144 TORNATELLINA. 



globose, imperforate, with a small lamella or denticle in the 

 middle of the columella fold (pi. 35, fig. 7). 



6. T. MCGREQORI P. & C., n. sp. PL 35, figs. 14, 15. 



Shell ovate, brown, very fragile, rather glossy, marked 

 with growth-wrinkles. Whorls convex. Columella slightly 

 sinuous, but very much less so than in T. baldwini ; in an ob- 

 lique view in the aperture it appears nearly straight. Pari- 

 etal lamella inconspicuous, very small and thread-like, far 

 more reduced than in T. baldwini. Length 2.8, diain. 1.65, 

 length of aperture 1.25 mm. 



Hawaii: Hilo, under guava leaves (E. C. McGregor, 1900; 

 H. W. Henshaw), types no. 85387 A. N. S. P. 



In large series of shells of all ages taken by Mr. McGregor 

 removed from one of the larger shells is figured (pi. 35, fig. 

 15). It has a rather strongly convex columellar fold, but no 

 lamella, superposed upon it, such as there is in T. b. subrugosa, 

 The columellar fold is much broader than that of embryos of 

 typical T. baldwini. 



In large series of shells of all ages taken by Mr. McGregor 

 and by Mr. H. W. Henshaw, none of the young have any trace 

 of the palatal fold found in T. baldwini. The whorls of T. 

 mcgregori are less convex and more closely coiled than those 

 of T. baklwini. 



1. T. PERPLEXA Garrett. PI. 34, figs. 12, 13. 



' ' Shell small, oblong-conic, imperforate, fragile, glossy, pel- 

 lucid, smooth, pale brownish-horn color; spire oblong-conic, 

 \\iili subplanulate outlines; apex obtusely rounded; suture 

 distinctly linear; whorls six, convex, moderately and regu- 

 larly increasing, the last convexly rounded not deflected in 

 front; aperture oblique, ovate-lunate, about one-third the 

 length of the shell ; peristome thin, straight, regularly curved ; 

 columella depressed, tortuous, bidentate, the basal tooth small, 

 the upper, which is submedial, is larger and prominent ; pari- 

 ct.d region with a large, prominent, curved lamina; palate 

 garnished with more or less numerous irregularly disposed 

 denticles. Length 2%, major diameter 1 mm" 



