78 STALK- AND SESSILE-EYED CRUSTACEA 
spme above. ‘Tarsi spinulous below. Length often nearly 4 in. 
(M. E.). 
New Zealand (Coll. Brit. Mus.). 
Found also on the coasts of Australia and Chili. 
Family Il. ATYIDA. 
Alphéens, M. Edw. (part) Hist. Nat. Crust. 1, p. 845, (1837). 
Atyide, sub-family Atyine, Dana, U.S. Explor. Exped. xii, Crust. 
part 1, p. 533, (1852). 
First and second pair of legs both small, weak, fingers ciliate. Hand 
articulated with wrist by the middle of its lower margin. Wrist of 
the first and sometimes of the second pair of legs linate-excavate 
anteriorly, of the second pair never annulated. Mandibles broad at 
top, slightly bilobed, not palpigerous. 
CARIDINA. 
Caridina, M. Edw. Hist. Nat. Crust. ui, p. 862, (1837). 
Carapace with a well developed rostrum. Internal antenne with 
two multiarticulate flagella, of which one is thickened at the base. 
External maxillipeds long, slender, and pediform, Thoracic legs with- 
out an accessory palpus. Anterior legs short, with the wrist nearly 
triangular, broadest and lunate-excavate in front. Hand articulated 
with the wrist at its lower angle, fingers lamellar, and spoon-excavate 
at the extremities. Second pair longer and more slender, wrist of 
normal shape. Hand similar to that of first pair. 
83, Caridina curvirostris. 
Caridina curvirostris, Heller, Voy. Novara, Crust. p. 105, (1865). 
Rostrum reaching beyond the antennal appendages, slender, greatly 
reflexed at the end, 12-dentate above, the teeth rather distant, the two 
last placed on the carapace, posterior to the eyes, the 2-3 front 
approximated at the apex; five dentate below. Legs of the first pair 
with the wrist shorter than the hand, of the second pair with the 
wrist slender, and longer than the hand. Legs of the second pair 
