tennse largest. The first three pairs of legs have much larger hands than ths 

 posterior ones ; those of the first pair being somewhat shorter and thicker than 

 the others. Color greyish above, from the numeroas minute, black punctations ; 

 pale yellowish or whitish below. Length, 0.8 inch; breadth, 0.8 inch. 

 Found among Gorgoniae in the coralline zone. 

 Hab. Cape of Good Hope, at Simon's Bay. 



44. Anthura catenula. Very slender, whitish, with a hollow square of 

 black on each segment above, giving a chain-like appearance to the back ; head 

 smaller than the first thoracic segment ; antennae rather long ; eyes black, at 

 the anterior corners of the first square of color ; anterior pair of legs short, 

 thick, and with strong, sub-cheliform hands; remaining legs slender. Abdo- 

 men slightly depressed, with a black transverse l^r, and a few symmetrically ar- 

 ranged black spots posteriorly. Length, 0.7 inch ; breath, 0.06 inch. Found 

 under stones at low-water mark. 



Hab. Cape of Good Hope, at Simon's Bay. 



45. Anthura laevigata. Body smooth and shining, transparent white, ex- 

 cept a few crimson spots at the extremities. Head narrow ; antenna; small, flat- 

 tened ; eyes minute, red. First three pairs of legs stout, with equal, sub-cheli- 

 form hands ; posterior legs slender. Abdomen with its posterior funnel-shaped 

 cavity large, and with its anterior segments well-marked. Length, 1 inch ; 

 breadth, 0.2 inch. On sandy bottoms in the circumlittoral zone. 



Hab. Cape of Good Hope, at Simon's Bay. 



46. Caprella solitaria. Smooth, slender, bright crimson ; superior an- 

 tennae with large peduncles, inferior ones slender, sub-pediform. Head with a 

 strong spine, pointed forward, between the minute eyes. Hands large, with two 

 spines within, the largest next the finger. Branchial leaflets of the third and 

 fourth segments very small. Posterior legs with their terminal articles much 

 curved. Length, 0.6 inch ; breadth, 0.05 inch. A single specimen, the 

 only caprella taken at the Cape, occurred on a gravelly bottom in Simon's Bay. 



47. Iphimedia obesa. Robust, thick ; superior antennae longest, in length 

 two-thirds that of the body, and with thick basal articles. Eyes very large, 

 sub-reniform, black. Feet of the first two pairs with equal subcheliform hands 

 of moderate size. Caudal stylets slender, smooth ; the posterior ones bi- 

 ramous. Tail terminating in one elongated scale. Color crimson with flake-white 

 blotches. Length, 0.25 inch. Found in the circumlittoral zone, 'on weedy 

 and sandy bottoms. 



Hab. Australia, at Port Jackson. 



48. CEdicerus fossor. Body rounded above ; abdomen with the third and 

 fourth articles compressed and raised above into a sharp crest. Head with 

 small round black eyes ; superior and inferior antennae equal, with stout flagella 

 forming half their length, each fiagellum consisting of about eighteen articles, 

 and having a serrated appearance from the produced, spine-like inferior corners 

 of each article. Mandibles palpigerous. External maxillipeds much elongated, 

 and curving downward. Feet of the first two pairs with equal, rather broad, 

 ovate hands, the finger being one-half as long as the hand ; those of the third 

 and fourth pairs with the terminal article sub-ovate or paddle-shaped, with a 

 rounded extremity covered with hairs, without an unguiculus ; fifth and sixth 

 pairs very short, with a compressed, clavate, or cutlass-shaped terminal article. 

 Epimera of the fifth pair very large, square. Caudal stylets all bi-ramous ; those 

 of the third pair with flattened rami, very hairy on their inner edges. Color 

 white with a few blackish spots. Length 0.2 inch. Found in the littoral 

 zone ; concealing themselves in the sand as they are washed out from it by suc- 

 cessive waves. 



Hab. Australia, at Botany Bay. 



49. Gammarus RUBRo-MACULATtJS. Rather large, spotted with crimson 

 above, white below. Eyes sub-ovate. Superior antennae half as long as the 



