new Species of Cordl-infestintj Cmh. 217 



but there is no special reduction in regard to one or otlicr of 

 the last two pairs ; the dactyli are short, stout, and strongly 

 curved, with a yeUow horny apex to each. 



The sternal phistron is subpcntagonal in outline, and is 

 not si)ecially excavated mesially ; the posterior margins of 

 the sternal j)ieces opposite the penultimate pair of legs meet 

 together in the middle line, and thus isolate the small 

 triangular sternal pieces of the List pair of legs, as the latter 

 sternites do not reach the middle line. The openings of the 

 oviducts are seen towards the inner limits of the sternal 

 j)ieces belonging to the third pair of legs. 



The abdomen is semi-extended and composed of seven 

 distinct segnionts, including the tels-on, of which the first 

 five are visible from above in the natural condition ; in some 

 cases the abdomen viewed from above is almost equal in 

 length to the carapace. The first two segments arc about 

 equal in width to the posterior margin of the carapace, but 

 from the third onwards there is a gradual increase up to the 

 fifth, which is broader than the broadest part of the carapace. 

 All the seguients are smooth and semimembranous; their 

 free edges form a thin continuous membrane Avhich bounds 

 a deeply concave subabdominal cavity or brood-pouch, in 

 Avhich the eggs are placed. The eggs are o£ large size for so 

 small a species. 



The average total length of the body, including the semi- 

 extended al)domen, is about 5 '5 mm. 



Characters of the male. — The carapace is roughly four- 

 sided, with the length about one and a half times the 

 breadth ; it is regularly arched, or convex, from end to end, 

 less so from side to side, and the downward slope of the 

 convexity is most marked at the extreme anterior end. The 

 surface is glabrous and without spinules, but roughened by 

 very minute tubercles; the margins are entire, with the 

 exception of a few minute spinules near each antero-lateral 

 angle and on the edge of the frontal lobes. In some 

 individuals, though not in all, the submedian frontal lobes 

 project further forwards than the antero-lateral angles of 

 the carapace, and are somewhat closer together than in the 

 female, with the result that the orbital notches are relatively 

 wider ; the frontal notch is shallow. The posterior margin 

 of the carapace is straight in its median portion, while the 

 lateral margins of the carapace have practically the same 

 course as in the female. The lateral or protogastric portions 

 of the gastric area are slightly elevated. The arrangement 

 of the antennules, antennpe, and eyes, as seen from above, 

 is similar to that in the female, with the exception that the 

 spinules are almost obsolete on the basal antennular joints 



