174 Rey. A. M. Norman on the British Species of Alpheus. 
As long ago as 1835, Mr. Hailstone procured off Hastings 
a shrimp, which he figured and described in ‘ Loudon’s Maga- 
zine of Natural History,’ and to which Mr. Westwood gave 
the name of Hippolyte rubra; in a subsequent page, Mr. Hail- 
stone claimed a right to name it himself, and styled it Aippo- 
lyte megacheles ; and further on in the same volume, Mr. West- 
wood established a genus for its reception, calling it Drenecta 
rubra. Why Prof. Bell omitted this species im his ‘ History 
of British Stalk-Eyed Crustacea,’ I cannot understand. In 
1854, Mr. Guise, having found the same species in the island 
of Herm, described it in the ‘Annals,’ and named it “Alpheus 
afinis.” Tn 1862 Prof. Heller pointed out the distinction be- 
tween the Red-Sea species (Alpheus Edwardsii, Aud.) and 
that found in the Mediterranean (Alpheus Edwardsti, Milne- 
Edwards), and named the latter Alpheus platyrhynchus. The 
Alpheus now found by Mr. Bate off the Dodman is the Medi- 
terranean species, and the same which had been previously 
taken in our seas by Hailstone and by Guise. As I write, 
thirty or forty specimens of this Alpheus, procured by me at 
Herm, are before me, and also a specimen of the true Alpheus 
Edwardsii of Audouin, for which I am indebted to Prof. Heller. 
From these examples I draw up the diagnostic characters which 
follow. 
Alpheus Edwardsti, Audouin. 
1826. Athanas Edwardsii, Audouin, Savigny, Descript. : “K, 
fig. 1 (figures admirable). a ieee 
1840 (P about), Alpheus Edwards, Guérin, Iconogr. du Régne Anim. 
Crust. pl. 21. fig. 3 (copy from Savigny). 
1861. Alpheus Edwardsii, Heller*, Sitzungsb. d. k. Akad. d. W. Math.- 
nat. Cl. xliv. Bd. i. p. 267. 
Supraorbital portions of anterior margin of carapace rounded, 
the front thus furnished with only a single central point, 
7.e. the rostrum. ‘The left first pereiopod much larger, and 
of totally different structure from the right; outer side of 
hand (not furnished with any spine-like central point pro- 
jecting at the junction of finger and thumb) having a deep 
incised curved groove widest at the distal extremity, sud- 
denly contracting in breadth towards the base, and at the 
same time curving downwards; finger large, very broad 
and massive, the outer margin very strongly arched, form- 
ing a complete semicircle; inner margin furnished at the 
base with a large tubercular process, which fits into a corre- 
sponding socket in the thumb. Right hand very much 
smaller, and formed more after the pattern of the hand in 
* Beitrage zur Crustaceen-Fauna des rothen Meeres. 
