LEPTINAE1A. 289 



Achatina lamellata REEVE, Conch. Icon., v, pi. 18, f. 97 

 (according to Pfr.). Tornatellina blandiana PPB., Malak. 

 BL, xiv, 1867, p. 198; Monogr., vi, p. 262. Leptinaria &., 

 CROSSE, Journ. de Conch., 1890, p. 46. BLAND, Amer. Journ. 

 of Conch., iv, p. 185 (Port of Spain, chiefly among decayed, 

 wood, etc. ; also on the tops of trees in the forests, Gill) , 



The diagnosis given by Potiez and Michaud applies well to 

 the common Antillean form, except in dimensions ; but I think 

 the "15 mill." of the description is an error for 13 mill., 

 since shells of this length have the diameter assigned, 6 or 7 

 mm. The figures of P. and M. were drawn from a smaller 

 shell, 10 x 5 mm. The habitat was unknown to them. 



The sinning surface is very densely and finely arcuate- 

 striate. There are 5^ to 6 convex whorls. The outer lip is 

 arched forward, and usually has a white thickening within. 

 The columella is strongly twisted, the axis typically imper- 

 f orate. In the middle of the parietal wall a low lamella 

 stands, usually short, but sometimes so long that its inner 

 end cannot be seen in the mouth. This lamella seems to vary 

 widely, but is more frequently wanting or very small in adult 

 than in young individuals. I have seen specimens from all 

 the localities mentioned in the habitat paragraph above. 

 Some others are noted in the reference paragraph. 



The uterine young, taken from an opened shell, is globose, 

 with the columellar truncation and parietal lamella well de- 

 veloped, pi. 40, fig. 17. 



The original descriptions of synonyms follow. 



Tornatellina blandiana. "Shell covered subperf orate, 

 ovate-conic, rather solid, irregularly wrinkle-striate, little 

 shining, whitish waxy. Spire conic, the apex a little obtuse ; 

 suture deep, lightly margined. Whorls 6 to 6%, convex, the 

 last about three-sevenths the total length. Aperture slightly 

 oblique, sinuate-semioval, modified by a strong subhorizon- 

 tally entering lamella. Columella short, obliquely truncate; 

 peristome simple, the right margin unexpanded, arching for- 

 ward, columellar margin reflexed, appressed. Length 12.66, 

 diam. 6, aperture 6.3x3 mm. Trinidad (Pfr.). 



Leptinaria antillarum. Shell imperforate, oblong-conic, 



