350 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



COLUMBELLIDAE. 



Columbella inflata (Gabb) Plate XVIII, flg. 14. 



Strombina inflata Gabb, Tr. Am. Philos. Soc. xv, 1873, p. 221. 



This species is distinguished by its inflated form, the last four 

 whorls being subangular near the suture. There is a very broad, 

 low varix occupying the last fifth of the last whorl, giving it a gib- 

 bous appearance, then contracting to the lip. 



Length 25.6, diam. 13.4 mm. 



The type is no. 3287 A. N. S. P. One specimen only. 



Anachis exilis (Gabb) Plate XVIII, flg. 13. 



Strombina exilis Gabb, Tr. Am. Philos. Soc, xv, 1873, p. 222. 

 Anachis exilis Gabb, Dall, Tr. Wagner Free Inst. Sci., iii, p. 139. 



The whorls have about 15 straight axial ribs, the last one with 

 spiral cords on the anterior third. Over a small area behind the lip- 

 varix the axial ribs are effaced except near the suture. 



Length 4.3, diam. 2 mm. 



Type no. 2807 A. N. S. P. Twelve other specimens. 



Anachis gracilicostata Pils. and Johns. Plate XVIII, flg. 17. 



Proc. A. N. S. Phila., 1917, p. 168. 



Anachis (?) quadrata (Gabb) Plate XVIII, flg. 8. Te.xt-flg. 16. 



Fusus quadratus Gabb, Trans. Amer. Philos. Soc. xv, 1873, p. 204. 



The smooth embryonic shell has 2| whorls. 

 First post-nuclear whorl has 10 rounded ribs, 

 after which the ribs rapidly become more widely 

 spaced, until on the last whorl there are five, and 

 in a basal view (text fig. 16) the shell has a square 

 outline. There is no bend in the delicate growth- 

 lines to indicate a posterior sinus, though the aper- 

 Basal outline ^ure otherwise has a Drillia-\ike appearance. In 

 oi A. quadrata. ^he concavity below the periphery there are fine 

 spiral striae. The columella is broad with rounded face. 

 Length 8.7, diam. 4 mm.; 8 whorls. 

 Type no. 3234 A. N. S. P. 

 The generic place of this strongly marked little shell is uncertain. 



Strombina caribaea Gabb. Plate XVIII, flg. 9. 



Strombina caribaea Gabb, Tr. Am. Philos. Soc. xv, 1873, p. 221. 



This species has a slender, acuminate spire. The surface is 



smooth except on the narrow anterior part, which has about 12 



spiral cords. The lip has a very heavy varix, and six large and sev- 



