68 CAKL B()VAI,LIl!.S, AMI'Hir(lJ)A II YIMCHIIDKA. VIIUMD.K. 



Tlic second pair of antenruM (Pl. A, lig. 4 and i3) are six-joiiited, in tho young 

 iiialc, tlic tiftli joiiit is tlu; sbortest. 



'I'lic tirst segment of the jicrelon is sliortei' tlian tlic .second, tlic fifth i.s the longest. 



'riic jlfst pair of p('reiopoda (Pl. X, tig. (i and 7) havc the carpus considerably 

 shorter than the luetacarpus, tlic posterior margin vounded, avnied with two strong bristles. 

 The convex anterior margin of the metacarpus is armed with two bristles, the posterior 

 margin is straight, sei'rated. The dactylus is longer than half the metacarpus, irregularly 

 serrated along the posterior margin, jirovided with a distinct aperturc at the base as an 

 outlet for the metacarpal glands. 



The second pair (Pl. X, tig. 8—10); the carpus is shorter than the metacarpus; the 

 carpal process is very broaci and stout, longer than the carpus itself and quite as long 

 as the posterior margin of the metacarpus. The inner or anterior margins of the process 

 are irregularty serrated (Pl. X, tig. 10). The metacarpus is thick, bulging, the anterior and 

 posterior margins convex, the anterior smooth, the posterior regularly serrated. The dac- 

 tylus is shorter than half the metacarpus, serrated along the posterior margin. 



The third and fourth pairs (Pl. X, tig. 11) have the tibia and carpus equal in length; 

 the tibia is tolerably broad but not tumid, the metacarpus is longer than the carpus, the 

 posterior margin smooth. The dactylus is scarcely half as long as the metacarpus. 



The fifth and sixtli pairs (Pl. X, fig. 12 and 13) are subequal in length, a fourth 

 longer than the fourth pair. The anterior margin of the carpus and metacarpus is armed 

 with a row of ver}' short, equidistant spines. The dactylus is shorter than half the me- 

 tacarpus, armed with somc fcAv sliort spines as in Vihilia gyacilis (Pl. X, fig. 13). 



The seventh pair are considerably shorter than the fourth; the fem ur is longer than 

 the three succeeding joints together. 



The pleon is longer than the last four pereional segments. 



The second and third ural segments are coalesced, shorter than the first, and distinetl}' 

 broader than long. The hinder corners are produced into rounded processes reaching as 

 far backwards as the tip of the telson. 



The uropodd (Pl. X, fig. 14); the peduncle of the first pair is a little longer than 

 the rami, broader below, distinctly serrated along the outer margin. The interiör ramus 

 is scarcely longer than the exteriör, both are lanceolate, strongly serrated along the outer 

 margins, and coarsely at the inner. The peduncle of the second pair is as long as the 

 rami, linear, the mar2'ins smooth ; the interiör ramus is a little broader and lonjfer than 

 the exterioj', broadh' lanceolate, sti'ongiy seri-ated along both niargins; the exteriör is strongly 

 serrated along the interiör niargin and has some few coarse serrations at the outer. The 

 peduncle of the third pair is longer than the i-ami (7:5), as broad as the peduncle of 

 the preceding pair, and only a little shorter than the last ural segment. The rami are 

 equal in length, the interiör minutely serrated along both margins, the exteriör smooth 

 along the outer margin and minutely serrated along the inner. 



The telson is almost triangulär, as long as broad, and half as long as the peduncle 

 of the last pair of uropoda. 



