C. Spence Bate on the Penerdea. 175 
Independent of the above differential description of Milne- 
Edwards, it may be observed that this species has only nine 
teeth on the upper margin of the rostrum, while P. caramote 
has twelve; that the deep channel on each side of the dorsal 
carina has the margins parallel, whereas in P. caramote the 
line is waved and the channels broader posteriorly. 
The specimen taken as the type by Milne-Edwards in the 
collection that I examined was labelled from the island of 
Mauritius. 
There are specimens in the ‘Challenger’ collection from 
the Fiji Islands and Port Jackson that correspond closely in 
their general aspect with the typical form. ‘They are, how- 
ever, smaller in size, and vary somewhat in the aspect of the 
ventral plate of the female. In Japana larger form is known, 
specimens of which are in the British Museum as well as in 
the Jardin des Plantes ; but these, like those in the ‘ Chal- 
lenger’ collection, are females, and carry a pair of large 
fan-like membranous processes issuing from the anterior 
extremity of the ventral plate, the object of which I have not 
been enabled to determine; neither have I been able to procure 
or see a male specimen corresponding with this variety. 
Should it not be the same, I propose to call it P. japonicus. 
Peneus brasiliensis, Latreille. 
There was no specimen of this species in the collection when 
M. Milne-Edwards wrote, he having taken his information 
from Latreille. Milne-Edwards distinguishes it from P. canali- 
culatus by the presence of three teeth on the inferior margin 
of the rostrum. Mr. Miers, in his “ Notes on the Penzidz ”’ 
(P.Z.S. 1878, p. 806), says that there are two spines on 
the first pair of perelopoda and one on the second, and that 
the telson has no marginal spines. 
Inhabits the Atlantic, off Brazil. 
Peneus velutinus, Dana. 
This species, as described and figured in the United States’ 
Exploring Expedition, is covered throughout with a very 
short velvety coat. Rostrum straight, lanceolate, somewhat 
ascending from the base, dentate to the apex; seven teeth equi- 
distant, and one posterior ; lower margin entire, straight, ciliate. 
Dorsal surface not carinated or sulcate posterior to the 
rostral crest. Second and third pairs of pereiopoda subequal. 
Telson armed with minute spinules on either side. 
Length 12 inch. 
The habitat of the type is the Sandwich Islands. 
