Rev. A. M. Norman on the British Species o/Alpheus. 175 



Palcemon. The fingers of both hands articulating by a ver- 

 tical movement with the hand. 

 Hah, The Eed Sea. 



Alpheus megacheleSj Hailstone. 



1835. Hippolyte rubra, Westwood, Loudon's Mag. Nat. Hist vol. viii. 



§. 272 (but not Alpheus ruber, M.-Edw.). 

 5. Hippolyte megacheles, Hailstone, ibid. p. 395. 

 1835. Dienecia rubra, Westwood, ibid. p. 552. 

 1837. Alpheus Edwardsii, Milne-Edwards, Hist. Nat. des Crust, vol. ii. 



p. 352 (but not of Audouin). 

 1846. Cryptophthalmus ruber, Costa, Fauna del Hegno di Napoli, Crost. 



pi. 7. fig. 1. 

 1850. Dienecia rubra, White, Cat. Brit. Crust, in Brit. Mus. p. 41. 

 1854. Alpheus affifiis. 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. CI. xl. Bd. i. p. 400, pi. 1. figs. 21-24. 



1863. Alpheus platyrhynchus, Heller, Die Crust, des siidlichen Europa, 

 p. 276, pi. 9. figs! 18, 19. 



1868. Alpheus Edicardsii, Bate, Brit. Assoc. Rep. (1867), p. 283 ; Ann. 

 Nat. Hist. ser. 4. vol. ii. 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 

 dififering 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 set^e ; inner margin of finger microscopi- 

 cally pectinated. Fingers of both hands articulating by a 

 curious lateral movement. 



Hah. Herm (Guise & A. M. N.), Jersey (A. M. N.), Hastings 

 (Hailstone), off Dodman (Bate), Mediterranean (Milne- 

 Edwards), Adriatic (Heller). 



Alpheus ruber J Milne-Edwards. 



P1814. Cryptophthalmus ruber, Hafinesque, Precis des d^couvertes somio- 



logiques, &c. 

 P1825. Cryptophthalmus ruber, Desmarest, Consid. gen. sur Crust, p. 216. 

 1837. Alpheus ruber, M.-Edwards, Hist. Nat. des Crust, vol. ii. p. 351, 

 and Atlas du Regne Animal de Cuvier, edit, trois., Crust, pi. 53. fig. 1. 

 1840. Alpheus ruber, Lucas, Hist. Nat. des Crust, p. 182. 



* Beitrage zur naheren Kenntniss der Macrouren. 



13* 



