PENEOPSIS DIOMEDEZ. 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. distincta 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. siphonocera. Bate, who examined the type 
specimen of Peneus crassicorus M. Edw., from Bombay, in the collection of 
the Jardin des Plantes, Paris, assigned that species to the genus So/enocera in 
1881,+ and described a new species Solenocera 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 Solenocera 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 Solenocera. A common littoral Indian species of Solenocera is doubtfully 
referred to Peneus crassicornis M. Edw., by Wood-Mason.§ Unlike S. s¢phono- 
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 heatii,|| as in 
S. agassizii, the antennular 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. agassizii agrees with that of 
S. 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 Bare. 
Ann. Mag. Nat. Hist., 5th Ser., VIII. 182, 1881 [ Pexeopsis]. 
Peneopsis diomedex Fax. 
Plate G. 
Bull. Mus. Comp. Zodl., XXIV. 212, 1893. 
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. 
+ Peneus distinctus De Haan (Fauna Japonica, Crustacea, p. 194, 1849) ; Solenocera distincta Miers 
(Proe. Zodlog. Soc. London, 1878, p. 302). 
+ Ann. Mag. Nat. Hist., 5th Ser., VITL. 185. 
§ Ann. Mag. Nat. Hist., 6th Ser., VIII. 275, 1891. 
|| Wood-Mason, Ann. Mag. Nat. Hist., 6th Ser., VIT. 188, VIII. 275, 1891. 
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