Rey. A. M. Norman on the British Species of Alpheus. 175 
Palemon. The fingers of both hands articulating by a ver- 
tical movement with the hand. 
Hab. The Red Sea. 
Alpheus megacheles, Hailstone. 
1835, Hippolyte rubra, Westwood, Loudon’s Mag. Nat. Hist. vol. viii. 
p. 272 (but not Alpheus ruber, M.-Edw.). 
1855. Hippolyte megacheles, Hailstone, ibid. p. 895. 
1835. Dienecia rubra, Westwood, ibid. p. 552. 
1837. Alpheus Edwardsti, Milne-Edwards, Hist. Nat. des Crust. vol. ii. 
p- 352 (but not of Audouin). 
mee peep hale ruber, Costa, Fauna del Regno di Napoli, Crost. 
Di. /. . L. 
1850. Dienecia rubra, White, Cat. Brit. Crust. in Brit. Mus. p. 41. 
1854. Alpheus affinis, Guise, Ann. Nat. Hist. ser. 2. vol. xiv. p. 275, 
1857. Alpheus affinis, White, Pop. Hist. Brit. Crust. p. 112. 
1862. Alpheus platyrhynchus, Heller*, Sitzungsb. der Kais, Wiener Akad. 
d. W. Math.-naturw. Cl. xl. Bd. i. p. 400, pl. 1. figs. 21-24. 
1863. Alpheus platyrhynchus, Heller, Die Crust. des siidlichen Europa, 
p- 276, pl. 9. figs. 18, 19. 
1868. Alpheus Edwardsii, Bate, Brit. Assoc. Rep. (1867), p. 283; Ann. 
Nat. Hist. ser. 4. vol. 11. p. 119. 
Supraorbital portions of carapace produced into spine-like 
points ; and these, together with the rostrum, give a triden- 
tate anterior margin to the carapace. The right and left 
first pereiopods formed on nearly the same model, though 
differmg in minute details, one (generally the left) larger 
than the other, and having the centre of its broad outer side 
produced forwards between the finger and thumb into a 
spine, above and below which the hand is excavated, the 
upper groove the larger, not curved; finger very flat, acute 
above, twisted, no tubercle on the inner margin. Smaller 
hand having that part of the thumb against which the finger 
impinges grooved ; upper margins of both finger and thumb 
fringed with long sete; inner margin of finger microscopi- 
cally pectinated. Fingers of both hands articulating by a 
curious lateral movement. 
Hab. Herm (Guise & A. M.N.), Jersey (A. M. N.), Hastings 
(Hailstone), off Dodman (Bate), Mediterranean (Milne- 
Edwards), Adriatic (Heller). 
Alpheus ruber, Milne-Edwards. 
21814. Cryptophthalmus ruber, Rafinesque, Précis des découvertes somio- 
logiques, &c., 
21825. Cryptophthalmus ruber, Desmarest, Consid. gén. sur Crust. p. 215. 
1837. Alpheus ruber, M.-Edwards, Hist. Nat. des Crust. vol. ii. p. 351, 
and Atlas du Régne Animal de Cuvier, édit. trois., Crust. pl. 53. fig. 1. 
1840. Alpheus ruber, Lucas, Hist. Nat. des Crust. p. 182. 
* Beitriige zur naheren Kenntniss der Macrouren. 
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