264 



PROCEEDINGS OF THE ACADEMY OF 



[Apr., 



Doras hancocki Valencienes. 



One example 76 mm. long. 

 Leptodoras linnelli Eigenmann. 



One example 165 mm. 

 Leptodoras trimaculatus sp. nov. Fig. u. 



Head 3|; depth 4J; D. I, 6; A. iv, 9; P. 



I, 7; V. I, 6; head width 



1 3 in its length; head depth at occiput 1^; snout 2f; eye 2f ; inter- 

 orbital 4^; dorsal spine 1; ventral If; first branched anal ray about 

 2|; upper caudal lobe 1^; least depth of caudal peduncle 4g. 



Body well compressed, moderately long, deepest at dorsal origin, 

 edges all convex, though predorsal slopes up each side to median 



--^. --^' . * -»** ^ .^ ^ * > ..^^ * * _JL -^^fc-->l^^' J— ¥ i^ -^ ^ ^ ^'ll^ T— -■— -^7~*' 



Fig. 14. — Leptodoras trimaculatus Fowler. (Tj^je.) 



constricted edge. Caudal peduncle wider than deep, least depth 

 about half its length. 



Head large, well compressed, elevated, upper profile convex, 

 curves down rather steeply in front. Snout conic, basal width about 

 I its lengih, upper profile concave-convex. Eye large, ellipsoid, 

 high, and centre slightly posterior in head length. Eyelid not free, 

 continuous with skin of head as adipose-eyelid. Mouth small, 

 anteriorly inferior. No teeth. Lips rather thick, flesh3\ Max- 

 illary barbel reaches slightly beyond pectoral origin, fleshy, and its 

 outer edge fringed with cirri. Mandible with cluster of four thick 

 papillose fleshy barbels hanging down, length of each about f of 

 eye. Tongue fleshy, little distinct. Nostrils simple pores, anterior 



