COPEPODS OF THE WOODS HOLE REGION 



485 



anterior terga and sterna, then narrowing gradually and becoming 

 chitinized, and flexed ventrally where it joins the trunk. First an- 

 tenna 1-segmented, rather well supplied with setae; second antenna 

 3-segmented, with a stout apical chela; proboscis cylindrical and 

 strongly protrusible; first maxilla a tiny process tipped with two 

 setae; second maxilla 3-segmented, uncinate. Total length, 22 mm. 



Male. — Unknown. 



Remarks. — This species can be recognized by the cushionlike horns, 

 each ending in a finger process, and thus far it has been found only 

 on the one host. 



5 mm. 



Figure 291. — Sarcotretes lohatus: a. Female, dorsal ; h, 

 female, first and second antennae 



Genus LERNAEOCERA Blainville, 1822 



Female. — Head fused with the first segment, globular, and armed 

 with three branched chitin horns, one dorsal and two lateral ; second, 

 third, and fourth segments fused into a slender neck, the same diam- 

 eter throughout ; fifth and genital segments and abdomen fused into 

 a swollen trunk, bent into the shape of the letter S; caudal rami 

 minute, each tipped with a single seta. Egg strings filiform, many 

 times the length of the body and irregularly coiled. First antenna 

 3-segmented and setose; second antenna 2-segmented and chelate; 

 two pairs of maxillae, no maxillipeds; first two pairs of legs bira- 

 mose, third and fourth legs uniramose, all rami 2-segmented. 



Gopepodid male. — Head fused with first segment; second, third, 

 and fourth segments free; fifth and genital segments fused; abdo- 

 men 1-segmented, caudal rami short and wide, each tipped with four 

 or five setae. First antenna 4-segmented and setose ; second antenna 

 chelate; two pairs of maxillae and a pair of stout maxillipeds; swim- 

 ming legs like those of the female. A single species in the area. 



