1921] NATURAL SCIENCES OF PHILADELPHIA. 377 



No internal septa were seen in these specimens. The erect, nearly 

 straight portion is cylindric, and has about 12 spiral ridges, and 

 close, fine circular striae. Diameter 4.5 mm. A larger specimen 

 with more slowly revolving spirals has a diameter of 5.2 mm. No. 

 2812 A. N. S. P. It was referred to V. decussatus Gmel., by Gabb 

 (I. c. p. 240). 



Vermetus (Petaloconchus) domingensis Sowb. 



Pelaloconchus domingensis Sowb., J. Geol. Soc. Lond., vi, 18, p. 51, pi. 10, 



fig. 9. 

 Pelaloconchus sculpturatus H. C. Lea, Gabb, Tr. Am. Philos. Soc, xv, p. 240. 



This is the most abundant species of the family in Gabb's col- 

 lection. We think it a subspecies of V. sculpturatus Lea. 



TURRITELLIDAE. 



Turritella perattenuata praecellens Pils. and Brn. 



Turritella perattenuata praecellens P. and B., Proc. A. N. S. Phila. 1917, p. 36. 



pi. .5, fig. 12. 

 Turritella tornata Guppy, in part, Gabb, Tr. Am. Philos. Soc, xv, p. 240 



Not of Guppy. 



The type (broken) and parts of two other specimens are no. 2608 

 A. N. S. P. 



Turritella tornata Guppy. 



Turritella tornata Guppy, Q. J. Geol. Soc, xxii, 1866, p. 580, pi. 26, fig. 12 

 Gabb, Tr. Am. Philos. Soc, xv, p. 240, (in part). 



Seventeen specimens, more or less imperfect, represent this species. 



Guppy 's figure is from one of the most distinctly granose examples. 



Turritella calostemma Pilsbry and Brown. 



Turritella calostemma P. and B., Proc. A. N. S. Phila., 1917, p. 36, pi. 5, fig. 15. 



Between Las Caobas and Thomonde, Haiti; not yet found in Santo 

 Domingo. 



Type no. 2610 A. N. S. P.; also no. 2609. 



Turritella megalobasis Dall. 



Turritella exoleta Linn., in part, Gabb, Tr. Am. Philos. Soc, xv, 1873, p. 240. 

 Turritella megalobasis Dall, Pilsbry and Brown, Proc. A. N . S. Phila., 1917 

 p. 36, pi. 5, fig. 14. 



A broken specimen 42.5 mm. long, of somewhat over 4 whorls, 



has a basal diameter of 20.4 mm. The last whorl has a peculiar 



sculpture, figured by Pilsbry and Brown. 



