54: Mr. W. V. Guise on a new species of Alpheus. 
doned for expressing my surprise, which I do with great defer- 
ence to the high attainments of Professor Bell, that that distin- 
guished naturalist, in adopting the “ Crangon bispinosus” and 
“ trispinosus” of Mr. Hailstone, should have omitted all reference 
to a form so very remarkable and so carefully detailed as Mr. 
Hailstone’s “ Hippolyte rubra.” 
In the belief that my Channel Island Crustacean is a new and 
undescribed species, I propose to bestow upon it the name of 
Alpheus affinis ; thereby indicating the close relationship which 
it bears to the three other European species already referred to. 
5 
Fig. 1. Alpheus affinis, natural size. . 
2, Enlarged view of front of carapace, showing supra-orbital vaults, 
insertion of antennz, &c. 
3. Front of carapace still further enlarged, showing beaked rostrum 
and spimous armature of supra-orbital vaults. 
4. Enlarged view of larger pincer. 
5. Enlarged view of lesser pincer. 
6. Tail. 
