110 



EAST COAST MARINE SHELLS 



exchange, chiefly in countries near the 

 Niger. Uarco Polo observed them in use in 

 Yunnan in the thirteenth century while in 

 the Baltic region they have been found in 

 prehistoric graves. 



GENUS CYPRAEA Linn6 1758 



Surface brilliantly polished; spire 

 concealed by last whorl, or abbreviated and 

 covered with enamel. 



CYPRAEA CINEREA Gmelin. Shell brown, some- 

 times ornamented with Jet black dashes; 

 sides purplish-flesh colored; base cream 

 white or like sides; interstices of teeth 

 purplish. Length 1-1.75 inches. 



This species has been collected 

 alive under stones on the Tortugas. 



PI. 40, Fig. 4 



Florida; West Indies 



CYPRAEA EXANTHEMA Linne. A rather inflated 

 pale chocolate-colored species with large 

 round whitish spots and often with rings; 

 teeth very dark brown; dorsal line whitish 

 and straight. Length 3-4 inches. 



PI. 40, Fig. 5 



North Carolina to Florida Keys; 



Gulf of Mexico; West Indies 



CYPRAEA EXANTHEMA CERVUS Linne. Shell brown 

 with small white spots, base usually dark 

 brown. 



Shell more inflated, not so long, 

 spots not ringed as in the typical C. exan- 

 thema, also usually smaller. 



PI. 40, Fig. 19 



North Carolina to Florida Keys; 



Gulf of Mexico; West Indies 



CYPRAEA SPURCA Linn6. Shell spotted with 

 yellow-brown upon a whitish ground; base 

 buff or white; aperture slightly curved; 

 teeth strong, short; sides pitted and mot- 

 tled with yellow, often with brown spots on 

 pits and sides. Length 30 mm. 



Fresh dead specimens are frequently 

 found upon the lower east coast of Florida, 

 living under rocks at low tide in May. 

 PI. 40, Fig. 6 



Florida; Mediterranean; East At- 

 lantic 



GENUS TRIVIA Gray 1832 



Shell generally small, subglobular; 



ridged above with dorsal furrow; surface 

 scarcely shining; aperture narrow and long; 

 canal above and below very indistinct. 



Animal quite different from Cypraea. 



TRIVIA CANDIDULA Gaskoin. Globosely ovate; 

 ribs strong, rather conspicuous. Length 

 9 mm. 



PI. 40, Fig. 12 



Cape Hatteras, North Carolina to 



Barbados 



TRIVIA NIVEA Gray. Globose, extremities 

 very obtuse; ribs narrow, wrinkled. Length 



IS mm. 



Florida Keys to Barbados 



TRIVIA PEDICULUS Llnn6. Marbled with pur- 

 plish brown upon a flesh-white ground; dor- 

 sal furrow deep and straight, from which 

 radiate coarse ridges over shell and Into 

 aperture; dark spot each end of furrow and 

 another each side in centre. Length 15 mm. 



The largest of our east coast Tri- 

 vlas and a rather common one. 



PI. 40, Fig. 7 



St. Augustine, Florida to Barbados 



TRIVIA QUADRIPUNCTATA Gray. Color purplish 

 pink, often darker at ends, two darker spots 

 each side of furrow, the four forming a 

 zigzag row; ribs fine. Diameter 5 mm., 

 length 8 mm. 



PI. 40, Fig. 9 



Jupiter Inlet, east Florida to Bar- 

 bados 



TRIVIA SUBROSTRATA Gray. Globose, dark 

 chocolate-brown color; extremities slightly 

 beaked; dorsal line well marked. Length 

 7 mm. 



PI. 40, Fig. 13 



Florida Straits to Barbados 



TRIVIA GLOBOSA Gray. Shell white, rounded 

 like a pea; aperture narrow; dorsal line 

 well incised and extending to ends of shell. 

 Length 11 mm. Depth range 23-640 fathoms. 



PI. 40, Fig. 8 



Cedar Keys, west Florida to West 



Indies 



TRIVIA SUFFUSA Gray. Shell pinkish, ends 

 touched with dark pink; ribs five and not 

 very distinct; variegated with brown, base 

 of a lighter shade. Length 9 mm. 

 PI. 40, Fig. 10 



