1921 ] Schmitt: The Marine Decapod Crustacea of California 129 



a. Median projection of front triangular and acute. 



i. Carpus of large clieliped deeper than wide; inner face 

 flat and perpendicular, forming a sharply distinct 

 angle with the inferior or lower face. Small hand 

 very much compressed laterally, deeper than wide, 

 sides (inner and outer faces) subparallel. Anterior 

 portion of carapace very long, about one-third 

 longer than wide; not hairy, smooth and shining. 

 (Not known south of Monterey Bay.) 



Pagurus hemphillii, p. 142. 

 ii. Carpus of large cheliped not deeper than wide; inner 

 face rounded off below and passing more or less 

 evenly into the inferior or lower surface. Small 

 hand wider than deep, more flattened than com- 

 pressed; sides laterally swollen rather than parallel. 

 Carapace more or less hairy. 

 * Anterior portion of carapace wider than long, more 

 or less squarish or squat looking. Eye-stalks 

 short and stout. Acicle typically exceeding eye- 

 stalks, often, however, not so long. Dactyls of 

 ambulatory legs about as long as propodi. 



Pagurus Mrsutiusculus, p. 137. 

 ** Anterior portion of carapace longer than wide. Eye- 

 stalks moderately stout. Acicle never exceeding 

 eye-stalks. Dactyls quite short and stout, appear- 

 ing shorter than propodi, sensibly stouter than 

 in preceding species. (Not known north of Hum- 

 boldt County.) 



Pagurus samuelis, p. 139. 



1}. Median projection of front rounded, short, and low, very 



blunt or broadly rounded. 



, i. Small hand with outer face flat-triangular, forming a 



distinct angle with inferior or lower face; lower 



face smooth though hairy. Large hand more or less 



coarsely and irregularly granulate. Ambulatory 



legs moderately or extremely hairy. (Not known 



south of Monterey Bay.) 



Pagurus beringanus, p. 135. 

 ii. Small hand with outer face more or less swollen-tri- 

 angular, not forming a distinct angle with under 

 side; edge evenly rounded; lower face granulated 

 like the outer, scarcely if at all hairy. Large hand 

 more or less evenly and finely granulated. Ambula- 

 tory legs sparsely if at all hairy. 



Pagurus granosimanus, p. 141. 

 ii. Small hand comparatively very feeble, less than one-third 

 greatest width of palm of larger hand. Large hand more 

 or less suborbicular, feebly granulated on palm. Median 

 projection of front sharply triangular, acute. (Not known 

 north of Santa Catalina Island.) ■ < 



Pagurus calif orniensis, p. 143. 



