138 AGARDHIA. 



not found it up to 1910; but Bourguignat 's record from a 

 Pleistocene or Holocene deposit near Vence is authentic so 

 far as I know, but seems suspicious in view of the fact that 

 A. blanci is also reported from that place. This is the only 

 definite locality for A. ferrari in France, and is a long dis- 

 tance from any known Italian or Swiss locality. 



Flach, who collected many A. ferrari on the Comersee noted 

 a wide range of variation in shape of the shell, of the aper- 

 ture, and in the teeth, the sculpture and number of whorls 

 being more constant. He considered A. blanci a form of 

 ferrari. 



Bernhardt thus described the young shell : 



Young specimens of Pupa ferrari Porro are very similar to 

 those of P. pagodula with which they occur; having the char- 

 acteristic Solarium shape with widely open umbilicus. The 

 striation, sharper than in P. pagodula, begins on the first 

 whorl immediately after the smooth nucleus. The shell is at 

 first quite colorless, glassy-clear, and only gradually takes on 

 a light yellowish brown tint. Of the columellar fold nothing 

 is seen ; but on the base of the temporarily last whorl there 

 is a relatively wide, white spiral band, a little raised, and 

 without thickenings or projections, traceable about a whorl 

 inward and with a double-edged appearance. In preceding 

 whorls it is absorbed. 



2. Agardhia blanci (Bgt.). PL 17, figs. 3, 4, 5. 



Shell deeply per\ious-umbilicate, cylindric, obliquely hair- 

 costulate, especially on the last whorl, the apex smooth, very 

 obtuse. Nine slightly convex whorls, regularly and slowly in- 

 creasing, separated by an impressed suture, the last whorl 

 not descending but rather slightly ascending, compressed- 

 contracted, grooved near the lip and at base, and acutely 

 carinate below around the umbilicus. Aperture nearly ver- 

 tical, contracted, sinuous, angular above, somewhat channelled 

 below ; 5-toothed, as follows : one strong, straight, deeply 

 placed parietal lamella; one stronger immersed lamella on 

 the upper part of the columella ; two deeply immersed palatal 

 folds, of which one above is punctiform, scarcely visible, the 

 other below is lamelliform ; on the outer lip a thick triangular 

 tooth. Outer lip sinuous, arching forward ; columellar margin 



