s})ined front, like tliat of Alpkcus mi mi.';, Say, and has 

 nothing to do with the Alplieus Neptttnus of White. 

 Hab. Port Essington. B.M. 



Alpheus strexuus. 



Alpheus Doris, IVhitc, List Crust. Brit. Mus., p. 75 

 (1847) ; Zool. Erebus and Terror, tab. 4,/. 2 (1874). 



Alpheus Ehode, White, List Crust. Brit. 3fus.,p. 75 (1874). 



Alpheus strenuus, Dana, U.S. Explor. E.rpcd. XIII., 

 Crust. I., p. 545, pi. 34, /. 2 (1852). 



Larger hand hairy, especially towards the fingers, with a 

 longitudinal groove above on the inner surface close to tiie 

 upper margin and an oblique groove on the outer surface 

 of the palm. Smaller hand opening nearly horizontally, 

 the outer (moveable) finger flattened, with an oblique ridge 

 at its base on the outer surface, the margins thickly ciliated. 

 The two first joints of the carpus of the second pair of legs 

 equal in length and each longer than either of the three 

 following joints. 



Hab. Philippine Islands. Torres Straits. B.M. 



Alpheus galathea. Tab, 4, Jij. 4. 

 Alpheus Galathea, White, Lint Crust. Brit. Mus., p. 75 

 (1847). 



Hab. Port Essington. Type. B.M. 



Alpheus alope. Ted). ■^,fi(j. 6. 



Alpheus Alope, White, LUt Crust. Brit. Mus., p. 75 (1847). 



Hab. Australia, Port Stephen. Type. B.M. 



The types of Alpheus galathea and Aljilnns n/Dpem the 

 British Museum belong to this section df ilic uciius, but are 

 in too bad a condition to be distinctively cliaracterised. 



** Beak triangular, rising beliind the front margin of the 

 carapace. (Orbits with spines over the eyes.) 



Alpheus doto. Tub. 4, Jig. 5. 



Alpheus Doto, White, List Crust. Brit. Mus., p. 75 (1847). 



Eostrum narrow, triangular, scarcely projecting beyond 

 the front of the carai)ace. Upper mai-gins of the orbits 

 with a minute s\nne. Hands (in the figure, the left hand 

 is now wanting in the type) similar, the left the smallest. 

 Kight liand smooth, witli scattered yellowish hairs, the 

 lower margin straight entire, the upper convex. Fingers 

 very small. The first joint of the carpus of the second 

 pair of legs longer than the second, the second joint about 

 as long as the third and fourth together. 



Hab. Sir C. Hardy's Island. Type. B.M. 



Alpheus thetis. Tab. A, fig. 7. 



Alpheus Thetis, White, List Crust. Brit. J/«.s., p. 75 

 (1847). 



Hab. New Holland. Type. B.M. 



The specimens of this species in the British Museum 

 are in too imperfect a condition to be well distinguished 

 from other species of the same section of the genus. The 

 hands are wanting. The beak projects beyond the front 

 margin of the carapace ; the first joint of the carpus of the 

 second pair of legs is longer than any of the succeeding. 

 In these respects A. thetis resembles the Alpheiis lacvis, 

 Randall, Journ. Acad. Nat. Sci. Philad. VIII., p. 141, 

 figured by Dana, U.S. P^x'plor. Exped. Crust, pi. 35, fig. 8, 

 with which it may be identical. 



