Crangon and Galathea. 67 



Clieraphilus bispinosus (Westwood Sp.) 



Ponfophilus bispinosus. Westwood, Ilailst, Mag. Nat. Hist, viii., p. 11, 13, 



f. 30. 

 Crangon bispinosus. Bell, Brit. Crust., p. 268 ; A. White, Pop. Hist. Brit. 



Crust, 111. 



Rostrum shorty rounded at apex., somewhat narrowed, hollowed above ; ocidar 

 notch broad., ciliated on outer edge only ; carapace rounded above; median gastric 

 region bidentate, the teeth connected by an obsoletely-notched carina ; lateral gas- 

 tric and branchial regions furnished witli rows of small knobs ; jifth and sixth ab- 

 dominal somites bicarinated ; telson elongate, hollowed above ; second pjair of che- 

 lipeds half length of third. 



Rostrum short and somewhat narrow, attaining apex of eyes, sulcate above ; 

 ocular notch broad, shallow, ciliated at outer edge only, the external angle de- 

 veloped as a moderately-pointed tooth ; the carapace moderately broad, rounded 

 above, and having its surface covered by rows of small scale-like knobs ; the 

 median gastric region bears two prominent teeth, set one behind the other, and 

 connected by a row of minute knobs. 



The abdomen tapering and rounded above ; the first somite as broad as the 

 carapace ; the second, third, and fourth gradually narrowing, and the fifth and 

 sixth becoming abruptly almost linear, giving a characteristic contracted ap- 

 pearance to the posterior half of the abdomen, which is also to be seen in the 

 other Cheraphili. The superior surface of the first to fourth somite is smooth ; 

 that of the fifth and sixth bears two knobbed carinte, giving a sulcated appear- 

 ance to the segments. The telson is long, triangular, narrowed, sulcated at its 

 base. 



The external plates of the tail (sixth pair of pleopods) are long, narrow, 

 and terminating externally in a tooth. 



The first pair of chelipeds are short somewhat narrowed ; the propo- 

 dos somewhat triangular, the palm narrow, oblique ; the dactylos short, spini- 

 form. The meros, in the only specimen I have examined, is smooth internally, 

 and toothed superiorly externally. The second pair of chelipeds are mode- 



