140 



EAST COAST MARINE SHELLS 



The original specimen came from St. 

 Martin, West Indies. 



PI. 53, Fig. 6 



Palm Beach County, Florida to West 



Indies 



ATYS CARIBAEA Orbigny (A riiseana Orb.?). 

 An oblong, thin, smooth, shell which is 

 distinctly striated at both ends; spire in- 

 visible and with an umbilical depression 

 above; aperture not wide; color white. 

 Length 5-8 mm. 



Not uncommon after storms upon the 

 beaches at Boynton and Yamato, Florida. 



PI. 53, Fig. S3 



North Carolina to West Indies 



GENUS DIAPHANA Brown 1827 



DIAPHANA DEBILIS Gould, Shell small, trans- 

 parent, inflated, smooth; whorls four. 

 Length 4 mm. Range 6-16 fathoms. 



PI. 71, Fig. 24 



Greenland to Connecticut 



GENUS CYLICHNA (CUP SHELLS) 



CYLICHNA ALBA Brown. White Cup. Shell 

 smooth, whitish, size of a grain of rice, a 

 pit in place of the spire; covered with a 

 rusty epidermis; many minute revolving 

 lines; aperture narrow, becoming suddenly 

 double the width; lip sometimes waved in- 

 ward at the center. Length 5 mm. Clrcum- 

 boreal in distribution. Range 10-1091 

 fathoms. Dead shells are not rare on the 

 beaches. 



PI. 53, Fig. 12 



Greenland to Block Island, Rhode 



Island 



GENUS CYLICHNELLA Gabb 1872 

 (LITTLE CUP SHELLS) 



CYLICHNELLA BIDENTATA Orbigny. This tiny 

 shell has two distinct folds upon the col- 

 umella. Length 4 mm. Range 7-168 fathoms. 



It is not infrequently taken upon 

 the beach at Sanibel, Florida. 



PI. 53, Fig. 19 



PI. 65, Fig. 14 



Cape Hatteras, North Carolina to 



Florida; Texas; West Indies 



CYLICHNELLA ORYZA Totten. Rice Cup. Shell 

 minute, white, shining; last whorl covering 

 all the others and with only a few revolv- 



ing lines; summit depressed into a shallow 

 pit; columella twisted to form an oblique 

 pit, at its base ending abruptly to form a 

 blunt tooth; no umbilicus. Length 4 mm. 

 Range 2-4 fathoms. 



It has been found in the mud of New 

 Bedford and Newport harbors. 



PI. 71, Fig. 23 



Maine to Connecticut 



Family Bullidae 



Shell oval, external or partially 

 covered by the animal; aperture longer than 

 shell; rounded at ends, lip sharp; coliimel- 

 la short and concave. 



GENUS BULLA Linne 1758 (BUBBLE SHELLS) 



BULLA OCCIDENTALIS Adams. Western Bubble. 

 Ovately oblong, opaque, solid; color usual- 

 ly pale red, variegated with waved lines 

 and brownish spots. Length 25 mm. 



The most plentiful Bulla in Florida 

 waters. 



PI. 53, Fig. 10 



Florida to Texas; West Indies 



BULLA SOLIDA Gmelin. Solid Bubble. Shell 

 oblong, white, solid, epidermis light brown; 

 strongly grooved at each end, smooth in 

 center; last whorl keeled in middle, lip 

 twisted and expanded; slight fold in col- 

 umella. Length 35 mm. 



PI. 53, Fig. 9 



Florida Keys and West Indies 



BULLA STRIATA Bruguiere. Threaded Bubble. 

 Shell ovate, solid, variegated with red- 

 brown and red; apex umbilicated; aperture 

 partly dilated below, narrowed above, outer 

 lip depressed in middle; both ends spirally 

 striated. Length 1 inch, often less. 



PI. 53, Fig. 17 



Palm Beach County; Clearwater, 



Florida 



Family Hydatinidae 



Shell oval, highly colored; spire 

 wide, depressed, outer lip sharp. Animal 

 with large foot extending beyond shell; 

 eyes small and black. 



