182 Marine Shells of the Western Coast of Florida 



Cerodrlllia perrjae Bartsch and Rehder PI. S8, fig. 260A 



Alt., 12.9; greatest diam., 5.3 mm. Shell elongate-turreted, 

 flesh colored, a broad golden-brown band, from middle of turns to 

 a little beyond periphery. Eight and a half whorls . . . Post-nuclear 

 whorls moderately rounded, marked by strong, distinctly spaced, 

 broad axial ribs, which on early whorls are best developed at peri- 

 phery; in later whorls the hump is a little anterior to the middle 

 . . . Spaces separating the ribs are broad and shallow with micro- 

 scopic incremental lines and faint spiral striations . . . Base mod- 

 erately long, marked by feeble spiral threads which increase in 

 length from periphery and develop into five equal and almost 

 equally spaced cords on the columella. Outer lip with notch anterior 

 to the summit . . . backed by a heavy varix. Anterior channel pro- 

 found; . . . columellar callus extends up on parietal wall. 



C. thea differs from this species in being of uniform chocolate- 

 brown, with axial ribs shorter and broader, the knobs more pro- 

 nounced.^^* 



Dredged in five fathoms off Sanibel Island, Florida. 



Cerodrillia thea^'''^ Dall PI. 38, fig. 261 



Alt., 15 mm. Shell fusiform, surface waxy. Color of strong tea, 

 thin epidermis; eight convex whorls crossed by nine to eleven varices, 

 strongest at periphery of whorls; faint spiral threads at base of body 

 whorl; sutures distinct, aperture oval, more than half length of 

 body whorl; outer lip curved forward, deep subsutural notch, shallow 

 notches near base; short, straight anterior canal; interior of aperture 

 dark-colored, polished; columella with narrow callus; brown corneous 

 operculum. 



From littoral zone to 15 fathoms. Fairly common about sand 

 bars of inside waters. 



Subgenus LISSODRILLIA Bartsch and Rehder, 1939 

 Cerodrlllia schroederi-s" Bartsch and Rehder PI. 38, fig. 262 



Alt., 5 mm. An unusually large specimen has an altitude of 



•■'»* Bartsch and Rehder: Proc. U.S. National Museum, vol. 87, No. 3070. 



Description given is condensed from the original. 

 ^^^ "Colored like tea leaves that have been steeped," Dall. 

 ='•''« Dedicated to Lt. Seaton Schroeder. 



