148 Marine Shells of the Western Coast of Florida 



Genus TRIVIA Gray, 1837 

 Trivia ppdiciilus-""' (Linne) PI. 28, fig. 206 



Alt., 12-15 mm. Shell subglobular with longitudinal dorsal 

 groove and fine transverse ribbing; extremities obtusely rounded; 

 aperture linear, canaliculate at extremities, transverse ribs con- 

 tinuous over involved lips; flesh-colored with spots and mottlings of 

 brown. 



Animal is grayish, mantle with pin-dots of red, foot gray, eyes 

 at outer base of tentacles. 



Taken on grassy bottoms near passes in Pine Island Sound, Lee 

 County, Florida. Dredged in the Gulf of Mexico in three to seven 

 fathoms. 



Trivia maltbiana-'ee Schwengel and McGinty PI. 49, fig. 335 



Length, 13; breadth, 10; height, 8 mm. This Trivia is about 

 the same size and shape as Trivia pedicnJus but is a creamy pink 

 with a large pale pink blotch in the center of the back. The ribs are 

 smoother and faintly continuous across the shallow dorsal sulcus. 



Dredged in 14 fathoms off Destin, Florida. 



Genus ERATO Risso, 1826 

 Erato mau§reriae-«7 Gray " PI. 28, figs. 207a, b 



Alt., 6 mm. Shell small, polished, greenish gray or olive-green, 

 white about lip margin; shape much like Marginella; spire incon- 

 spicuous, depressed; body whorl large, rounded, narrowed toward 

 base; aperture elongate, outer lip thick, lirate within; a basal notch 

 but no posterior notch. 



The animal is definitely phototrophic in aquarium and is able 

 to creep beneath surface film. Body mottled brownish, mantle gray- 

 ish with metallic-red spots, similar to mantle of some Marginellas. 



Dredged in two to seven fathoms. Generally found among 

 rugosities of zooid colonies or clinging to valves of Atrina. 



Family CASSIDIDAE 



Distribution of members of this family is general in warm seas 

 and through shallow to moderate depths. Sandy stations are pre- 



265 Lat., trii'ialis, tri, three; via, way; pediculus, louse. 

 268 Named for B. L. Maltby. 

 267 Gr., Erato, muse of poetry. 



