364 AMPHIPODA ABEBRANTIA. 



palm not arcuate, near the middle obliquely excavate, and having 

 a few minute tufts of pubescence. Branchia3 quite small, oblong. 

 " Length | an inch. 



" Hah. Coral reef, Sooloo Sea. From the shores of a small island 

 off the harbour of Soung, in the large island of Xolo." — Dana. 



24. Caprella attenuata. (Plate LVII. fig. 7.) 

 Caprella atteuuata, Dana, U. S. Explor. Expcd. p. 817. pi. 55. f. 1. 



" Body very slender ; segments elongate. Second segment of pereion 

 nearly twice as long as the third, and very slender. Cephalon 

 hardly one-fourth as long as the next segment, bearing an acute 

 spine on the middle of the dorsal surface. Superior antennae 

 longer than half the body; first joint about half as long as the 

 second ; flagellum with from eight to ten articuli, about half as 

 long as the peduncle, first articulus very long and composite. In- 

 ferior antennae about as long as the first two joints of the peduncle 

 of the superior. Branchiae nearly linear. Propodos of the second 

 pail" of gnathopoda very narrow (about one-sixth as broad as long), 

 having an acute tooth just posterior to the middle of the lower 

 margin, and another anterior to the middle. 



** Length ^rds of an inch. 



" Hah. Rio Janeiro ; abundant." — Dana. 



25. Caprella aculeata. (Plate LVII. fig. 8.) 

 ^gina ? aciileata, Dana, U. S. Explor. Exped. p. 823. pi. 55. f. 5. 



♦' Near C. tenella ; slightly stouter. Cephalon hardly acute in front. 

 Second and third segments of the pereion armed with two curved 

 spines on the back, the others unarmed. Propodos of the second 

 pair of gnathopoda broad-eUiptical, arcuate below, obsoletely erose 

 and remotely pubescent. Branchiae quite small, oblong. 



" Length nearly | an inch. 



" Hah. Rio Janeiro, with the preceding." — Dana. 



26. Caprella ultima, n. s. (Plate LVII. fig. 9.) 



Male. — Cephalon surmounted by a blunt tooth. First two segments 

 of the pereion subequal ; together, about one-third the length of 

 the animal. Eyes small, round. Superior antennae not half the 

 length of the animal. Inferior antennae reaching beyond the ex- 

 tremity of the second joint of the superior antennae. First pair of 

 gnathopoda small, articulating one-third from the posterior ex- 

 tremity of the second segment of the pereion ; propodos long and 

 narrow. Second pair of gnathopoda large ; propodos long ; palm 



