824 THE AMERICAN NATURALIST. 
31. Meros long, broadest at distal end; carpus with distal spines above 
and below : C. gigas Dana P 
32. Height of carpus ind palm a no vr in palm below 
insertion of dactylus . ‘ C. stimpsoni Smith M 
32. Carpus considerably higher han palm; a notch in palm just below 
articulation of dactylus. . C. californiensis Dana P 
Genus Callichirus Stimpson 
33- Body membranous; carpus and hand very long. C. major Say M, S 
Family GEBIDÆ 
Genus Geéza Leach. Rostrum rough and hairy, chelipeds sub-equal. 
34. Pollex with strong tooth on inner margin; carpus smooth above, with 
a strong distal spine . : ‘ . G. pugettensis Dana P, D 
34. Pollex without tooth; carpus with a spine above, and five or six 
spines at tip . i í i : . G. affinis Say M, S 
Genus Axius Leach. 
35. Abdomen broader than carapax; no teeth on dorsal carina of carapax 
A. serratus Stimpson N, M 
35. Abdomen narrower than carapax; dorsal carina toothed 
A. armatus Smith M 
Genus Naushonia BEE] 
oe ‘ ; > N. crangonoides Kingsley M 
Genus Calocaris Bell. Hind ikale, pollex elongate; rostrum tri- 
angular. 
1y ; ‘ ‘ i : i ; ‘ C. macandree Bell N 
