112 
HISTORY OF BRITISH CRUSTACEA. 
Alpheus ruber, M. Edw. Edwards's Red Shrimp. 
(Plate VIII. fig. 3.)— Beak small; no spine on outer side 
of the basal joint of outer antennae. The large hand with 
four longitudinal blunt crests, two on its upper margin, and 
two on its outer face ; its lower margin blunt ; the movable 
toe much shorter than the fixed one ; a spine on the upper 
margin of the two arms, at some distance from the end. 
Pound by Mr. Cocks, of Palmouth, in the stomachs of 
cod-fish. Mr. Cocks found a perfect specimen, which he 
gave to the Bev. Alfred Norman. This species must live 
at a very considerable distance from our coast. The genus 
is a numerous one in species ; they are chiefly found in the 
tropical seas, particularly in the West Indies and in the 
Indian Ocean. 
Alpheus affinis, Guise.'* — Deep scarlet colour, except 
on the chelse, which are mottled with yellow ; median line 
of carapace prolonged anteriorly into a short beak ; supra- 
orbital vaults each furnished at the end with a minute spine. 
I*; 
Pront legs unequal, the larger hand having on the upper 
edge two keels, one behind the other, each terminating in 
* Ann. and Mag. Nat. Hist. 1854, p. 278, fig. p. 280. Mr. Guise thinks 
this may be the Hippolyte rubra of Hailstone, on which Mr. Westwood 
founded the genus Dienecia. 
