OAMMAUlD.li. 95 



the inferior pair very distinct, and placed near the margin at the 

 base of the superior antonna% which are situated at the anterior 

 extremity of the cephalon, and far in advance of the inferior ; both 

 pairs of antennae are slight, the inferior longer than the superior. 

 Body much compressed ; the anterior portion, together with the 

 cephalon, somewhat carinatod ; the posterior portion slightly an- 

 gulated. Fourth segment of the plcon carinated ; sixth posteriorly 

 obtusely bidcntate. Mandibles furnished with a triarticulatc ap- 

 pendage. Maxilla) 4-articulatcd ; second joint larger than the 

 others ; third ovate ; fourth rudimentaiy, haiiy. Maxillipeds 

 having the larger foliaccous appendage upon the inner margin 

 pectinated. Gnathopoda and first three pairs of pcreiopoda having 

 the form peculiar to the genus. Posterior pair of pereiopoda having 

 the bases large, ovate, posteriorly dilated, and the inferior margin 

 ciliated ; dactylos not unguiculate, straight, thin, and flat. Pos- 

 terior pair of pleopoda ha\"ing the rami equal, lanceolate, and 

 reaching beyond the preceding. TeLson lanceolate, obtuse, cleft. 

 Coxae large. Posterior margin of the thii'd segment of the pleon 

 cun-ed, and refloxed beneath into a prominent tooth. The female 

 can be distinguished from the male by the superior antenna; being 

 slighter and shorter. Colour in both sexes wliitc and red, variegated. 

 Cephalon with eyes red, as also the pereiopoda, including the coxae. 

 " Length of the male about 20 lines, and therefore among the larger 

 of our Amphipoda. 



" Hah. Kullaberg, Norway." — Liljeborg. 



The above is taken from Liljeborg's description ; and but for the 

 carinated and bidentated characters, which he has not alluded to in 

 his description (I. c. 1855), of the fourth and sixth segments of the 

 pleon, this species would appear to be identical with A. Belliana, 

 l)articidarly in the ornate character of the posterior margin of -the 

 third segment of the pleon. 



8. Ampelisca brevicornis. 



Araneops brevicornis, Costa, Rend. del. Accad. del. Sc. di Napoli, p. 171, 

 18o3. 



" Superior antennae scarcely surpassing the penultimate joint of the 

 peduncle of the inferior, and having the iiagellum half as long 

 again as the peduncle. Inferior antennae having the last joint of 

 the peduncle distinctly longer than the preceding ; flagellum half 

 as long as the peduncle. 



" Length 5| lines. 



" Hah. Naples."— Cos^rt. 



