ISOPODA. 59 



EXPLANATION OF PLATES. 

 PLATE I. 



A. Heierolanais crassicomis, n. sp. n.s., natural size of specimen figured in lateral and in dorsal view; 



a.s., a.i., upper and lower antennae more highly magnified ; gn. 1, gn. 2, first and second gnathopods ; 

 prp. 1, prp. 3, first and third peraeopods; urp., uropod. 



All the details are to the same scale, except the separate thumb and finger of gn. 1, and the 

 separate outer branch of the uropod, which are more magnified than the other parts. 



B. Leptochclia mirabilis, n. sp. A.n.s., natural size of specimen figured in dorso-lateral view, with first 



gnathopod of the right side supplied from fragments; gn. 1, part of first gnathopod of the left side, 

 probably belonging to the above specimen and drawn to the same scale; a.s., a.i., third joint of 

 peduncle and the flagellum of upper antenna, and the lower antenna these and the following details 

 on a higher scale of magnification ; gn. 2, prp. 5, second gnathopod and part of fifth peraeopod ; pip., 

 urp., one of the pleopods and a uropod ; B.n.s., natural size of specimen figured in dorsal view, 

 showing lower antennae and base of right upper antenna ; uropods broken. 



C. Leptochclia lifuensis. a.s. ? , a.i. $ , upper and lower antennae of female; gn. 1, ? , gn. 2, $ , first and 



second gnathopods of female; urp. ?, uropod of female; a.s. J 1 , a.i. <$ , upper and lower antennae 

 of male; gn. 1, g , first gnathopod of male; urp., uropod of male. 



All the above are magnified to the same scale as the general details in Plate I., A, except the 

 separate ramus of the male uropod, which is magnified on the same scale as the corresponding 

 ramus in Plate I., A. 



D. Tanais gracilis, Heller. n.s., natural size of specimen figured in lateral and dorsal views ; a.s., a.i., 



upper and lower antennae very highly magnified ; gn. 1, gn. 2, pip. 4, first and second gnathopods 

 and fourth peraeopod ; I'L, urp., dorsal view of pleon and uropods, to the same scale as the pre- 

 ceding details ; in., mxp., mandible and maxillipeds, exopod of the latter detached and incomplete. 

 These and the separate portions of the second gnathopod and fourth peraeopod are more magnified 

 than the other details. 



PLATE II. 



A. Conilorpheus herdmani, n. gen. et sp. n.s., lines indicating natural size of specimen figured below in 



dorsal and lateral view; C, dorsal view of the head; Pa: s. 7, seventh segment of peraeon in dorsal 

 view, and in lateral view with the fifth peraeopod and pleopods showing below; PL, pleon in dorsal 

 view; a.s., a.i., first and second antennae ; m., m., mx. 1, mx. 2, mxp., the two mandibles, first and 

 second maxillae, and maxillipeds, the mandible on the right figured from the inner side; gn. 1, 

 prp. 4, pip. 5, pip. 1, pip. 2, urp., first gnathopod, fourth and fifth peraeopods, first and second 

 pleopods, and uropods, the last in ventral view. 



The mouth organs are magnified on a higher scale than the other appendages. 



B. Hansenolana sphceromiformis (Hansen). n.s., lines indicating natural size of specimen figured in dorsal 



view; PL, pleon in dorsal view; a.s., a.i., first and second antennae ; m., mx. 1, mx. 2, mxp., mandible, 

 first and second maxillae, maxillipeds; gn. 1, gn. 2, prp. 5, pip. 1, pip. 2, pip. i, urp., first and second 

 gnathopods, part of fifth peraeopod, first, second, and fourth pleopods, and uropods. Below the full 

 figure of gn. 1 from the outside is given a more enlarged figure of the other member of the pair 

 from the inner side. The portion of this gn. 1 and the portion of prp. 5 are enlarged on the same 

 scale as the mouth organs. 



I 2 



