498 Stimpson on the Crustacea and Echinodermata 
Hippolyte in its long elevated rostrum and inflexed abdo- 
men. ‘The carapax is everywhere spinous. 
Hab. Puget Sound, (Expl. Exped.) 
Mus. Expl. Exped. 
ATYA SCABRA. Leach. 
Atya scabra, Leacu; Zool. Miscel. v. iii. Pl. CXXXI. MizxE-Epwanps ; Hist. 
Nat. des Crust. ii. 348. Pl. XXIV. f. 15-19. Newport; An. and Mag. Nat. 
Hist. 1847, xix. 159 
Atya Mexicana, WIEGMANN ; Archiv für Naturgeschichte, 1836, i. 145. 
The specimens in the Museum of the Smithsonian Insti- 
tution from the fresh waters of Western Mexico agree in 
all their characters with the description given by Wies- 
MANN of his A. Mexicana, while they are exactly repre- 
sented by the published figures of A. scabra. Under these 
circumstances, I have ventured to cite WikcwaNN's name 
as a synonym. Mi.ne-Epwarps considers A. scabra to be 
a marine form, but there is great doubt that amy species of 
the genus is found in the sea. 1 
Hab. Misantla, (Deppe;) Western Mexico, (Mus. Smith- 
sonian.) : 
Mus. Phil Acad.; Smithsonian; Paris; Berlin; Brit. 
Mus. 
HIPPOLYTE AFFINIS. Owen. 
Hippolyte affinis, Ow; Zool. of Beechey's Voyage, 90, Pi. XXVII. f. 4. 
Hab. Monterey, (Capt. Beechey.) 
Mus. R. C. S.; Zodl. Soc. . 
HIPPOLYTE LAMELLICORNIS. Dana. 
Hippolyte lamellicornis, Dana ; U. S. Exploring Expedition, Crust. ka 
pe eee VIF 6 
This species is very closely allied to H. Ochotens's, 
Bnawpr, and to H. affinis, Owen. From the latter it ap- 
pears to differ in wanting teeth on the inferior side of the 
rostrum. 
Hab. Straits of De Fuca, (Expl. Exped.) 
Mus. Expl. Exped. 
