78 TRUNCATELLINA. 



12. TRUNCATELLINA ODONTOSTOMA (Westerlund). 



Shell cylindric, closely and regularly striate, horn-yellow, 

 obtuse. Whorls 6, convex, the last somewhat larger, ascend- 

 ing in front, almost without a crest near the aperture. Aper- 

 ture semi-oval, with one punctiform tooth deep within on the 

 parietal wall and one drop-shaped tooth high up in the palate, 

 near the suture and rather far from the outer Up. Peristome 

 thin. Columellar margin expanded and reflected. Length 

 2%, diam. % mm. (West.). 



Norway : near Christiania, on the Aakershuus farm. 



Pupa minutissima Hartm., [var.] g, odontostoma WESTER- 

 LUND, Malak. BL, xxii, 1875, p. 132 ; Fauna Europsea, 1876, 

 p. 191 ; Fauna Pal. Beg. etc., iii, 1887, p. 128. BOETTGER, 

 Nachrbl., 1879, p. 66. Pupa (Isthmia) odontostoma WEST., 

 Jahrb. d. Mai. Ges., x, 1883, p. 61. Isthmia odontostoma 

 WEST., Syn. Moll, extramar. Reg. Pal., 1897, p. 112. 



The position of the palatal tubercle as described by Wes- 

 terlund appears abnormal; yet he seems to have had more 

 than one specimen, as the number of whorls is given as 6-7 

 in his latest description. He places the species among those 

 in which the palatal tooth is not visible in a direct front view. 

 In Malak. Blatter, xxii, p. 126, Westerlund says "Tirolia, 

 Norvegia," but in later notices he ignores the former locality. 



Boettger (1878) states that it is widely distributed in 

 France; it has a little punctiform parietal tooth near the 

 opening, and a palatal tooth placed as in strobeli. He con- 

 siders it, apparently, a variety of minutissima [cylindrica] ; 

 but whether he actually had Westerlund 's shell remains 

 doubtful. Perhaps he had the form herein described as T. 

 brittanica. 



13. TRUNCATELLINA COSTULATA (Nilsson). PL 8, figs. 17, 18. 

 The shell is rimate, cylindric with very short obtuse sum- 

 mit, regularly finely costulate, chamois-colored, glossy. The 

 whorls are strongly convex, the last rapidly tapering towards 

 the base, having a massive, whitish crest behind the lip. Su- 

 ture impressed, rising to the lip. Aperture broadly ovate or 

 squarish. Parietal lamella long, entering deeply. Columellar 





