SIMPULOPSIS. 215 



HIDALGO, Viaje al Pacifico, p. 5. Succinea membranacea MICH., 

 teste Villa, Dispositio Syst., p. 9 Not S. sulculosa H. & A. ADAMS, 

 Gen. Rec. Moll., pi. 73, f. 1. 



This rather small species of southern Brazil is easily recognized 

 by the coarse and irregular shallow sulcation and the prominent and 

 conic spire. Well-preserved shells show many dull bands on a bril- 

 liant ground, scarcely visible without a lens, and varying in degree 

 of development in different specimens. In the collections I have 

 seen, the name sulculosa seems to have been often applied to other 

 species. 



Dr. Hidalgo reports specimens with 4^ whorls, measuring, alt. 15, 

 diam. 13 mm., from Botafogo, near Rio Janeiro. 



S. BRASILIENSIS (Moricand). PL 64, figs. 84, 85. 



Shell semi-oval, ventricose, very thin, pale greenish-yellow, sub- 

 transparent. Surface glossy, regularly and deeply corrugated, the 

 folds rather close and nearly regular, smooth or nearly so ; no spiral 

 sculpture. Spire very short and low. Whorls 3^, the earlier 1^ or 

 2 smooth, the last whorl very large and globose. Aperture quite 

 oblique, large, rounded-ovate ; peristome thin and sharp, the outer 

 lip inserted above the periphery of the penult, whorl ; columella thin, 

 somewhat concave, meeting the basal lip in a salient angle, in the 

 middle of the apparently columellar margin. 



Alt. 12, diam. 13, longest axis of aperture 12.3, width 9 mill. 



Alt. 11.5, diam. 12, longest axis of aperture 12, width 8 mill. 



Alt. 12.5, diam. 15, longest axis of aperture 13.5, width 10 mill. 

 S. Gonzahes, Brazil, in humid forest (Blanchet). 



Helix (Cochlohydra) brasiliensis Sowerby, MORICAND, Mem. Soc. 

 Phys. et Hist. Nat. Geneve, vii, 1835-6, p. 416 (no sufficient de- 

 scription); Mern., etc., xi, p. 148, 149, 160, pi. 5, f. 5 (as Succinea 

 brasiliensis), 1845-6. Vitrina brasiliensis Mor., PFR., Symbols?, ii, 

 p. 62 (1842), no description Vitrina obtusa Sow., PFR., Monogr., 

 ii, p. 511 (1848). Simpulopsis obtusa PFR., Monogr., iii. p. 7; 

 Conchyl. Cab., p. 29, pi. 3, f. 1, 2. 



Distinguished chiefly by its extremely short, low spire and high 

 insertion of the outer lip. The angulated columellar margin, caused 

 by the meeting of the arc of the basal margin with that of the colu- 

 mella, is not constant, the angle being often obsolete. 



This species has been called obtusa Sow. by Pfeiffer, but I find it 



