194 



CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Fig. 56. Tanais cavolinii. 



1905. Tanais cavolinii, Richardson, Bull. U. S. Nat. Mus., 

 No. 54, p. 8. 



Body elongate, between four and five times as long as wide, 

 and constricted at the articulations of the thoracic segments. 

 Head fused with the first segment of the thorax, about as long as 

 wide at the widest point, becoming gradually narrower toward the 

 anterior end, anterior margin triangularly produced with a very 

 obtuse apex. Eyes, small, compound, situated on short peduncles 

 at the antero-lateral angles of the head. 



Antennse short, the first pair which is the longer, is subequal 

 in length to the head. First pair with first joint two-thirds as 

 long as head ; second joint half as long as first ; third joint scarcely 

 as long as the second; terminal joint minute. Second antennae 

 shorter than first pair and more slender; first joint not quite as 

 long as the third; fourth joint longer than second and about 

 one-half as long as third ; flagellum rudimentary, uniarticulate. 



Mandibles without palp. First maxillae with a single plate. 

 Maxillipeds with palp of four joints and well developed epignath. 



Second and third segments of thorax subequal in length and 

 shorter than the succeeding ones. First pair of legs cheliform, 

 very large, with propodus longer than carpus. Second pair 

 with an especially long dactyl, much longer and more slender 

 than the succeeding ones which are all ambulatory. 



Abdomen composed of five segments, of which the first three 

 are subequal in width to those of the thorax but somewhat 

 shorter, and the first is slightly longer than the two succeeding 



