Rey. T. R. R. Stebbing on Sessile-eyed Crustaceans. 33 
to be more or less finely pectinate, with whip-like ends. 
The back of the hand carries three or four groups of sete. 
ae finger is strong and curved, and matches the palm in 
ength. 
This species bears a strong general resemblance to Caprella 
equilibra, as described by Messrs. Bate and Westwood ; but, 
whereas in that species “the head is round and unarmed,” 
here the head has a smallrostrum; in that the second pereion- 
segment ‘is armed inferiorly, in the ventral median line, 
with a long straight tooth,” of which there is no trace in the 
present species. In Caprella equilibra the hands of the 
second gnathopods have the palms two thirds of their length, 
instead of less than half, and are figured with the greatest 
width near the base, while in our species the hands, contrary 
to what is usual among the Caprellide, widen distally. The 
third, fourth, and fifth segments are not unusually short as 
in C. cequilibra, 
The two specimens which have supplied the above details 
were dredged at Salcombe in August 1875, in the estuary, 
whence the specific name. 
The pair of spines at the palm of the hinder legs seem to 
be correlated in an interesting manner with the generic 
distinctions which have been established by various authors 
in the family of the Caprellide. Thus, in both the known 
forms of Proto they are placed at the origin of the palm, are 
rather slender, with the inner margin very finely pectinate, 
and terminate in a strong, though slightly curved, double 
hook. In Protella of Dana and Spence Bate, = Agina of 
Kréyer and A. Boeck, the species P. phasma has them at the 
base of the palm as in Proto, but short and simple, except for 
one minute notch not far from the apex. In Caprella acan- 
thifera of Bate and Westwood, the dginella spinosa of A. 
Boeck, they are long and slender, situated more than halfway 
down the inner margin of the hand, and have the distal por- 
tion of their own inner margin finely serrate. They are 
both preceded and followed by other pairs of finely pectinate 
spines with whip-like ends. In the accepted species of 
Caprella, as far as I have had an opportunity of examining 
them, namely in the forms known as C. linearis, C. lobata, 
C. tuberculata, C. acutifrons, as well as in the new species 
just described, the pair of spines nnder discussion agree in 
position at the origin of the palm, and are alike in being more 
or less boldly serrate on the inner margin, while they exhi- 
bit slight specific differences in regard to comparative length, 
breadth, and bluntness. F inally Caprella typica of Spence 
Bate, = Podalirius typicus of Kroyer and of A. Boeck, 
Ann. & Mag. N. Hist. Ser. 5. Vol. 1. 5) 
