30G AMrniPODA normalta. 



anteriorly i^rodiiccd to u point and minutely serrated ; propodos 

 having the margins parallel, the inferior being serrated anteriorly 

 ^^^th a row of triple-pointed teeth ; dactylos short, thick, sharp, 

 and serrated upon the inner margin. First two pairs of pereio- 

 poda subcqual, longer than the gnatliopoda ; basa nut dilated ; 

 propoda longer than the carpi, and amied with short stiff spines 

 upon the flexible margin ; dactyla short. Tliird and fourth 

 pairs of perciopoda much longer than the two preceding paii's, 

 having the basa posteriorly dilated ; iscliia and carpi subequal ; 

 propoda longer than the carpi, capable of being reflexed, and 

 aimed with short stiff spines along the flexible margin. Fifth 

 pail" of pereiopoda short, scarcely reaching to the extremity of the 

 basos of the preceding pair, having the bases posteriorly dilated 

 and nearly as large as that of the preceding pair ; the other joints 

 almost rudimentary. Antepenultimate pair of pleopoda reaching 

 as far as the extremity of the ultimate pair ; rami as long as the 

 peduncle, minutely serrated on both sides : penultimate pair shorter 

 than the preceding, having the rami longer than the peduncle 

 and serrated on both sides : ultimate pair having the peduncle 

 reaching to the extremity of the rami of the preceding pair, and 

 having the rami scarcely one-fourth of the length of the peduncle, 

 short, lanceolate, smooth. Telson small, cylindrical. The colour 

 of the animal, as well as can be judged from specimens long pre- 

 served in spirits, must be very black, since it is thickly covered 

 with coarse stellate spots of black pigment. 

 Length ^^ths of an inch = " 4 lines " {Dana). 



Hah. S. Atlantic, 37° 26' S. lat., 7° 44' W. long. {B.M.). " Orange 

 Bay, Tierra del Fuego, on Fucus, Feb. 18, 1859 " {Dana). 



The description and figure are taken from specimens preserved in 

 the British Museum. 



2. Cyllopus Lucasii, n. s. (Plate L. fig. 2.) 



Cephalon slightly produced above and between the superior antennae. 

 Superior antennae tapering to a down-curved point. Inferior an- 

 tennae reaching to nearly three-foui'ths the length of the superior : 

 flagellum consisting of four articuli ; first long, second half as long, 

 third longer than first ; terminal short and pointed, fiuniished in- 

 feriorly with a few hairs. First pair of gnathopoda robust ; carpus 

 very broad, infero-anteriorly produced to one-third the length of 

 the propodos, inferior and anterior margins deeply serrated ; pro- 

 podos long-ovate, inferior margin deeply serrated ; dactylos 

 pointed, slightly curved downwards, inferior margin serrated. 



