CUMACKA. If,*) 



The first legs (fig. 45) are very short, just reaching to the antennal angle of the 

 rat apace when extended forwards. The basis is about equal, in length to the 

 succeeding segments together. 



The second leg (fig. 47) exhibits the full number of segments; it is short and 

 stout, and its terminal segment is armed with three spines. The third legs are 

 longer than the second, and the fourth and fifth successively diminish in length by 

 shortening of the basis (figs. 49 to 51). The propodus and dactylus of these limbs 

 are rather slender. 



The uropods (fig. 52) are short and stout ; the peduncle is about equal to the 

 terminal somite in length and finely serrate on its inner margin. The rami are sub- 

 equal and a little shorter than the peduncle. Each is tipped by a stout spine. The 

 exopod is otherwise unarmed except for a small spinule implanted external to the 

 base of the large spine. The endopod has a single spine on its inner edge near the 

 distal end. 



In addition to scattered pigment spots on the carapace and free thoracic somites, 

 there is a more or less well-marked pigmentation of the first two and the last abdo- 

 minal somites. 



Adult Male. Total length, 3'9 millims. (fig. 41) : 



The carapace is less deep than in the female, with the dorsal outline less arched. 

 The pseudorostrum is shorter and truncated, the plates meeting for only a short 

 distance in front of the ocular lobe. The latter is large, inflated, with large and 

 distinct corneal lenses. On the upper part of the side of the carapace the longitudinal 

 ridges only occupy the posterior third, stopping short at a vertical ridge in front of 

 which the surface is irregularly granulated. 



The first leg-bearing somite is exposed dorsally and the second is not distinctly 

 crested. The posterior thoracic somites are broad and depressed, with prominent 

 dbrso-lateral corners. The abdomen is remarkably stout, a little longer than the 

 cephalothoracic region, the anterior somites broader and deeper than long, the fifth 

 somite narrowing suddenly about the middle of its length. 



The various appendages, so far as seen without dissection, resemble closely those of 

 the female. The basis of the first leg (fig. 46) bears on its inner edge a series of four 

 stout spines. 



The basis of the second leg (fig. 48) has its anterior edge cut into a series of fine 

 recurved teeth not observed in the female. 



The uropods (fig. 53) are shorter than in the female. The peduncle is shorter than 

 the terminal somite and bears a series of long plumose hairs on its inner edge. The 

 rami are broad and flattened. The endopod has a series of serrate spines on its inner 

 edge increasing in length distally, the two distal spines close to the stout apical one 

 and separated by a little interval from the others ; the outer edge and the distal part 

 of the inner edge are serrate. The exopod has several plumose hairs on its inner 

 edge. 



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