62 TRUNCATELLINA. 



The Abyssinian species are still known solely by Jickeli's 

 excellent work. 



Most South African forms were at first inadequately or 

 incorrectly described and figured, but Burnup has brought 

 them to scientific knowledge by clear descriptions and excel- 

 lent figures. 



"P. sitella Kstr. Mscr., Triest" was mentioned by Wester- 

 lund, Malak. Blatter, xxii, 1875, p. 126, in a list of the species 

 of "Isthmia". In the Fauna, 1887, he states that it is not 

 otherwise known to him. 



I. THE ATLANTIC ISLANDS (Madeira, Canaries, Cape Verdes). 



These species are toothless, like the continental cylindrica 

 group. The writer has seen T. linearis only. 



1. TRUNCATELLINA LINEARIS (Lowe). PI. 8, figs. 1, 2. 



Shell minutely, distinctly umbilicate, narrowly elongate- 

 cylindric or linear-oblong, very obtuse at both ends, the apex 

 as if decollate-truncate ; elegantly and beautifully closely 

 striate ; whorls 6-7 ; rather tumidly convex, 4 or 5 last equal ; 

 suture impressed. Aperture rather widely rotund-oval, a 

 little longer than wide, scarcely one- fourth the total length; 

 peristome rather simple, very narrowly reflected, the lip 

 slightly sinuate above (Lowe). 



Length 1.5 to 2, diam. % to % mm. ; aperture % to V 2 mm. 

 long; 6-7 whorls (Lowe). 



Length 1.4 to 1.5, diam. 0.83 mm.; 5y 2 whorls. 



Madeira : Pleistocene in the shell bed at Canical. 



Pupa linearis LOWE, Ann. Mag. N. H. (2), ix, April 1852, 

 p. 275; Proc. Zool. Soc. Lond., 1854, p. 207. -- WOLL ASTON, 

 Testacea Atlantica, 1878, p. 207. Pupa minutissima Hartm., 

 WATSON, Journ. de Conchyl., 1876, p. 223. 



Wollaston notes that "like most of the Pupae it has a 

 longer and a shorter state, some examples appearing to possess 

 a volution more than the others." Only this shorter phase is 

 before me (figs. 1, 2). Compared with T. cylindrica, the ribs 

 are more widely spaced, half to a fourth as wide as the in- 

 tervals. There is no trace of a crest behind the outer lip, 



