KEY TO GENERA OF INACHID^ 23 



Key to Genera of Inachid;e Found in Monterey Bay. 



a. Length of basal antennal joint (measured from raised margin of 

 endostome to insertion of free joints) greater than, or equal to, 

 the combined width of the same joints and that portion of the 

 epistome or antennular fossettes lying between them, measured 

 from bases of eye-stalks (middle of lower orbital margin). 

 b. Post-ocular spine inconspicuous and distant from eye. 



c. Chelipeds fairly short and stout (dactyl about equal to palm), 



no supraocular spine. Podochela 



cc. Chelipeds long and slender (dactyl equal to about one-third 



palm), a prominent supra-ocular spine. Erileptus 



bb. Post-ocular spine prominent and close to eye. 



c. A prominent, acute supra-ocular spine. Anasimtis 



cc. Upper margin of orbit prominent, but without a spine. 



Dasygyius 

 aa. Length of basal antennal joint less than distance between lower 

 orbital margins (usually in the proportion of 2 to 3). 

 b. Post-ocular spine, if present, with anterior face convex or flattened 

 so that cornea of retracted eye is always visible from above ; 

 exognath of outer maxilliped widest in distal half, taper- 

 ing abruptly. 

 c. Lateral margins of carapace not markedly flattened or pro- 

 duced. 

 d. Surface of carapace smooth or undulated. Epialtus 



dd. Surface of carapace with spines or tubercules. Pugettia 

 cc. Lateral margins of carapace markedly flattened and pro- 

 duced. Minndus 

 bb. Post-ocular spine cupped or with dense growth of hair on an- 

 terior face so that cornea of retracted eye is partially con- 

 cealed from above; exognath of outer maxilliped widest in 

 basal half, tapering gradually. 

 c. Post-ocular spine flattened and densely hairy on anterior face. 



Loxorhynchus 

 cc. Post-occular spine deeply cupped on anterior face and with- 

 out hairs. 

 d. A supra-ocular spine present. 



