EAST COAST MARINE SHELLS 



113 



white, marked with brovra, often banded. In- 

 terior dark, aperture white, Length 2 inch- 

 es. 



PI. 42, Fig. 7 



Florida Keys and West Indies 



SECTION LINATELLA 



In form and sculpture the species 

 placed under this section approach the Ton- 

 nidae. 



CYMATIUM CINGULATDM PENINSULUM Maxwell 

 Smith. Surface and interior whitish; nvim- 

 erous revolving ribs, yellowish brown in 

 color, the ribs alternating in size, wide 

 and narrow; sutures well marked; termina- 

 tions of deepest grooves between ribs 

 marked with orange brown on outer lip; ca- 

 nal short and oblique, whorls 4.5; epider- 

 mis rather heavy; operculum small. Length 

 2.75 inches. 



One living example has been col- 

 lected in Lake Worth and a number of fresh 

 dead specimens. It may eventually be found 

 as far north as Cape Hatteras. The typical 

 shell occurs in the West Indies and Central 

 America. On PI. 44 a specimen of the vari- 

 ety is shown with the epidermis and opercu- 

 lum. 



PI. 1, Fig 2 



PI. 44, Fig. 5 



Lake Worth, Florida 



SUBGENUS MONOPLEX Perry 1811 



CYMATIUM COSTATUM Born (T. olearium of au- 

 thors) . Shell light brown, varices and lip 



marked with brown; 

 ribs often in pairs, 

 sometimes broken by 

 granules; epidermis 

 _^^ thin and partly hair- 

 •Tuim^Rr»'%" like, shown in Fig. 47. 



PI. 42, Figs.l, 

 2 



Cape Hatteras, 

 North Carolina 

 to West Indies 



GENUS CHARONIA Glstel 

 1848 (Septa Perry 1811) 



CHARONIA TRITONIS NO- 

 Fig. 47 BILIS Conrad. A fine 

 Cymatium costatum, large shell, brilliants 

 showing hairy epidermis ly painted with red 



and brown. This variety is heavier, short- 

 er and more shouldered than the typical 

 which lives in the Indo-Pacific region. 

 Length 16 inches. 



PI. 1, Fig. 3 



Palm Beach County, Florida to West 



Indies 



GENUS DISTORSIO Roeding 1798 

 (WRITHING SHELLS) 



Aperture contracted and toothed, 

 narrow; columella reflected upon last whorl. 



DISTORSIO CLATHRATA Lamarck (D. reticulata 

 Link) . Shell whitish under a velvety yel- 

 lowish-brown epidermis; canal long; surface 

 divided into squares by the strong ribs; 

 columella plait and lip varying from light 

 to dark salmon color. Length 1.25 inches. 



An off-shore shell which has been 

 taken living at certain times of the year 

 in Lake Worth, Florida, also upon the beach- 

 es. Depth range 22-124 fathoms. 



PI. 42, Fig. 8 



Lake Worth, Florida to West Indies 



GENUS GYRINEUM Link 1807; Ranella, 

 Lamarck in Part (FROG SHELLS) 



Shell nodulous, two rows of varices 

 opposite each other; outer lip toothed, in- 

 ner one wrinkled; canal at base short, -usu- 

 ally reflexed; operculum horny. 



GYRINEUM AFFINE CUBANIANUM Orbigny. Shell 

 yellow or flesh-colored, often rose tinted 

 near apex; surface spotted- with brown or 

 red. The angles and tubercles vary in dif- 

 ferent individuals. Length 1.75-2.5 inches. 

 It has been collected on the Dry Tortugas. 



PI. 43, Fig. 8 



North Carolina to West Indies 



GYRINEUM CRUENTATUM Reeve (Ranella thomae 

 Orbigny?) . Shell short, yellowish or brown- 

 ish white, often spotted with red; revolving 

 ridges with tubercles, those on the periph- 

 ery the strongest; posterior canal small, 

 anterior canal reflexed; aperture white or 

 purple, often with reddish spots on inside 

 wall. Length 1 inch. 



A fresh beach specimen was taken at 

 Boynton, Florida, apparently the first rec- 

 ord for the United States. 



PI. 42, Fig. 6 



Boynton, Florida to West Indies 



