CREPIDULA. 125 



C. GLAUCA, Say. PL 36, fig. 9. 



Rather flat, with a sharp pointed apex, yellowish brown with 

 radiating rows of chestnut spots, interior dark chestnut brown, 

 more or less mottled or spotted, septum white, diaphanous. 



Length, '75 inch. 



Long Island Sound to North Carolina. 



The darker color and smaller size distinguish this from 

 the preceding species, but I am not at all sure that it is more 

 than a varietal state of the young shell. Reeve's figure probably 

 represents a colorless C.fornicata. 



C. CONVEXA, Say. PI. 36, fig. 10. 



Convex, with somewhat trigonal outline, high back and ob- 

 liquely beaked apex ; whitish or glaucous radiately lined with 

 chestnut spots, with sometimes larger nebulous chestnut-purple 

 markings. Length, '75 inch. 



Nova Scotia to Florida. 



The form of this species is due to its attachment on the crus- 

 tacean Eupagurus longicarpus and the gastropod Ilianassa 

 obsoleta. The preceding species has been supposed identical 

 with this, and simply modified by attachment to broad flat sur- 

 faces ; this may be so, yet the present is a smoother, lighter-colored 

 heavier shell. Its identity with C. fornicata is not improbable. 

 C. navicula (Bunker), Morchja West Indian form, insufficiently 

 described, and unfigured, is probably a synonym. 



C. ADSPERSA, Dunker. PL 36, figs. 11,12. 



Ovate, more or less convex, rugulose 1 , white with chestnut 

 spots, epidermis olivaceous. Length, 1 inch. 



Benguela. 



Possibly a form of the last species. 



C. LENTIGINOSA, Sowb. PL 36, figs. 13, 14. 



Yellowish chestnut-colored, with purple chestnut radiating 

 series of spots. Length, 1 inch. 



Cape of Good Hope. 



Perhaps identical with C. convexa, Say, and the last species. 



C. CAPENSIS, Quoy. PL 36, figs. 15, 16. 



Suborbicular, flattened, radiately, obsoletely striated, chestnut- 

 brown, brighter colored within. Length, 1-25 inches. 



Cape of Good Hope. 



