156 TORNATELLINA. 



At a slightly later stage (paraneanic) the upper columellar 

 fold becomes less prominent and the parietal lamella loses the 

 lobes (fig. 3). 



Finally, at the adult or ephebic stage (pi. 1, figs. 1, 2), the 

 median columellar lamella and the palatal ribs disappear en- 

 tirely. 



T. p. kamaloensis P. & C. PI. 40, figs. 4, 5. 



The shell is imperforate, very slender, narrower than T. 

 polygnampta, cinnamon; having irregular growth- wrinkles 

 outlines of the spire nearly straight. Base less convex than in 

 T. polygnampta. Whorls 5^, not very convex. Aperture 

 obstructed by a very large, subhorizontal parietal lamella, 

 fully a half-whorl long. Columella more strongly sigmoid 

 than in polygnmnpta. Length 2.9, diam. 1.2 mm. ; length of 

 aperture 1.1 mm. The neanic stage (fig. 5) has the parietal 

 lamella more strongly sinuated than T. polygnampta from 

 Maui. 



Molokai : Western ravines of Kamalo near the old irriga- 

 tion ditch (Cooke & Pilsbry). 



17. T. PEPONUM (Gould). PL 35, figs. 1, 2, 5, 6; pi. 42, figs. 

 4, 5, 6. 



The shell is slender, turrite, amber-colored, the surface is 

 smooth, scarcely marked with growth -striae. Outlines of the 

 spire are straight, the summit obtuse. Whorls 5y 2 , all convex, 

 separated by a well-impressed suture, which has a very nar- 

 row transparent margin below. The aperture is somewhat 

 oblique, ovate. Columella vertical, only slightly sinuous, the 

 concavity of its lower part being occupied by a callus. The 

 parietal lamella is fully a half-w r horl long, and well devel- 

 oped. Length 3.4, diam. 1.4, length of aperture 1.1 mm. 



Hawaiian Islands: "either at Hilo [Hawaii] or on Oahu, 

 abundant on pumpkin vines" (U. S. Expl. Exped.). Hawaii: 

 Olaa, Okala and Kohala (Thaanum). Type no. 5506 U. S. 

 Nat. Mus. 



Pupa pcponum OLD., Proc. Bost, Soc. N. H., ii, March, 

 1847, p. 197; Expedition Shells, p. 34; U. S. Expl. Exped., 

 Mollusca and Shells, p. 93, pi. 7, figs. 104, 104d Tornatrttina 



