EAST COAST MARINE SHELLS 



111 



Cedar Keys, west Florida to West 

 Indies 



GENUS ERATO Risso 1826 



Shell minute, lips minutely crenu- 

 lated; animal similar to Trivia. This 

 group is related to Marginella, being in- 

 termediate between that and Trivia so far 

 as the shell characters are concerned. 



ERATO MAUGERIAE Gray. Gray or flesh color, 

 shining. Length 5-6 mm. 



Taken alive by the writer upon 

 twigs in shallow water at low-tide in Lake 

 Worth, near Lower Inlet, Florida. 



PI. 40, Fig. 11 



Florida; West Indies 



Family Cassididae (Metal Helmet Shells ) 



Shell solid; spire short; whorls 

 often varicose; aperture ending in short 

 recurved canal; columella often plicate; 

 outer edge of lip strengthened, toothed 

 within; operculum corneous. 



Animal active and voracious; food 

 consisting m< stly of bivalve mollusks, 

 proboscis cylindrical; mantle and foot of 

 generous size. 



GENUS CASSIS Lamarck 1799 



CASSIS MADAGASCARENSIS Lamarck. (C, cameo 

 Stimp.). Surface spirally ridged but not 

 honeycombed; Interstices of teeth and ridges 

 inside deep chocolate brown. Length 8-10 

 inches. 



Observed, by the writer, living in 

 shallow quiet water of Lake Worth, Florida, 

 close to the inlets connecting with the At- 

 lantic. Only a small portion of the shell 

 was visible above the surface of the sand. 



PI. 1, Fig. 1 



Beaufort, North Carolina to the 



West Indies 



PHALIUM GRANULATUM Born. Spiral 

 grooves placed equal distances apart; sur- 

 face spotted with square zones of light 

 chestnut upon a yellowish-white ground; 

 columella granulate; outer lip toothed, 

 often greatly thickened. Length 3-4 inches. 



PI. 41, Fig. 1, PI. 75, Fig. 4. 



Cape Hatteras, North Carolina to 



Brazil 



CASSIS TESTICULUS Linne. Longitudinally 

 ridged, cut by spiral grooves, flesh color 

 or darker; columella plicated entire 

 length; strong teeth upon outer lip; mar- 

 gins shaded and cross banded with orange 

 brown. Length 2-3 inches. 



PI. 41, Fig. 3 



Cape Hatteras, North Carolina to 



Trinidad 



CASSIS TUBEROSA Linn6. Triangularly ovate 



in shape; three rows of tubercles or knobs; 



spotted with chestnut and chocolate color. 



Length 6-8 inches. 



PI. 41, Fig. 5 



Beaufort, North Carolina to Barba- 

 dos 



CASSIS FLAMMEA Linne. Shell cream colored, 

 clouded and crescent-marked with brown, 

 these markings also on face which is stained 

 with dark brown between ridges, interstices 

 of teeth on outer lip also dark colored; 

 three to four rows of separated blunt tuber- 

 cles; spire longitudinally ridged, usually 

 only below. Length 4-6 inches. 

 PI. 41, Fig. 2 



South Carolina; Lake Worth, Florida, 

 to Florida Keys; West Indies 



GENUS MORUM Roeding 1798 



Shell solid, surface covered with 

 rows of prominent warty nodules; outer lip 

 thickened, toothed inside; canal short, cal- 

 lus of columella region extending over base 

 and nodulous . 



MORUM ONISCUS Linne. Shell with low spire, 

 whorls often sharply shouldered; three rows 

 of nodules on body whorl; color white, spot- 

 ted with brown or gray; outer lip dotted, 

 interior white, callus white or purple. 

 Length 1 inch. 



PI. 53, Fig. 7 



Palm Beach (beach specimens); 



Florida Keys; West Indies 



Family Tonnidae 



Shell ventricoBe, spirally furrowed; 

 spire small, aperture very large; no opercu- 

 lum In the adult. 



Animal large, mantle dilated; foot 

 with horizontal groove. 



