88 



EAST COAST MARINE SHELLS 



ear-shaped, outer lip thin; columella 

 twisted with an oblique fold sllghitly above 

 its Insertion. Length 5.8 mm., diameter 

 2 mm. 



The unique holotype was taken at 

 the following locality. 



PI. 34, Fig. 1 



Branford River, Connecticut 



PYRAMIDELLA ENGONIA TERES Bush. 

 PI. 65, Fig. 9 



GENUS TURBONILLA Rlsso 1826 



Many whorled, usually slender, sin- 

 gle fold upon columella, outer lip contin- 

 uous; usually larger than Odostomla and 

 smaller than Pyramldella. 



TURBONILLA CURTA Dall. Shell waxen white, 

 nine to ten Inflated whorls; nucleus sinis- 

 tral; last whorl with about twenty-five 

 close-set rounded ribs, extending from su- 

 ture to suture, but little curved; no spi- 

 ral sculpture; base almost smooth; surface 

 polished; suture distinct. Length 8.3 mm. 



Dead but fresh examples are not 

 rare upon the Sanibel beach. Range 15-640 

 fathoms. 



PI. 34, Fig. 5 



North Carolina to Gulf of Mexico 



TURBONILLA AREOLATA Verrlll. "Shell obe- 

 lisk-shaped, light yellow, nuclear whorls 

 very small; postnuclear whorls almost flat, 

 crossed by strong low axial ribs, ranging 

 from twenty on the first to twenty-six upon 

 the penultimate turn. The spiral sculpture 

 consists of five rows of pits which cross 

 the spaces but not the ribs; periphery of 

 last whorl smooth, except faint continua- 

 tions of ribs; outer lip thin, showing ex- 

 ternal sculpture within; columella slightly 

 curved." Length 5.1 mm. Range 2-8 fathoms. 



PI. 34, Fig. 8 



Vineyard Sound to Long Island Sound 



TURBONILLA RETICULATA C. B. Adams. Smaller 

 than T. Interrupta; spiral sculpture with 

 aspect of threads rather than grooves; 

 twenty-six to thirty ribs stepping at 

 periphery, sometimes faintly visible in 

 front of it; columella simple, twisted and 

 straight, often with distinct plait. Length 

 2.5 mm. 



North Carolina to West Indies 



TURBONILLA CONRADI Bush. Shell waxen gray 

 or yellowish; regularly colled; twelve 

 whorls in addition to the flattened nucleus 

 which Is transverse to the axis; suture dis- 

 tinct, a little undulating; transverse ribs 

 twenty- two, broad, rounded, slightly ob- 

 lique, spaces between ribs wider and shal- 

 lower, the latter crossed by conspicuous 

 Incised lines, the lines becoming deep 

 grooves above suture; base well rounded 

 with three incised spiral lines and other 

 smaller ones; columella straight, thickened, 

 well reflected. Length 8.5 mm. 



PI. 34, Fig. 3 



Tampa Bay to Tarpon Bay, Florida 



TURBONILLA HEMPHILLI Bush. Allied to T. 

 dalli but more slender, longer, apex more 

 pointed, whorls less convex, nucleus small- 

 er, ribs more numerous; twelve whorls in 

 addition to the small nucleus; transverse 

 ribs about twenty, nearly perpendicular, 

 rounded, equally wide deep spaces between; 

 base rounded and smooth; surface covered 

 with fine striae. Length 9 mm. 



PI. 34, Fig, 6 



Sarasota Bay to Sanibel, Florida 



TURBONILLA INTERRUPTA Totten. "Shell slen- 

 der, pale wax yellow; postnuclear turns 

 quite high between sutures; low axial ribs 

 a little wider than the spaces between, 

 ribs Increasing from twenty to twenty-four 

 upon the penultimate turn, also 11-14 deep 

 spiral lines, all except the one upon the 

 periphery equal in strength and spacing, 

 the one immediately above periphery much 

 heavier and forming a line of deep pits; 

 peripheral band of last whorl free from 

 sculpture except for faint continuations 

 of the axial ribs, well rounded; base short, 

 well rounded, with eight equally-spaced 

 and strong cut spiral lines; aperture sub- 

 quadrate, outer and basal lip thin; columel- 

 la slightly curved and weakly reflexed." 

 Length 5.7 mm. Range 2-107 fathoms. 



PI. 34, Fig. 2 



Casco Bay, Maine to West Indies 



TURBONILLA WINKLEYI Bartsch. "Shell wax 

 yellow; axial ribs twenty-two on the first, 

 increasing to twenty-two upon the penulti- 

 mate turn; spaces between of varying width; 

 base short, rounded, marked by feeble con- 

 tinuations of the axial ribs and about 

 fifteen feeble wavy strlatlons; columella 



