AGARDHIA. 165 



Pupa (Sphyradium) truncatella var. biarmata 0. Boettger, 

 19r.-21r. Bericht Offenbacher Vereins f. Naturkunde, 1880, p. 

 109. — Coryna biarmata Bttgr., Sturany, Nachrbl. D. M. Ges., 

 vol. 36, July 1904, p. 105, text-figs. — Agardhia (Agardhia) 

 truncatella biarmata Bttg., Sturany and Wagner, Denkschr., 

 vol. 91, 1914, p. 65, pi. 18, f. 104a-c. 



Dr. Sturany has given figures (which we reproduce in pi. 

 19, figs. 11, 12) and the following notes on this species: 



The cylindric, stab-like umbilicate, pale yellow colored 

 shell consists of 7 whorls, of which the first 2 to 2^ are 

 smooth, the rest provided with numerous transverse riblets, 

 placed a little obliquely. In shape, sculpture and build there- 

 fore agreeing with P. truncatella, Pfr. ; but distinguished 

 principally from this form by the dentition of the aperture. 

 There is here one tooth on the outer margin and a lamella on 

 the parietal wall. The margins of the peristome are con- 

 nected by a parietal line on which the riblets of the preceding 

 whorl end button-like. The outer margin as well as the colu- 

 mellas* margin is arcuate and curved forward. The columella 

 has 2 or 3 little teeth deep within, which stand on a project- 

 ing welt and are thus visible in an oblique view in the mouth. 

 Length of the shell 4, breadth 1.7 mm. 



Dr. Boettger was so good as to bring Pupa truncatella var. 

 biarmata Bttgr. to my attention and intrust to me one of his 

 original specimens for comparison, so that I could convince 

 myself of their identity. I publish here the new locality, and 

 at the same time follow Boettger 's hint in understanding 

 biarmata as a separate species, no longer a variety of trun- 

 catella. 



In the last consideration of biarmata, by Sturany and Wag- 

 ner, it is ranked as a subspecies of truncatella. The aper- 

 tural armature is said to be variable: there are generally 

 three rather short dentiform folds on the parietal wall, but 

 sometimes the two outer ones are lacking, sometimes some 

 may be doubled. On the columella there are 1, 2 or 3 folds, 

 which likewise become indistinct sometimes (figures 9, 10, re- 

 produced from S. & W. ) . 



The specimens I have seen, pi. 19, figs. 13, 14 (from Ko- 

 meno near Castelnuovo, Dalmatia [Hesse coll.]), appear to 

 differ constantly from A. truncatella by the more distinctly 

 developed lip-tooth, though agreeing with that form in sculp- 

 ture. 



