PAGODULINA. 175 



2c. Pagodulina subdola adamii (West.) PI. 21, figs. 1, 2, 3. 



The last whorl is very closely, vertically and finely striate, 

 the rest rather widely spaced, obliquely and strongly, fine- 

 ribbed, the last whorl with a shallow impression in the middle, 

 hardly as wide in front as behind. Aperture obliquely drawn 

 out to the right, triangular, wide above, much narrower and 

 rounded below ; outer lip strongly impressed above the middle 

 (Westerlv/nd) . 



A topotype received from Boettger is figured. The striation, 

 fine and close on the last half-whorl, elsewhere rather wide- 

 spaced, does not differ materially from that of typical pago- 

 dula. On the face of the penult whorl there are 7 or 8 riblets 

 in 1 millimeter. Internally there is the usual long upper- 

 palatal fold within the ventral wall of the last whorl, but 

 this fold differs from that of P. pagodula by being much 

 higher in the middle, tapering towards both ends. Below the 

 middle there is a short lower-palatal fold, and further in, 

 above the upper-palatal, there is a delicate supra-palatal 

 fold. All of these are visible from outside, through the 

 shell. The spiral lamella on the parietal wall is well de- 

 veloped. The vertical columellar lamella forms a broad plate, 

 tapering and turned inward at its upper end, but only very 

 weakly notched below, where it runs out on the basal wall 

 further than in other forms of P. subdola. Externally, within 

 the umbilical cavity, there is a short, radial furrow marking 

 the position of the base of the columellar lamella. The spiral 

 lamella (on the upper or parietal wall within the ventral 

 side) is long and strong, and it is accompanied by a lower, 

 shorter lamella, further out, near the suture. These two 

 lamella? are immersed representatives of the parietal and the 

 angular lamella? of ordinary Pupillidae. Thus there are three 

 lamellae and three palatal folds, or six in all, being two more 

 than in P. subdola, and three more than in P. pagodula. 



Length 3.3, diam. above aperture 1.9 mm. ; 8y 2 whorls. 



Italy: Edolo, in northeastern Lombardy (Adami). 



Pupa pagodula var. adamii Westerlund, Fauna Palaaret. 

 Reg. Binnenconch. iii, 1887, p. 91. 



[Pupa pagodula var.] perplicata Sterki, Nachrbl. D. Malak. 

 Ges. xxvi, August, 1894, p. 134. 



