MARINE CRUSTACEANS. 721 



PLATE LII B. Gymodoce bicarinata, n. sp. (p. 712). 



n. s. Natural size of male specimen figured below in dorsal and lateral view.s. 



a. s., a. i. First and second antennae. 



I. s., /. i. Upper lip with epistome, and lower lip. 



in. 7)1., m.v. 1, mx. 2, mxp. Mandibles, first and second maxillae, and maxillipeds. 



gn. 1, prp. o, pip. 2. First gnathopod, fifth peraeopod, second pleopod. 



o. m. Male appendages of seventh peraeon segment and second pleopod, these and the mouth-organs 

 being much more highlj' magnified tiian the antennae, limbs, and pleon. 



PI. Pleon in dorsal view. 



PLATE LIII A, B, c. Tylokepon bonnieri. 



A. (p. 718). 



n. s. Natural size of Cryptoniscus-stage in dorsal view to the right. 



oc. Eye in lateral part of the head, as seen when flattened out. 



a. s., a.i., or. p. First and second antennae, and oral parts. 



ffn.l, prp. 5, pip., tirp. First gnathopod, fifth peraeopod, a pleopod, uropods and end of pleon. 



B. (p. 717). 



w. s. Natural size of supposed male in curved position figured above laterally. 



C. Head with antenna of one side. 



gn. 1, gn. \. First gnathopods in attachment to the segment. 

 PI. Pleon in ventral view. 



C. (p. 716). 



n. s. Natural size of female specimen figured to the right in dorsal and ventral views. 



a. s., a. i., OS. First and second antennae and mouth in situ. 



mxp., gn. 1. Maxilliped and first gnathopod in their relative position, first gnathopod separately more 

 highly magnified. 



prp. 4, jwp. .5. Fourth and fifth peraeopods on the same scale as the separated gn. 1. 



PL Pleon in dorsal view. 



