456 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



the egg strings is the tiny projection representing the abdomen, 

 which bears two minute papilla?, the anal laminae, each armed with 

 a small spine. The egg strings are large and straight, nearly one- 

 fourth the diameter of the free thorax, and twice the length of the 

 entire body ; the eggs also are large and there are from 36 to 40 in 

 each string. 



The first antenna? are long and cylindrical, tapering but slightly. 

 The jointing is indistinct, but there appear to be five joints, the basal 

 one the longest and thence diminishing regularly in length outwards. 

 The seta? are all gathered in a bunch at the tip of the last joint. The 

 second antenna? are stout and two-jointed, the basal joint much 

 swollen and considerably longer than the terminal one which is in 

 the form of a stout curved claw. 



The mouth-tube is short, wide, and well rounded at the end : the 

 maxilla? are in the form of minute papilla 1 , each bearing three small 

 spines. The maxillipeds are large and project quite a little beyond 

 the sides of the carapace; they are three-jointed, the basal joint long 

 and stout, the median joint the same length but much narrower, the 

 terminal joint in the form of a short and stout claw, usually much 

 curved. 



There are two pairs of swimming legs close behind the maxillipeds 

 and very similar in structure; each is biramose and the rami are two- 

 jointed with the joints the same length. The basal joint is armed 

 with a stout spine on its outer margin ; in the exopod the proximal 

 joint is cut off diagonally toward the outer corner, where it ends in a 

 long curved claw or spine, which is fully as long as the terminal 

 joint. In the first legs the distal joint ends in a bunch of four large 

 spines ; in the second legs there is but a single spine. 



The proximal joint of the endopod is unarmed, the distal joint ends 

 in a single curved spine, nearly as long as the entire appendage. 

 The ovaries occupy the entire lateral areas of the fused thorax joints: 

 each is club-shaped, the larger end being anterior and ending close 

 to the head; the posterior end tapers gradually into the short oviduct 

 that leads to the external egg-tubes. 



Total length, 1.8 mm. Length of carapace, 0.5 mm.; of fused 

 thorax segments, 1.25 mm.; of egg strings, 3.35 mm. Width of 

 carapace, 0.625 mm. ; of fused thorax segments, 1 mm. 



Color.— (preserved material) a uniform opaque white, the ovaries 

 a light gray. 



Male.— Much smaller than the female, the body nearly as wide as 

 long. Head transversely elliptical, one-fourth wider than long, the 

 anterior margin projecting slightly at the center, the posterior one 

 nearly straight. 



The grooving of the dorsal surface is similar to that in the female 

 except for the slight projections at the center of the anterior margin. 



