214 TERTIARY VERTIGININAE. 



Vertigo guadalupensis Fer., Tabl. Syst. p. 64, no. 6 "(4 

 deiitata ) . Habit. La Guadeloupe. ' ' 



Vertigo cylindrica J. Colbeau, Aim. Soc. Malac. Belgique 

 iii, 1868, p. 97, pi. 2, fig. 7. Shell cylindro-couic, yellowish 

 brown, glossy, the growth-striae quite noticeable, 5-6 whorls, 

 the first very small, the later ones nearly equal ; aperture small, 

 oval, longer than wide, without teeth. Length 1%, diam. 

 about 1 mm. 



Colbeau remarks that the unique example of this shell he 

 formerly regarded as a variety or anomaly of V. pygmaa, not 

 adult. The aperture is relatively smaller than in V. 

 muscorum [Drap., non L.] and edentnla; it is larger and more 

 glossy than muscorum, smaller and darker colored than eden- 

 tnl. From Belgium. The figure is copied, pi. 17, fig. 8. 

 May be a Truncatellina or an abnormal V. pygmaea. 



Vertigo subtrochiformis de Gregorio (pi. 17, fig. 7). Shell 

 very minute, pupoid, subtrochiform, the last whorl a little 

 angular, aperture small, subrotund. Length 2 mm. Perhaps 

 this is a variety of the preceding ["Pupa muscorum," a 

 Truncatellina} having the last whorl broken and the spire 

 a little wider. I have only one specimen (Vertigo subtrochi- 

 formis de Greg., Annales de Geol. et de Paleont., 32 livr., Feb., 

 1907, p. 8, pi. 1, f. 17). 



Italy : Abano, found in mud from a hot spring. The figure 

 is obviously inexact, and looks like anything but a Vertigo. 

 Generic position dubious; though not so absolutely hopeless 

 as some other generic references in the same paper, such as 

 the "Glandina" and " Melanopsis." 



IV. FOSSIL SPECIES OP VERTIGO AND OTHER VERTIGININAE. 



Vertiginmae are common as Pleistocene fossils, which in this 

 work are included with the recent species. 



A few Eocene species described as Pupa are probably Ver- 

 tigininae, but the only one of which the apertural character 

 is known has no teeth. As this is undoubtedly a secondary 

 condition, such a form could not be ancestral to the modern 

 genera, and it was probably an end-product of evolution from 

 some toothed genus of the Palaeocene or Mesozoic. 



