72 



EAST COAST MARINE SHELLS 



patches; about twenty raised fine lines on 



tip only, remainder of shell mostly smooth; 



deep narrow notch on convex side of tip. 



Length 25-35 mm. Range 2-87 fathoms. 

 PI. 65, Figs, 18, 18a 

 Cape Hatteras, North Carolina to 

 west Florida; West Indies 



DENTALIOM ENSICULUS Jeffreys. Shell fair- 

 ly strongly arched, slowly increasing in 

 diameter; keel on both convex and concave 

 sides; aperture flattened oval; grayish 

 white, oily in appearance rather than pol- 

 ished; no sculpture; notch wide. Length 

 19-30 mm. Range 193-1813 fathoms. 



PI. 63, Fig. 12 



Georges Bank to West Indies 



DENTALIUM ENTALE STIMPSONI Henderson. Mod- 

 erately curved; section round; surface dull 

 ivory white, more or less discolored; tips 

 much eroded; apical notch present. Length 

 33-38 mm. 



The American form is more chalky 

 and shows the faint sculptural features 

 more clearly than the European D. entale of 

 Linnaeus. 



PI. 55, Fig. 14 



Maine to Cape Cod, Massachusetts 



DENTALIUM GODLDII Dall. Shell six sided; 

 slightly curved, regularly tapering; sur- 

 face shining; six pinched up rod-like ribs, 

 microscopically fine lines between flat 

 spaces; hexagonal section less apparent at 

 aperture or larger end. Length 29 mm. 



Allied to D. texasianum. In Flor- 

 ida it lives in shallow water or moderate 

 depths. The variety obscurum is illikstrat- 

 ed. 



PI. 63, Fig. 4 



Florida; edge of Gulf Stream off 



the Carolinas and Georgia 



DENTALIUM LAQUEATUM Verrill. Primary ribs 

 nine to twelve, intercostal sculpture of 

 latticed design. Length 45-62 mm. Range 

 10-193 fathoms. 



Abundant in sandy mud along edge of 

 Gulf Stream in Florida Keys region, espe- 

 cially off Fowey Light. 



PI. 63, Fig. 2 



Cape Hatteras region to Barbados; 



Gulf of Mexico 



DENTALIUM OCCIDENTALE Stimpson. Color dir- 

 ty white, occasionally ivory; surface lus- 



treless; sixteen sharply defined riblets, 

 better developed upon posterior portion; 

 apical notch often obscure. Length 34 mm. 



Found in cold off shore water in 

 depths varying from 20-1,000 fathoms. 



PI. 55, Fig. 16 



Newfoundland to Cape Hatteras, 



North Carolina 



DENTALIUM PERLONGUIJI Dall. Extremely long 

 and slender, slightly arched or almost 

 straight; long needle-like tip, opaque 

 white, porcellanous but not highly polished; 

 no sculpture, a smooth cylinder; notch var- 

 iable. Length 54-90 mm. Range 11-1,181 

 fathoms. 



Fresh specimens have been taken in 

 shallow water in west Florida. 



PI. 63, Fig. 6 



Cape Hatteras to Gulf of Mexico, 



south to Rio de la Plata 



DENTALIUM SEMISTRIOLATUM Guilding. Trans- 

 lucent white with milky patches, highly 

 polished, often reddish toward apex; slen- 

 der, regularly curved; fine regularly spaced 

 grooves upon portions of shell, remainder 

 smooth; long narrow slit near apex not 

 present in all individuals. Length 25-34 

 mm. 



An abundant shore species especial- 

 ly in the Lesser Antilles and the west 

 coast of Florida. 



PI. 55, Figs. 13, 17 



Florida; West Indies 



DENTALIUM TEXASIANUM Philippi. Shell slow- 

 ly increasing in diameter; hexagonal in 

 section; color dull grayish white, opaque, 

 strong and solid; tip hexagonal, angles be- 

 coming rod-like ribs with flat spaces be- 

 tween; one to two, rarely three riblets be- 

 tween major ribs. Length 21 mm. without 

 tip (a Sanibel specimen) . 



This shell has not been reported 

 from the Florida oast coast or Florida Keys, 

 nor the Antilles. 



PI. 55, Fig. 19 



Beaufort, North Carolina; West 



Florida; Louisiana; Texas 



Family Siphonodentaliidae 



GENUS CADULUS Philippi 1844 



Small white shells, lacking sculp- 

 ture, often swollen or with a bulging area; 



