PELOMYXA. 7 



VOrax. SYN. : A. villosa, Wallich; 0. vorax, Leidy; 

 0. lapsa, Leidy. 



Animal in all respects resembling A. proteus with the 

 addition of fascicles of trailing filaments. Filaments 

 cylindrical tubes, each fascicle emanating from * common 

 stalk, inarticulate, usually blunt at the ends; fascicles one 

 to half a dozen or more, mostly trailing in a single bunch. 

 Size : small form 140// long by 280 ft wide ; filaments, 40/./ 

 to ISO// long. Bare. 



0. botulicauda, Leidy. Species comparatively small, 

 colorless, transparent, angular. Pseudopods short, conical, 

 acute, rarely digitate. Caudal appendages in one or two 

 tufts, each composed of two to nine acutely divergent, 

 segmented filaments of variable length. One or two con- 

 tractile vesicles and nucleus present. This may be a young 

 form of the preceding genus. The trailing filaments are 

 usually in a single tuft, but occasionally there are two. 

 Size : ranging from 40// by 32ft to Y6// by 20ft ; caudal 

 appendages, 12 ft to 4:5 ft. 



GENUS III. PELOMYXA. 



SYN. : Pelobius, Greef ; Pelomyxa, Greef. 



Animal like Amoeba, naked, form variable ; when 

 quiescent, spheroidal or ovoidal ; in motion, more or less 

 leech-like or slug-like in shape ; differentiated into an 

 anterior and a posterior region, habitually with the 

 broader extremity in advance and progressing by the 

 projection of a wave-like expansion of clear ectosarc in 

 front or from other parts of the body ; frequently terminat- 

 ing posteriorly in a conspicuous process of clear sarcode 



