112 HISTORY OF BRITISH CRUSTACEA. 



Alpheus ruber, M. Edw. Echvards's Bed 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. 



Tound by Mr. Cocks, of Falmouth, in the stomachs of 

 cod-fish. Mr. Cocks found a perfect specimen, which he 

 gave to the Piev. 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 apfinis, Guise.* — Deep scarlet colour, except 

 on the chelae, 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. 

 Front 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 Bienecia. 



