CRUSTACEA — DECAPODA. 
273 
Homolii. — Milne Edwards and Lucas (Archiv. du Mus. d’Hist. Nat. 
ii. p. 463, t. 24-27) have characterized a new species of the genus 
Lithodes : L. hrevipes, from the South Sea, distinguished by the short- 
ness of the rostrum and the legs. 
Hippides. — The same authors (ibid. p. 474, t. 28) have founded a 
new group, called Albunhippa, indicating its close alliance to Albunea 
as well as Hippa ; the four antennae are of equal length, the external 
thicker, the internal cleft at the point ; the peduncle of the eyes slender, 
cylindrical ; both anterior feet have double fingered claws ; the native 
country of the A. spinosa, which was unknown to the authors, is the 
coast of Peru. 
Astacini. — A new sub-genus, Paranephrops, has been formed by 
Adam White (Gray, Zool, Misc. ii. p. 79), from P. planifrons, a new 
species, found by Dieffenbach in the River Thames in New Zealand. 
The author places it between Astacus (Potamohius) and Nephrops ; 
the eyes are large, as in Nephrops, the sides of the second section of the 
carapace have a spine, as in Astaciis (but a long series of the species of' 
Astacus have not this spine !) ; the rostrum has three teeth on the sides ; 
the scale of the external antennas projecting far over the thickened 
joints; the first two joints of the internal foot-jaws spinous on the out- 
side ; the middle leaf of the caudal fin of one piece ; the first pair of 
feet more slender than in Nephrops, the claws only flatly channeled 
with few rows of spines ; of the four other pairs of feet, the first is the 
shortest (in Nephrops the last), the second the longest, the last two of 
about the same length. Form that of Astacus. 
Carides. — K royer (vide Sel. Naturv. og math Afh. ix. D.) has given a 
very exact account of the northern species of the genus Hippolyte. 
There are fourteen species described, grouped as follows : — A. The ex- 
ternal foot-jaws with one palpus, but without the whip-like appendage. 
a. Legs also without it : H. smaragdina, new species from the coast of 
Norway. — B. Palpi and whip-like appendage to the external foot-jaw. 
h. Whip -like appendage to the first pair of feet : II . Fabricii, from 
Greenland, c. Whip-like appendage to the first two pairs of feet ; H. 
Gaimardii, Edw. ; H. gihba, new species from Spitzbergen ; H. mutila, 
new species from the coast of Norway, d. Whip-like appendage to the 
first three pairs of feet: H. Sowerhei, Leach {Cancer spinus. Sow.) ; H. 
macilenta, new species from Greenland ; H. turgida, new species from 
the coast of Spitzbergen, Greenland, and the north of Norway; H. 
Phippsii, new species, ibid. ; H. pusiola, new species from Christians- 
sund. — C. Whip-like appendage, but no palpus to the external foot-jaws. 
e. Whip-like appendage to the first two pairs of feet : H. polaris, Sab., 
very abundant on the coast of Greenland, also found at Spitzbergen and 
the coast of Norway ; H. borealis, Owen, ibid. /. Appendage to the first 
three pairs of feet : H. aculeata, 0. Fabr. {Cane, grbnlandicus, J. Chr. 
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