LAURIA. 53 



mistake, remains uncertain. No subsequent collector has 

 found it there. 



A. cylindracea misella Paulucci does not appear to differ 

 materially from anconostoma. It was described thus: Differs 

 from the type [of cylindracea] by the smaller shell, very 

 fragile, without teeth or very minutely subdentate on the 

 parietal wall ; aperture narrower, rounded ; peristome less re- 

 flected, somewhat narrowed. Length 3, diam. 1.75 mm. Sar- 

 dinia : forests of Monte Cresia and Valle del Tacquisara, with 

 the typical form (Pauhicci). 



Lauria cylindracea dokrm (Pfr.). PI. 6, figs. 13, 14, 15. 



Shell rimate, ovate, glossy, pellucid, delicately striatulate, 

 brownish-corneous ; spire convex, obtuse ; 6 slightly convex 

 whorls, the last about two-fifths of the length, compressed at 

 base, slightly ascending in front; aperture oblique, sinuate- 

 oval, with a single compressed, lamelliform tooth on the pari- 

 etal wall at the insertion of the lip ; peristome angularly re- 

 flected, the right margin attenuate and sinuous above. Length 

 3 to 3%, diam. 1% to 2 mm., diam. apert. 1 mm. (Dohrn). 



The shell is very similar to the larger examples of ancono- 

 stoma. The lip is well reflected but narrow, brownish ; there 

 is no columellar lamella in the typical form from S. Antao 

 (but it is present in those of S. Nicolao, form perdubia) . The 

 base is perceptibly more rounded, less compressed than in 

 anconostoma. 



Length 3, diam. 1.8 mm., 5% whorls, topotype from Dohrn. 



Length 3.5, diam. 1.9 mm., barely 6 whorls. 



Cape Verde Islands: S. Antao, in the Ribeira de Joao 

 Affonso (Dohrn). S. Nicolao (Lowe). 



Pupa milleri Dohrn, Malak. Bl., xvi, 1869, p. 11. Not P. 

 milleri Pfr., 1867. — Pupa dohrni Pfr., Monographia, viii, 

 1877, p. 371. — Wollaston, Testae. Atlant., p. 513. Not Pupa 

 dhorni Desh., 1864. 



This form stands so close to anconostoma that its distinc- 

 tion may be superfluous, as Wollaston evidently thought. 



The S. Nicolao form, perdubia, Woll., pi. 6, figs. 14, 15, is a 

 little less conic, being wider in the spire, and showing a dis- 

 tinct if low columellar lamella. Length 3.3, diam. 1.7 mm., 



