ISOPODA. 63 



C. Cymodoce bicarinata, Stebbing. n.s., lines indicating natural size of specimen figured above in dorsal 

 view; PI., ventral view of pleon, the pleopods removed; g., part of the gastric apparatus; a.s., a.i., 

 first and second antenna; Ls., l.i., m.rp., upper and lower lips and maxillipeds; gn, 1, prp. 5, first 

 gnathopod and fifth peraeopod ; g.p., genital papilla; from seventh person segment ; pip. 2, second 

 pleopod, with apical part of male appendix more highly magnified. 



PLATE XI. 



A. Amescptms richardscma; n. gen. et sp. n.s. ? , line indicating length of body and second antenna; of the 



female specimen figured above in lateral and below in dorsal view ; n.s. , line indicating length of 

 body of a young, probably male, specimen figured in dorsal view. C.T., a.s., a.i., cephalothorax 

 (head and first peraeon segment), with a first antenna and part of the second as far as base of fourth 

 joint; the flagellum shown separately; l.i., m., mx. 1, mx. 2, mxp., lower lip, a mandible (with part 

 more enlarged), first and second maxillae, and maxillipeds; gn. 1, gn. 2, first and second gnathopods. 

 All these details are from the female specimen, the mouth organs more highly magnified than the 

 other appendages, prp. 4 $ , pip. <$ , wrp. , fourth peraeopod, second pleopod, and uropod from a 

 male specimen 4 millims. long. The figures drawn to the same scale as that used for the limbs of 

 the female. 



B. Jsfacilla amblyura, n. sp. n.s., line indicating length of body and second antennae of the specimen 



figured in lateral view ; ft, part of head ; PL, dorsal view of pleon, showing one of the valvular 

 uropods thrown open ; a.s., a.i., first and second antenna} ; m., mx. 1, mx. 2, mxp., niandible (with 

 part more enlarged), first and second maxilla;, maxillipeds; gn, 1, gn, 2, prp. 5, first and second 

 gnathopods and fifth peraeopod, with the finger of each more enlarged ; pip. 2, urp., second pleopod 

 and uropod. 



C. Jaropsis curvicornis (NiCOLET). n.s., line indicating length of specimen figured above in dorsal view ; 



ft, dorsal view of head, with upper lip and one of the mandibles projecting in front; PL, ventral 

 view of pleon, without the pleopods ; one uropod more highly magnified ; operc, opercular plate 

 formed by the first pleopods; a.s., a.i., upper and lower antennas, with most of the lower antenna 

 more enlarged ; in., m., mx. 1, mx. 2, mxp., the mandibles, first and second maxilla;, and maxillipeds, 

 with the cutting plates of the mandibles and one palp of the maxillipeds more highly magnified ; 

 gn. 1, gn. 2, prp. 5, first and second gnathopods and fifth peraeopod, with the fingers of first 

 gnathopod and fifth peraeopod more enlarged. 



All the detail figures are enlarged to the same scale, but are accompanied in some instances by 

 parts more highly magnified. 



PLATE XII. 



A. Stenrtrinm chiltoni, n. sp. n.s., lines indicating natural size of specimen figured below in dorsal view; 

 C, a.s., a.i., dorsal view of head more enlarged, with the eyes, the first antenna of the left side, 

 part of that on the right, and parts of the second antennae, ending with the third joint on the left, 

 with the fourth on the right. PL, terminal part of pleon ; this, with the legs and pleopods, is 

 enlarged to the same scale as the preceding figure, while the mouth organs are more highly 

 magnified, and the spines of the first gnathopod still more highly. Ls., Li., upper and lower lips; 

 in., in., mx. 1, mx. 2, mxp., <>p., mandibles, first and second maxilla?, maxillipeds, with one epipod 

 detached; gn. 1, gn. 2, prp. 1, first gnathopod, with some of the spines of the palm and finger very 

 highly magnified ; second gnathopod ; first peraeopod ; pip. 1, 3, 4, 5, the first, third, fourth and fifth 

 pleopods ; a.i'., second antenna from a different specimen, to which the following parts also belong ; 



