1880.] NATURAL SCIENCES OF PHILADELPHIA. 373 



tendenc\^ to alternate in size ; the costte are arcuate, not in a 

 regular continuous series, those on the body-whorl extending 

 considerably below the middle of the whorl ; aperture about the 

 length of spire, the canal somewhat reflected ; columella covered 

 with a callous deposit, considerably twisted ; outer lip dentate 

 within. 



Length. 1 inch. Knight's Branch; Cave Branch, Clarke Co., 

 Alabama. 



This species greatly resembles the Fusus scalarinus of Deshayes 

 (Goquilles Fossiles, II, p. 574, PI. LXXIII, figs. 21 and 2S), but 

 may be distinguished by the lesser prominence of its costse, and 

 b}^ the presence of well defined striae over the entire surface of 

 the whorls. In this last respect, as well as in the subangulated 

 form of the whorls, it also differs from the Fusus acalariformis, 

 Nyst (CoquiUes et Poh/piers Fossiks, p. 504, PI. XL, figs. 5a, 6), 

 from Lethen, Belgium. 



TURBINELLA, Lamarck. 



Subgenus CARICELLA, r^onrad, 

 Turbinella (Caricelia) Bandoni, Desha}'ps, sp. PI. 20, fig. 15. 



The large species of Caricelia from Knight's Branch agrees sa 

 closely with the figures of Volata B a ndoni^ J) esh. (Animaux sans 

 Vertebres, Bassin de Paris, II, pi. 102, figs. 13 and 14), from the 

 Paris basin, that I do not feel justified in considering it a distinct 

 species. The American form ajipears to have been somewhat 

 more elevated, but this is probabl}^ no more than a varietal cir- 

 cumstance. 



Length, 4 inclies. Knight's Branch, Clarke Co., Ala. 



PLEUROTOMA. 

 Pleurotoma moniliata, n. sp. PI. 20, fig. 9. 



Shell fusiform, elevated, of about eight volutions, the whorls 

 considerably contracted above the shoulder ; whorls ornamented 

 with a double series of nodes, the lower much the most strongly 

 developed, which giA^es to the upper portion of the spire a monili- 

 form appearance ; surface of entire shell traversed by fine revolving 

 lines, which become more distant, very prominent, and alternate 

 on the median portion of the body-whorl ; aperture about the 

 length of spire ; the relative position of the upper and lower nodes 

 corresponds to the sinuous lines of growth. 



Length, 1 inch. Cave Branch, Clarke Co., Ala. 



