130 



EAST COAST MARINE SHELLS 



with yellow. It is further characterized 

 by strong, even, plaits on the columella, 

 the lower ones the stronger; outer lip 

 toothed only in the central part. Some- 

 times, among the fossil specimens, there 

 Is a tendency toward angulation at the 

 periphery. Length 3-4 mm. 

 • PI. 50, Fig. 21 



North Carolina to Gulf of Mexico; 

 West Indies 



MARGIRELLA DENTICULATA OPALINA Stearns. 

 Shell a uniform amber color, sometimes with 

 suggestions of bands. It has been dredged 

 In shallow water on the west coast of Flor- 

 ida including Tarpon Bay. Length 3-4 mm. 



PI. 50, Fig. 19 



West Florida 



MARGINELLA GUTTATA Dillwyn. Shell flesh 

 color, broadly banded with a darker tint 

 and surface covered with white flecks; two 

 to five broad bands or stripes upon outer 

 lip and base. Length 16-25 mm. 



PI. 50, Fig. 18 



Cape Hatteras, North Carolina to 



West Indies 



MARGINELLA MINUTA Pfeiffer. Shell white, 

 four plaits on columella; lip finely toothed 

 inside. Length 2.5 mm. 



A rather common species but easily 

 overlooked on account of its extremely 

 small size. 



PI. 50, Fig. 15 



Florida; West Indies; Mediterranean 



MARGINELLA ADREOCINCTA Stearns. Whorls 

 five, sutures slightly impressed, spire el- 

 evated, outer lip well thickened; color 

 whitish with two amber colored bands; four 

 plaits upon columella. Length 4 mm. 



This very attractive minute shell 

 was dredged by the writer from mud bottom 

 and shallow water in Tarpon Bay, Sanibel, 

 Florida. Also it was taken in Barnes Sound, 

 Teatable Key and at Palm Beach. Though more 

 slender it is like a miniature M. denticu- 

 lata. It has been reported in from 3-44 

 fathoms. 



PI. 50, Fig. 24 



North Carolina to Gulf of Mexico 



MARGINELLA LACHRIMDLA Gould. A minute white 

 species with indistinct spire; lip slight- 

 ly toothed inside. Length 1.5 mm. 



Originally reported from off Georgia 



in 400 fathoms it may be secured upon the 

 shore at Sanibel during low tides. The 

 animal of translucent beauty is exceedingly 

 active and when extended much larger than 

 its diminutive shell. 



PI. 48, Fig. 8 



Georgia and Florida 



MARGINELLA AVENA Valenciennes. Surface 

 with three pale yellowish bands upon a milky 

 white ground; spire somewhat glazed; outer 

 lip slightly incurved at the middle; four 

 strong plaits on columella, the lower ones 

 slightly stronger. Length 12 mm. 



In Florida waters this little shell 

 lives under sponges in shallow water on the 

 Keys. 



PI. 50, Fig. 20 



Florida Keys; Texas; West Indies 



MARGINELLA CATENATA Montagu. Spire con- 

 cealed, covered by last whorl; aperture nar- 

 row, curved, wider below, fine plications 

 inside outer lip; heavy callus upon columel- 

 la, four strong plaits below and indistinct 

 ones above; color whitish with revolving 

 chain-like bands of brown or milk-white 

 markings. Length 3.5 mm. 



A Gulf of Mexico species, chiefly 

 Central American, taken by the author among 

 drift at Yamato, East Florida. 



PI. 50, Fig. 14 



Yamato, Florida to West Indies 



MARGINELLA LACTEA Kiener. Shell minute, 

 white, pale yellow banded, shining, translu- 

 cent, spire short, apex obtuse; four plaits 

 on columella; lip simple. Length 9 mm., 

 diameter 3.4 mm. Depth range 1-10 fathoms. 



PI. 49, Fig. 9 



Florida Keys and West Indies 



MARGINELLA PALLIDA Llnn§. Shell cylindri- 

 cal, yellowish white or yellow, translucent; 

 spire inconspicuous, four minute whorls, 

 apex brownish and shining, swollen; suture 

 distinct, base of aperture rounded, four 

 plaits on columella. Length 15 mm., major 

 diameter 7 mm., aperture 15 mm. Depth range 

 10-170 fathoms. 



PI. 50, Figs. 13, 16 

 Florida Keys and West Indies 



MARGINELLA OBLONGA Swainson. Shell flesh 

 color, faintly and broadly banded with a 

 darker shade; two chestnut spots on outer 

 lip; sometimes flecked with white. Length 



