CRUSTACEA FROM THE BAHAMAS 89 



Family Alpheidae Bate 

 56. Alpheus edwardsii Audouin 



Athanas edwardsii Audouin, Planches de la descrip. de I'Egypte 

 par M. Savigny, Crust., PI. X, fig. 11, 1810. 



Bate, Challenger, Macrura, p. 542, 1888. 



{a) 4 specimens. Near Nassau, N.P., along shore, Feb. 20, 1890. 



{b) I specimen. Nassau, N.P., Jan., 1890. 



{c) 3 specimens. Under coral and in pools between tides, New 

 Providence. 



{d) I specimen. Under coral and in pools between tides, Nassau, 

 N.P., Jan., 1890. 



{e) 2 broken. Near Nassau, N.P., Feb., 1890. 



The distribution of this species is circumtropical. 



57. Alpheus hippothoe De Man 



bahamensis, n. var. (PI. xxx. Fig. 5) 



{a) 24 specimens. Under coral and in pools between tides, New 

 Providence. 



(6) 3 specimens, one with ova. Nassau, N.P., Jan., 1890. 



(c) 2 specimens, one with ova. 



This species is most closely allied to the variety edamensis of 

 Alpheus hippothoe De Man, from the Bay of Bengal and Indian 

 Archipelago (Arch, de Naturg., Bd. 53, p. 518, 1887). I am indebted 

 to Dr. Ortmann for a communication from Professor de Man com- 

 paring specimens from my material with his own hippothoe. As there 

 are certain differences between the West and East Indian specimens, 

 I propose to make a new variety for the West Indian. 



Total length from rostrum to telson, largest 24 mm., smallest 15 

 mm. Rostrum reaches nearly to end of first segment of inner antenna, 

 sharp, laterally compressed, prolonged backwards as a distinct keel. 

 Between keel and the prominent eyes a rounded depression. No ocular 

 spines. 



Inner antennae : first joint of peduncle with small spine on outer 

 surface; second joint nearly twice the length of proximal; terminal 

 joint one-half the length of second. Shorter flagellum, about the 

 length of peduncle. Longer flagellum slender, about thrice the length 

 of shorter. 



