174 C. Spence Bate on the Peneidea. 
side with a fixed inarticulate branch or protarsema, and on 
the outer with a sharp spine or stylocertte. The flagella are 
never longer than the carapace ; and the second pair of antenne 
carry a long scaphocerite. The pereiopoda have the first 
three pairs subequally chelate, with the hand not broader than 
the carpus, each increasing in length posteriorly. Posterior 
two pairs are simple, and all carry a basecphysis or branch 
attached to the basis joint. The pleopoda gradually decrease 
in length posteriorly; and the branchie are arranged as 
follows :— 
Pleurobranchiz ............ rire Werte Cee Re oe ba eed ee 
Arthrobranchiz ............ DD Oa eh eile 
Podobranchisz ............ sets eS aS BY 
Mastibranchiz ............ POSE ine: eit een oe an | eles 
h tk bmn _o 
Peneus caramote (Risso). 
This species is described by Milne-Edwards as being armed 
with a dozen teeth on the upper margin of the rostrum and 
one on the lower, situated a little in advance of the eyes; 
whereas the figure which represents it in plate xxv. fig. 1 
has only seven teeth on the upper margin of the rostrum and 
three on the lower, which is incorrect. The figure is reduced 
to about one third of the natural size. 
On each side of the central dorsal crest a deep furrow ex- 
tends from the anterior margin to close to the posterior, 
terminating before reaching it; and a third longitudinal groove, 
less deep but more elevated, separates these two in the poste- 
rior half of the carapace, and continues from the posterior 
margin to the base of the rostrum. A very short tooth is 
situated on the anterior border of the carapace just above the 
base of the first pair of antenne. The eyes are very large 
and short. The terminal filaments of the first pair of an- 
tenne are extremely short, being shorter than the last two 
joints of the peduncle. Basis of the three anterior pairs of 
legs armed with strong teeth. Telson armed on each side 
with three spines, of which the middle is the strongest. 
Length about 7 inches. 
Inhabits the Mediterranean. 
Peneus canaliculatus (Olivier). 
Is extremely like P. caramote, but is distinguishable by the 
rostrum being less elevated towards the base and more ciliated 
upon the superior border, by the absence of a tooth from the 
base of the third pair of legs and of spines from the telson. 
Length about 5 inches. 
Taken at the Celebes and the Isle of France. 
