EAST COAST MARINE SHELLS 



141 



GENUS HYDATINA Schumacher 1817 

 (WATER-BLISTER SHELLS) 



HYDATINA PHYSIS Linne. Shell thin, semi- 

 pellucid, whitish, with waved lines. Length 

 1 inch. 



This remarkably handsome and strik- 

 ing shell is said to live upon clean sand 

 but Frank Lyman reports its occurrence on 

 weeds in Lake Worth, Florida. 



PI. 53, Fig. 13 



Southern Florida; Gulf of Mexico; 



West Indies 



GENUS MICROMELO Pilsbry 1894 (Bullina Fer.) 



MICROMELO UNDATA Brugulere. Shell oval, 

 umbillcated; yellowish white with trans- 

 verse red lines, grooved surface, spaces 

 between grooves punctured; apex sharp, 

 whorls four; single fold on columella. 

 Length 14 mm. It was first collected on 

 the mainland by Mrs. Frank Lyman. 



PI. 53, Fig. 8 



Deerfield, Florida to Florida Keys; 



West Indies 



Family Akeridae 



GENUS HAMINOEA Turton and Kingston 1830 

 (Hamlnea "Leach" Gray 1847) 



Small, very delicate shells; not 

 strictly vegetarian. They inhabit muddy 

 places near mouths of rivers. Animal much 

 larger than shell which is more or less in- 

 ternal. 



HAMINOEA ANTILLARUM Orbigny. Shell narrow- 

 er above, swollen below, subtranslucent, 

 often slightly greenish, normally horn col- 

 ored; thickened outer lip starting from 

 right side of center, produced high above 

 vertex; upper portion of aperture twice 

 width of lower. Length 10 mm. 



The typical shells from the Florida 

 west coast, almost white in color, are 

 abundant . 



PI. 53, Fig. 2S 



Tampa, Florida southward; West 



Indies 



HAMINOEA ANTILLARUM GUADALUPENSIS Sowerby. 

 Shell thin, distinctly compressed above, 

 greenish yellow; surface with unevenly 

 placed growth wrinkles; columella extremely 

 concave and with white callus, making a 



slight fold above. Length 18 mm. 



It has been observed living upon 

 tidal flats near the mouth of New River at 

 Fort Lauderdale, Florida. A few also were 

 taken in Upper Biscayne Bay. It is usually 

 a larger shell than H. antillarum and more 

 deeply colored. 



PI. 53, Fig. 4 



White Water Bay and west Florida, 



northward on east coast to Fort 



Lauderdale, Florida 



HAMINOEA ELEGANS Gray. Shell thin, pellu- 

 cid, white or yellowish; sculptured with 

 clear-cut incised straight spirals as if 

 machine engraved; entire surface scored with 

 minute, mingled with much coarser unequally 

 spaced, grooves. Length 12 mm. 



Rather frequently taken in drift, 

 when conditions are favorable, near the 

 Yamato rocks, east Florida. It probably 

 lives somewhere nearby. 



PI. 53, Fig. 8 



Florida to Brazil; Texas 



HAMINOEA PETITII Orbigny. Shell truncated 

 above, rounded below; color light yellowish 

 green; imperforate; columella rather straight, 

 not folded above. Length 9 mm. 



Similar to H. antillarum but more 

 cylindrical and columella straighter than 

 in other West Indian Haminoea. 



PI. 57, Fig. 11 



Tampa, Florida to West Indies 



HAMINOEA SOLITARIA Say. Shell bluish white, 

 fragile, last whorl enveloping all others; 

 surface shining; fine, deeply impressed spi- 

 ral grooves; vertex white, impressed in mid- 

 dle. Length 10 mm. 



The imperfect opening in the region 

 of the spire is characteristic. It is not 

 rare upon the New England coast and New 

 Jersey. 



PI. 71, Fig. 20 



Massachusetts to Georgia 



HAMINOEA SUCCINEA Conrad. Shell cylindri- 

 cal, very thin, diaphanous, amber color; 

 sculptured with minute wrinkled lines; 

 columella concave or channelled below; ani- 

 mal dark brown. Length of shell 10 mm. 



It is said to be common in Tampa 

 Bay. 



PI. 56, Fig. 10 



Florida; Texas; West Indies 



