ZOOTECUS. 109 



detects, p. 21, 1876) are larger, 13 x 4 mm., with. Sy 2 whorls 

 and a strong parietal callus, being similar to var. pullus. 



Some specimens from Senegambia before me are quite like 

 typical Z. insularis except in being in the average a little 

 more cylindrical, 10 x 3.8 mm., some of them with the spiral 

 grooves obsolete. 



Var.. subdiaphanus (King). PI. 26, fig. 33. Shell min- 

 utely perforate, conic at the summit, the last 3 or 4 

 whorls subcylindric, but slightly tapering, bluish-white un- 

 der a very thin yellow or brownish, cuticle. Sculpture of 

 fine, often nearly effaced striae, strongest below the suture, and 

 which in some specimens are interrupted by shallow spiral 

 grooves. Whorls l l / 2 to 8y 2 , slightly convex, the last a little 

 thickened behind the lip. Aperture small, widely ovate, the 

 peristome quite obtuse; columellar margin dilated and ex- 

 panded. Parietal callus usually rather thick. 

 Length 16.7, diani. above aperture 5.5 mm. 

 Length 12, diam. above aperture 4.2 mm. 

 Length 12, diam. above aperture 3.8 mm. 

 Length 9.8, diam. above aperture 3.4 mm. 

 Cape Verde Islands: Porto Praya (King, type loc.) ; S. 

 Nieolao, S. lago, Fogo and Brava under stones, especially in 

 barren places near the sea (Wollaston) ; S. Vicente, S. Antao, 

 Branco (Fischer). 



Pupa subdiapliana KING, Zoological Journal v, p. 340 (last 

 half of 1831). Bulimus subdiaplianus King, PFR., Symbols 

 ii, p. 122; Monogr. ii, 163; iii, 404; iv, 464; vi, 102; viii, 140; 

 Conchyl. Cab. p. 53, pi. 16, f. 7, 8. REEVE, Conch. Icon, v, 

 pi. 69, f. 493. MORELET, Journ. de Conch. 1873, p. 238.- 

 Buliminus s., DOHRN, Malak. Bl. 1869, p. 11. FISCHER, 

 Journ. de Conch. 1884, p. 380. Stenogyra siibdiapliana 

 WOLLASTON, Testacea Atlantica p. 511 (1878). Helix bam- 

 louclia Fer., RANG, Bull. univ. des Sci. i, 1827, p. 306 (no 

 description). Bulimus lambouclia WEBB et BERTH., Ann. 

 Sci. Nat. xxxviii, p. 325. Bulimus labouclia, POTIEZ et 

 MICHAUD, Catal. Moll. Galerie du Douai i, p. 134, pi. 14, f. 

 5, 6. (1838). 



The Cape Verde Island specimens are so similar to some 



