724 MR. s. KEMP ON DECAPOD [June 15, 



specimens. In the type (PL LXXIII. fig. 9) there are four curved 

 dorsal spines, two long setse at the apex of the short distal prolon- 

 gation and one short spine on the inner margin. In tlie second 

 example (PL LXXIII. fig. 10) there are three dorsal spines, a 

 much longer distal prolongation, and six short spines on the 

 inner margin. 



The endopod of the first maxillipede falls short of the ajDex of 

 the exopod. The oval third joint is twice the length of the 

 second ; the fourth joint, when present, is very minute. The 

 basal joint bears two curved spines on its inner distal margin. 

 The merus of the second maxillipede (PL LXXIII. fig. 11) is 

 rather less than.tAvice as long as Made, and its anterior prolonga- 

 tion is not more than one-quarter the total length of the joint. 



In the first pair of pereiopods the carpus, which is about the 

 same length as the chela, is three-quarters the length of the 

 merus. In the second pair the carpus is one and a half times as 

 long as the chela, while the dactylus is evidently shorter than 

 the palm. The carpus of the third pair is fully as long as the 

 merus, the chela is about half the length of the carpus, and the 

 dactylus is considerably shorter than the palm. 



Each of the abdominal sterna bears a blunt and inconspicuous 

 tubercle ; the sixth somite alone is dorsally carinate. The lower 

 margins of the telson are bluntly bilobed at the base. The apex 

 is broken in the type; in the second specimen (PL LXXIII. 

 fig. 12) it is narrow, truncate, and is armed with a pair of stout 

 spines at each outer angle, between which are four plumose setse. 

 The petasma (PL LXXV. fig. 3) is almost identical in the two 

 specimens. 



The resemblance of this species to Gennadas alicei is very 

 marked, and it is by no means improbable that the two forms 

 will eventually turn out to be specifically identical ; in this case 

 the name given by Spence Bate claims priority. 



The chief points of difference between Gennadas inteo'viedius 

 and Bouvier's description and figures of G. alicei lie in the 

 presence of a rather obscure infra-antennary angle in the former 

 species, and in the forms assumed by the internal lacinia of the 

 second maxilla and by the merus of the second maxillipede. The 

 petasmata of the two species are similar. 



Gennadas calmani *, sp. n. (Plate LXXIV. figs. 5-11; 

 Plate LXXY. figs. 4 k 5.) 



St. 232. S. of Japan. 35° 11' K., 139° 28' E. 345 fathoms. Two 



males, two females, 49-56 mm. 

 St. 236. S. of Japan. 34° 7' X., 138° E. Trawl. 565 fathoms. 



One female. 55 mm. 

 St. 237. Near Yokohama. 34° 37' X., 140° 32 E. Trawl. 1875 



fathoms. One female, 53 mm. 



* This species is associated with the name of mj' friend Dr. W. T. Cahnan, to 

 whom I am indebted for much valuable advice and for every facility for work during 

 my visit to the British Museum. 



