680 ON CRUSTACEA BROUGHT BY DR WILLEY FROM THE SOUTH SEAS. 



DESCRIPTION OF PLATES LXIV— LXXIV. 



PLATE LXIV A. 



Nannastacus ossiani, n. sp. c? . 



n.s. Natural size of specimen, with enlarged lateral view above, and dorsal \dew below. 



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



m. Mandible, distal portion. 



mxp. 1. First maxilliped, without respiratory apparatus (epipod and exopod). 



mxp. 2. Second maxilliped. 



Prp. 1, 2, 3, 5. First, second, third, and fifth peraeopods. 



PLATE LXIV B. 



Natmasiacus georgi, n. sp. S- 



n.s. Natural size of specimen, with enlarged lateral, and less enlarged dorsal view below. 

 To the latter is appended a figure showing shape of the antero-lateral corner and the 

 pseudo-rostral projection with protruding respiratory plate of first maxilliped. 



PL Dorsal view of pleon. 



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



711. Mandible. 



mxp. 2, 3. Second and third maxilhpeds. 



prp. 1, 2, 4, 5. First, second, fourth, and fifth peraeopods, fifth in attachment to the 

 terminal segment of the peraeon. 



PLATE LXIV c. 



Leptochelia lifuensis, n. sp. 9 ■ 



n.s. Natural size of female, with dorsal view above. 



oc. Eye. 



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



m.m. Mandibles ; the right mandible above, the left below, with molar seen end on. 



l.i. Lower lip. 



nix. 1. First maxilla, with apex still more magnified. 



