426 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Panopeus affinis Streets and Kingsley, Bull. Essex Inst., vol. 9, 1877, p. 106 

 (type-locality not designated, but is one of Lockington's localities) . 



Euryiium affine A. Milne Edwards, Crust. R^g. Mex., 1880, p. 334, pi. 60, 

 fig. 1-lc. 



Diagnosis. — Carapace slightly convex, widest at tips of teeth of 

 last pair. Frontal lobes each with a slightly marked truncate outer 

 lobule. Sinus between coalesced teeth very shallow. 



Description. — Carapace slightly convex, granulate along front and 

 antero-lateral margins, especially on hepatic regions. Front with 

 lobes subtruncate, outer angles forming an obscure truncate lobule. 

 Lateral teeth shallow; outer angle of orbit subacute, separated from 

 next lateral tooth by a scarcely perceptible sinus, third tooth oblong, 

 truncate, fourth tooth broadly triangular, fifth most prominent later- 

 ally, acute. Teeth of lower margin of orbit narrow, subequal, tri- 

 angular, the inner one most advanced. A large tooth at base of 

 dactyl of larger chela. Legs sparsely long-hairy. 



Measurements. — Male (50484), length of carapace 14.7, width of 

 same 22, fronto-orbital width 12.6, width of front 6.4 mm. 



Range. — Mexico: West coast of Lower California and Gulf of Cali- 

 fornia. Ecuador (?). 



Material examined. — Magdalena Bay; C. R. Orcutt: September, 

 1913; 1 ovigerous female (54465). 1917; 1 male, 1 female (50638). 



Turtle Bay; August 1, 1896; A. W. Anthony; 12 males, 2 females 

 (19516). 



Pichilinque Bay; Albatross: April 29, 1888; 1 male, 1 female (22013). 

 3 males, 1 female (50484). 



Puerto Refugio, Angel Island; March 29, 1889; Albatross; 1 male 

 (16026). 



San Luis Gonzales Bay; March 27, 1889; Albatross; 3 males, 

 1 female (16027). 



Guaymas, gulf side; under stoneS; scarce; February 27, 1891; P. L. 

 Jouy; 3 males, 1 female (16079). 



Genus MICROPANOPE Stimpson 



Micropanope Stimpson, Bull. Mus. Comp. Zool., vol. 2, 1871, p. 139; type, M. 

 sculptipes Stimpson. 



Carapace of moderate width, slightly convex, regions usually lightly 

 indicated, commonly granulous or spinulous toward frontal and 

 antero-lateral borders. Antero-lateral borders arcuate, shorter than 

 postero-lateral, armed usually with five teeth or spines, of which the 

 last is much reduced and the second also reduced or altogether want- 

 ing. Postero-lateral borders moderately converging. Fronto-orbital 

 width great, usually three-fourths or more than three-fourths width 

 of carapace and front more than one-third width of carapace. Front 

 bilobed, outer angle rectangular, blunt, and situated below and in 

 advance of upper inner angle of orbit. Upper orbital margin with 



