EAST COAST MARINE SHELLS 



101 



Length 18 nun. 



PI. 37, Fig. 9 



North Carolina to the West Indies 



and Gulf of Mexico 



Family Lacunidae 



Shell thin, few whorled; inner lip 

 oblique; umbilicus forming a groove. 



GENUS LACUNA Turton 1827 

 (CHINK SHELLS) 



LACUNA VINCTA Montagu. Superior Chink. 

 Shell small, whorls five; four to five 

 bands; suture well impressed; outer lip 

 thin; operculum horny. Length 6-12 mm. 



Often found among roots pf Lami- 

 naria and other marine plants, also on 

 rocks and shells thrown on the beaches by 

 storms. It lives in 1-120 fathoms, 



PI. 31, Fig. 15 



PI. 71, Fig. 19 



Labrador to New Jersey. 



LACUNA VINCTA FUSCA Gould. Dark Chink. 

 Shell shorter, darker, stronger and more 

 uniform in color than the typical; some- 

 times with one to two bands or dark areas; 

 the revolving ridges more prominent. 



It is often yellowish or purple in 

 color, 



Maine to Connecticut 



LACUNA PALLIDULA NERITOI- 

 DEA Gould. Pale Chink. 

 Whorls 3.5, the last very 

 large; epidermis rough, 

 greenish yellow; outer lip 

 sharp, the inner like a 

 rounded white rib, twisted 

 behind; umbilicus deep. 

 Length 5 mm. 

 Found on seaweed floated ashore, 

 near Swampscott, Massachusetts and else- 

 where. Fig, 42. 



Greenland to Connecticut. 



Family Turritellidae 



Spire of shell very long, many 

 whorled; lip not thickened; operculum spi- 

 ral. 



Fig. 42 

 Lacuna peillida 

 neritoidea, 

 5 mm. 



GENUS TURRITELLA Lamarck 1799 

 (TURRIT SHELLS) 



SECTION HAUSTATOR 



TURRITELLA VARIEGATA Linne. Variegated 

 Turrit. Shell solid, apex acute, color 

 white or purplish brown, often with reddish 

 striations; whorls fifteen to sixteen, 

 spirally lined; suture deep, subchannelled, 

 aperture quadrangxilar, lip simple. Length 

 80-90 mm, 



PI, 37, Fig, 14 



Texas and West Indies 



SECTION TORCULA Gray 1847 



TURRITELLA EXOLETA Linne. Plain Turrit. 

 Shell white or yellowish white, flamed with 

 brown; whorls sixteen to seventeen, a por- 

 tion concavely excavated; suture well 

 marked; lower rib upon body whorl double; 

 lip simple. Length 50-60 mm. Depth range 

 45-170 fathoms. 



PI. 28, Fig. 9 



Florida Keys; Gulf of Mexico; West 



Indies 



TURRITELLA SUBANNULATA ACROPORA Dall , Length 

 1 inch. Depth range 3-413 fathoms. It 

 has been taken, rarely, on the Sanibel 

 beach, 



PI. 28, Fig, 8 



North Carolina to Gulf of Mexico; 



West Indies 



GENUS TURRITELLOPSIS G, 0. Sars 1878 



TURRITELLOPSIS ACICULA Stimpson. Shell 

 small, white, thin; longitudinally striate 

 and surrounded by transverse ribs, three of 

 these being the strongest; aperture round- 

 ed, lip acute. Length 6 mm. Depth range 

 1-50 fathoms. 



PI. 33, Fig. 5 



Labrador to Massachusetts Bay 



GENUS TACHYRHYNCHUS Morch 1868 



TACKYRI-'YNCHUS EROSA Couthouy. Shell pale 

 brown; ten whorls, grooved with three to 

 five blunt furrows; apical whorls oftep 

 eroded or broken off; aperture almost cir- 

 cular. Length 25 mm. The animal is shown 



