46 ANNALS NEW YORK ACADEMY OF SCIENCES 



soma or the recent C. tuberosum and resembles in that respect C.adansoni. 

 It may be the American representative of the Miocenic ancestor of the 

 latter species rather than a member of the direct line toward C. tuber- 

 osum. 



2. Vulgocerithium 



Specimens of Vulgocerithium vulgatum are reported by Homes and 

 Partsch [1856, p. 388] from the Miocenic of Italy and the Vienna Basin. 

 The species seems to persist through the Miocenic and Pliocenic to recent 

 time. 



Homes and Partsch describe several other species which are evidently 

 closely related to V. vulgatum. 



Vulgocerithium minutum Serves 



This species is recorded by Homes and Partsch [1856, p. 390] from 

 the Miocenic of the Vienna Basin. Specimens have been obtained from 

 the upper Oligocenic of Saucats, and the species is described with others 

 from that horizon. The Oligocenic specimens differ from the figures of 

 Homes and Partsch [1856, plate 41, figs. 8, 9] in their smaller size and 

 the less prominent nodes of the median row. 



Vulgocerithium zelebori Homes and Partsch 



1856. Ccrithium zeJehori Hornes and Partsch, Abhaud. der k. k. geol. Reicb- 

 sanstalt. III, 391, pi. 41, fig. 10. 



This species seems to be closely related to V. minutum, differing in the 

 more rounded nodes, less continuous ribs and the greater distinctness of 

 the sub-sutural row of nodes. The young stages are not described in 

 detail, and the figures are not sufficiently enlarged to show them clearly, 

 but the general form, aperture and surface ornamentation are so similar 

 to those of V. vulgatum that they may be referred to the same group with 

 a high degree of probability. 



Vulgocerithium doliolum Brocchi 



1814. Ccnthium doliolum Brocchi, Concbiologia fossile subappen., II, 442, pi. 



9, fig. 10. 

 18.50. Cerithiuw doHnlum Hornes and Partsch, Abhand. der k. k. geol. Reicb- 



sanstalt, III, .392, pi. 41, fig. 11. 



Hornes and Partsch record this species from the Miocenic of Italy and 

 the Vienna Basin. It has a somewhat shorter spire than most species of 

 Vulgocerithium, but it is similar to shells of this group in the character 



