EUPAGURUS CALIFORNIENSIS. 55 



In the unique type specimen of C. ianncri the abdomen is not quite sym- 

 metrical, but this may be an individual peculiarity resulting from the shape of 

 the cavity in the stone which formed its abode. 



CALCINUS Daxa. 



Proc. Acad. Nat. Sci. Phila., V. 2(58, 1851. 



Calcinus obscurus Stimps. 



Ann. Lye. Nat. Hist. N. Y,, VII. 83, IS59. 



Two specimens, collected at Panama. The larger specimen is in the 

 shell of Nerita scabricosta. 



EUPAGURUS Brandt (restr.). 



Middeudorff 's Sibirische Reise, Bd. II., Tli. 1, p. 105, 1851. Restricted by Stimpson, Proc. Acad. 

 Nat, Sci. PLila. X. 236, 1858. 



Eupagurus CaliforniensiS Benedict. 



Plate XI., Fig. 2-2^. 



Proc U. S. Nat. Mus , XV. 21, 1892. 



This species belongs to the E. iemdmanus group (subgenus EkssocJurus 

 Benedict*), which includes smooth species with broadly oval right hand, 

 very small left hand, and ophthalmic scales usually long, pointed, and con- 

 cave above. The species belonging to this group in many ways approach 

 the genus Pj/lopagurus A. M. Edw. et Bouv.,t but the right hand is not trans- 

 formed into the highly specialized operculum of Pi/lopagurus, and there are 

 no paired sexual appendages on the abdomen in either sex. 



Descripiion of a male. — Body and appendages, in general, smooth and free 

 from hairs. Carapace shorter than the abdomen ; anterior section longer 

 than the posterior, indurated, smooth, polished, naked, convex from side to 

 side, longer than wide ; gastric region bounded on each side by a conspicuous 

 longitudinal furrow ; median projection of the front short and acute, pro- 

 duced beyond the lateral projections, which are angular but not acute ; a stiff 

 hair springs from each side of the base of the median projection of the front. 

 Eye-stalks rather long, curved slightly outward, somewhat enlarged at the 

 distal end, and furnished with a few small tufts of hair arranged in a longitu- 



• Proc. U. S. Nat. Mus., XV. 1, 1S92. f Mem. Mus. Coiup. Zool., Vol, XIV , No 3, p. 74, 1893. 



