2 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
Africa, Natal, islands of the Malay Archipelago, Thailand, China, 
Burma, India, Kashmir, Australia, and New Zealand. That his 
leeches originated from such widely scattered points of the world 
attests to Moore’s standing as a hirudinologist. 
Moore’s technical papers are devoted largely, although not ex- 
clusively, to leeches—their anatomy, both external and internal, 
and their ecology. His chapters on the Hirudinea in Ward and 
Whipple’s ‘Freshwater Biology” (1918, 1959a), attest to his skill in 
analyzing, synthesizing, and evaluating the work of himself and others. 
In contrast to the work of his American predecessors, whose tax- 
onomy was based only upon external characters, which themselves 
are ephemeral in animals known for their changeableness, Moore’s 
descriptions were based upon dissections or serial sections, or both, 
and were characterized by equally detailed accounts of both the 
external and internal anatomy. In preparing the chapter on Hirudinea 
for the second edition of Ward and Whipple, he encountered so many 
contradictions in the diagnoses of named species that he found it 
necessary to reexamine Verrill’s available “types” and study living 
specimens from the type-localities (Moore, 1952b). When he found it 
necessary to disagree with or to criticize work that did not seem well 
erounded, he always managed to do it courteously. 
While Moore’s contribution to the systematics of leeches deserves 
special mention, he will be most remembered for his earlier work on 
the leech neuro-segment theory and his method of expressing segment- 
annular relationships, a method still in current use. This theory, in 
character with his other writings, reflects his sound judgments. In the 
light of present day specialization, his versatility is amazing. It enabled 
him to produce important contributions on polychaetes and oligo- 
chaetes and to achieve a position of world leadership on leeches. 
Moore spent a sabbatical year (1930-1931) trekking through India 
studying firsthand the land leeches, after which he published a paper 
(1932b), correcting or modifying certain statements made in his 
account of the Haemadipsidae in the Hirudinea volume of “The Fauna 
of British India” series (1927). In a 1 March 1931 letter from Calcutta, 
according to Wenrich (1965, p. 195), Moore stated, among other things: 
Over here I have acquired a most evil reputation, for wherever I go I am known as 
the Professor who studies land leeches, which is generally regarded as the acme of 
American eccentricity; and in a country where Al Capone, Jack Dempsey and 
Charlie Chaplin are regarded as the greatest and most representative Americans, 
that is saying a good deal. 
Moore was a modest person, a gracious host with a keen sense of 
humor. His conversation was spiced with witticisms. I cannot speak too 
highly of his orderly, constructive mind and his analytical powers. He 
was a person who did not think in absolutes, and was able to be ob- 
