BAHAMA CRUSTACEA. 249 



mensis). A quadrangular rather than a triangular depression 

 on side of large hand. 



First joint of carpus of second pereiopod is equal in length to 

 second (shorter in cdamensis). Third and fourth pereiopods 

 less broad than in edaineiisis. 



58. Alpheus websteri Kingsley. 



Kingsley, Proc. Acad. Nat. Sci. Phil., p. 416, 1879. 

 id) 3 specimens, one with ova. Along shore, near Nassau, 

 N. P., Febr. 20, '90. 



(b) 2 specimens, one with ova. Nassau, N. P., Jan. 10, '90. 



(c) 3 specimens, fragmentary. Nassau, N. P., Jan. 10, '90. 

 Kingsley's type specimens were from Key West ; it has been 



reported by Herrick from Nassau, N. P. 



A. ivebsteri is very probably the same as A. formosiis Gibbs 

 (Proc. Amer. Ass. Ad. Sci., p. 196, 1850). The descriptions 

 apparently tally, though Gibbs makes no mention of the small 

 black spine on the uropod which is mentioned as a character- 

 istic feature by Kingsley and which is very evident in my speci- 

 mens. 



59. Alpheus nigro-spinatus n. sp, (PI. xxx, Fig. 6). 



{a) Two specimens. Under coral and in pools between tides. 

 New Providence. 



Carapace compressed. Rostrum short, acuminate, no longer 

 than spines of ocular hoods ; extended backwards as a ridge 

 between the eyes, from each of which it is separated by a 

 rounded depression. Spines of ocular hoods short, acuminate. 

 The front of carapace is thus marked by three, nearly equal, 

 small spines. Inner antennae : Basal segment of peduncle with 

 small spine (stylocerite) ; second and third segments, no spines 

 but scattered hairs ; second segment a little more than twice as 

 long as the terminal ; outer flagellum stouter and shorter than 

 the inner. Outer antennae : Outer angle of the basal joint of 

 peduncle with a sharp, short spine ; scaphocerite broad at base, 

 outer margin produced into a strong spine which is longer than 

 the inner, lamellar portion ; distal end of terminal segment of 



