PENEOPSIS DIOMEDE^. 185 



ranean Sea, and specimens thought by Professor S. I. Smith to belong to the 

 same species, were obtained by the " Albatross " Expedition of 1884 in the 

 Gulf of Paria, Venezuela.* S. disUncta\ is a native of the seas of Japan. It 

 has never, I believe, been figured, but from De Haan's description would 

 seem to be nearly allied to S. siphomccm. Bate, who examined the type 

 specimen of Peneus crassicornis M. Edw., from Bombay, in the collection of 

 the Jardin des Plantes, Paris, assigned that species to the genus Solcnoccra in 

 1881,:}: and described a new species Solemeera lucasii, taken by the " Challen- 

 ger" Expedition, south of New Guinea. But in his later report on the 

 " Challenger " Macrura, 1888, he removes S. lucasii from Solen'ocera on ac- 

 count of the different structure of the antennules, and leaves the reader in 

 doubt as to the proper position of Peneus crassicornis, though from his remarks 

 on page 285 I infer that Milne Edwards's species does not belong to the 

 genus Solenoccra. A common littoral Indian species of Solenocera is doubtfully 

 referred to Peneus crassicornis M. Edw., by Wood-Mason.§ Unlike S. sipJiono- 

 cera and S. agassizii, it lacks branchiostegal spines and has a simple unarmed 

 telson. Finally, a Solenocera has been recorded by Wood-Mason from the 

 Bay of Bengal, 65-240 fathoms. In this species, Solenocera hexiii.W as in 

 S. agassizii, the antennnlar flagella are shorter and broader than in any of 

 the previously described species, but the branchiostegal spine is wanting. 

 The spiny armature of the carapace of >S'. agassirdi agrees with that of 

 aS*. siphonocera, consisting of an antennal, an hepatic, and a branchiostegal 

 spine, and a sharp lateral spine on the edge of the cervical groove ; the 

 supra-orbital angle is prominent, but is not produced to a spine. 



PENEOPSIS Bate. 



Ann. Mag. Nat. Hist., 5th Ser., VIII. 182, 1881 lPena'opsis\ 



Peneopsis diomedese Fas. 



Plate G. 



Bull. M»s. Comp. Zool., XXIV. 212, 1S93. 



Integument hard, firm, and smooth. Carapace, including rostrum, about 

 four fifths the length of the abdomen. Rostrum long, nearly horizontal 



* Proc. U. S. Nat. Mus., VIII. 186, 1885. 



t Penrpus (Usfinrtiis De Hnan (Fauna Japonica, Crustacea, p. 194, 1849); Solenocera distincla Miers 

 (Proc. Zoolog. Soc. London, 1878, p. 302). 



+ Ann. Mag. Nat. Hist., 5tli Ser., VIII. 185. 



§ Ann. Mag. Nat. Hist., 6th Ser., VIII. 275, 1891. 



II Wood-Mason, Ann. Mag. Nat. Hist., 6th Ser., VII. 188, VIII. 275, 1891. 



