TORNATELLINA. 155 



is smaller than T. cylindrica, length 2.1, diam. 0.9 mm., with 

 5 whorls; aperture and columella shorter; whorls more con- 

 vex, with deeper suture. In the iieanic stage (fig. 3) the 

 parietal lamella flares outward in a strong lobe, and the colu- 

 mella is triplicate ; palatal rib denticulate. 



Molokai : Kilohana, near the Leper Settlement trail, on the 

 bark of a small dead tree (Pilsbry & Cooke). Types 108587 

 A. N. S. P., cotypes no. 33587 B. P. B. Mus. Also Puu Kole- 

 kole, on the flat east of the peak (P. & C.). 



16. T. POLYGNAMPTA P. & C., n. sp. PI. 41, figs. 1-5, 7, 8. 



The shell is imperforate, elongate, pale-brown, composed of 

 51/2 moderately convex whorls, the last not flattened ; lateral 

 outlines nearly straight. Aperture one-third the total length ; 

 columella twisted in a stronger spiral than T. peponum or T. 

 oblonga parietal lamella strongly flaring outward, high, with 

 uneven edge and fully a half- whorl long. Length 3.3, diam. 

 1.4, aperture 1.1 mm. 



Maui : Makawao and Kaupakalua (Baldwin). 



This species is easily distinguished from T. gracilis by its 

 thinner shell, the absence of a spiral depression on the last 

 whorl, its broader and larger aperture and by its diameter 

 being greater in proportion to its length. From T. peponum 

 it differs by the narrower contour, more strongly spiral colu- 

 mella and larger parietal lamella. In the iieanic stage it dif- 

 fers from both species. 



A young specimen (pi. 41, figs. 7, 8), at the ananeanic 

 stage, is 2.1 mm. in length and has slightly over 4 whorls. At 

 this stage the columella is triplicate. The columellar fold is 

 well developed, strongly twisted spirally. A very strong hori- 

 zontal lamella overrides it in the middle, and below this there 

 is a small nodule. The parietal lamella is very high, with 

 sinuous edge. There are two white ribs on the palatal wall, 

 one of them visible in the mouth. 



A later stage (metaneanic) is illustrated in figures 4, .">, 

 obliquely basal and front views. The shell is 3.0 mm. long. 

 The columella has lost its lower nodule. The high parietal 

 lamella is bent into one or two conspicuous lobes. The two 

 short palatal ribs are serrate. 



