320 TRANSACTIONS OF THE WAGNER FREE 



evidently not immersed ; the three whorls succeeding the decollation nearly 

 smooth, gradually taking on faint spiral striation which in the later whorls 

 becomes a rather uniform series of sharp threads to the number of five or six 

 above the periphery, separated by wider interspaces; on the base the spirals 

 are still more sparse, except around the umbilicus ; transverse sculpture of 

 closer, fine, elevated lines most prominent in the interspaces and covering the 

 whole surface in harmony with the lines of growth ; whorls rounded and full, 

 except at the periphery, which is more or less distinctly angulated ; base con- 

 vex, with an obscure angle about its middle; umbilicus distinct, variable in 

 size, funicular, shadowed in front by the inner lip ; pillar arched, thin, some- 

 times with a slight callus near the anterior end ; aperture gibbously lunate, 

 effuse near the pillar, slightly angulated by the basal and peripheral angles ; 

 a thin wash of callus covers the body, the throat is smooth ; the suture is very 

 distinct and runs a little below the peripheral angle. Alt. of shell 7.5 ; max. 

 diam. 5 mm. 



This species has somewhat the aspect of a Trichotropis on account of the 

 effuse aperture and angulated periphery. As the nucleus is not immersed, it 

 is interesting as combining the broad form of Tiiba proper with the naked nu- 

 clear coil of the section Mathilda, thus illustrating the slight systematic value 

 which the characters relied on to separate the groups really possess. 



The genus Tuba in America is first known in the Eocene. Tuba bella 

 Conrad, from the Upper Cretaceous of Alabama, has been referred to Spiro- 

 neyna Meek, a. genus of Lztorimd(e. hea's type, T striata, is now known to 

 include both his other species, T alternata and sidcata, and, according to Con- 

 rad, is a synonym of the unfigured Littorina antiquata Conrad (Fos. Tert. 

 Form. U. S., No. 3, p. 35). Pasitliea cancellata H. C. Lea (Am. Journ. Sci. 

 xl. p. 93, pi. I, fig. 2, 1841) should also be referred to this genus. All the 

 preceding are from the Claibornian. From Jackson, Miss., Meyer has de- 

 scribed (Bull. Ala. Geol. Surv. i., 1886, p. 68, pi. 2, fig. i) an Eglisia regidaris 

 which he has since referred to the genus Mathilda. 



Family LITORINIDyE. 



Genus LITORINA F6russac. 



Litorina irrorata Say. 



Turbo irroraius Say, Journ. Acad. Nat. Sci. ii. p. 239, 1822. 



Litorina lineata Emmons, Geol. Rep. N. Car., pp. 256, 271, fig. 170, 1S5S ; not of Gmelin 



(young shell). 

 Litorina irrorata Tuomey and Holmes, Pleioc. Fos. S. Car., p. 119, pi. 26, fig. 5, 1857 ; ibid., 



Post-Pl. Fos., p. 91, pi. 14, fig. 5, 1S60. 

 Litorina carotinensis Conr., Proc. Acad. Nat. Sci. Phila. 1863, p. 567. 



Rare in the newer Miocene of South Carolina, Holmes ; in the upper 

 Miocene of Wilmington, N. C, near the Carolina Central R. R. station, Clark ; 

 Pliocene of De Leon Springs, Florida, B. H. Wright; Post-Pliocene of both 



