-H" 46 



MARGINELLA CONSTRICTA. Tab. 16, fig. 16. 



Narrow, somewhat elliptical ; spire rather elevate'd, pointed ; 

 columella with 3 plaits ; labrura acutely angular above. 

 Locality. Claiborne, Alab. Extremely rare. 



CREPIDULA LIRATA. Tab. 16, fig. 17. 



Oblique, elevated, compressed, with longitudinal irregular cos- 

 tae and transverse wrinkles ; beak much produced, curved forward 

 and laterally, subspiral at the apex; cavity very profound; aper- 

 ture oblong ; margin of the diaphragm arcuated. 



Syn. C. CORNU ARIETIS, Lea, Con. p. QT,pl. 3,/. 77. 



Locality. Claiborne, Alab. 



One of the most abundant fossils at Claiborne. It was. published 

 originally in the Amer. Journ. Science and Arts, v. 23, p. 344. 



CREPIDULA DUMOSA. Tab. 16, fig. 20. 



Convex, with longitudinal ribs alternated in size, the larger ribs 

 armed with short erect spines ; beak laterally curved, subspiral. 



^Locality. Claiborne, Alab. 



In having spines, this shell resembles the recent C. aculeata of 

 the West Indies, and the Pliocene fossil, C. costata, Morton. 



INFUNDIBULUM TROCHIFORMIS. Tab. 16, fig. 21*. 



Orbicular, convex or subconical, spinous ; vertex subcentral, 

 smooth ; spire conspicuous. 



Syn. CALYPTREA TROCHIFORMIS, Lam. An. des Mus. v. 1, p. 

 385, and v. 7, pi. 15, fig. 3. Deshayes, Coq. Foss. v. 2, pi. 4. 

 . INFUNDIBULUM ECHINULATUM, I. SPINULOSUM, I. TUBERCULA- 

 TUM, Sow. v. I, pi. 97, fig. 1, 2, 7. 



Locality. Claiborne, Alab. 



In No. 3, first edition, I gave it the name of I. urticosum, but 

 I no longer consider its identity with the Paris species doubtful. 

 Mr Lea calls it I. trochiformis, thus giving it the name of La- 

 marck's shell, yet describing it as a new species ! 



Misprint for "fig. 18." G. D. II. 



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