902 Stimpson on the Crustacea and Echinodermata 
PANDALUS HYPSINOTUS. Brandt. 
Pandalus hypsinotus, BRANDT; Sibirische Reise, i. 125. 
Hab. Unalaschka, (Wosnessenski.) 
Mus. Acad. Petrop. 
The preceding four species appear to resemble each other 
closely, and may perhaps be reduced to two upon more 
careful examinations of numerous individuals. Having no 
specimens of any of them, I have preferred to follow pre- 
vious authors rather than to attempt identifications from 
descriptions alone. 
PANDALUS DANZ. Stimpson, 
PLXXLI 8,7. 
Pandalus Dang, Stimpson; Proc. Bost. Soc. Nat. Hist. vi. 87. 
Thorax glabrous. Twelve teeth on the superior edge of 
the rostrum, including the dorsal crest, the posterior one 
being at about the middle of the carapax. Rostrum smooth 
above near its trifid apex, and six-toothed below, the basal 
tooth being large and much curved. Feet spinulose ; the 
spinules on the third joints few and distant. Length two 
and five tenths inches. : 
This species differs from all of those above mentioned in 
the much smaller number of teeth on the dorsal crest. The 
trifid apex is also quite characteristic. 
Dredged opposite Fort Townsend, in Puget Sound, b y 
Capt. Murden, of the cutter “ Jefferson Davis.” This, yi 
several other species of great interest, were forwarded by 
Dr. Suckley. 
Mus. Smithsonian; Phil. Acad. 
PALÆMON BRACHYDACTYLUS. Wiegmann. 
" | i 148 
Palemon brachydactylus, WirEGMANN ; Archiv für Naturgeschichte, 1836, 1 ] 
Inhabits the fresh waters of Western Mexico. 
Mus. Berlin. 
