of us eventually gained an adequate working knowledge 

 of this diverse assemblage of animals. As this form of training entailed the 

 drudgery of checking identifications, relabeling specimens, and re- 

 arranging the crustacean collections in the far reaches of the catacomb-like 

 basement of the Museum of Comparative Zoology, the assignment was 

 not consistently welcomed or understood by a young taxonomist who 

 associated systematic work with somewhat more significant tasks in a less 

 obscure environment. Not until several years later did the value of this 

 fundamental curatorial training become apparent to the recipient. I am 

 sure that Dr. Clark appreciated his student's mild discomfort, and I will 

 always be grateful that he had the courage of conviction to see to it that 

 this apprenticeship was fully served. 



In subsequent years, as a member of the staff at the Museum of 

 Comparative Zoology, I became better acquainted with Dr. Clark and 

 came to recognize his loyal friendship as one of the most important and 

 valued associations of my life. Although he was unusually reticent about 

 offering unsought criticism of any kind, he was always eager to be of 

 assistance whenever his advice was solicited. His almost emotional grati- 

 tude for all favors returned in kind was a unique characteristic familiar 

 to all who came in close contact with him. 



Except for an attack of yellow fever suffered during a collecting 

 trip to Jamaica in 1896, from which he was the only one of six victims 

 to survive, Dr. Clark enjoyed remarkably good health until his last illness. 

 Always one to minimize his infrequent minor indispositions, he sometimes 

 found it difficult to appreciate the reaction of others to similar disorders. 

 The bout with yellow fever had a profound effect upon his later life, 

 however, for it left him with impaired hearing which showed progressive 

 deterioraion with the passage of time. This affliction seemed to affect in 

 no way his optimistic outlook toward life, but it did virtually force his 

 retirement from classroom teaching, which he so enjoyed, and prevented 



ui 



