TORXATELL1DES OF HAWAIIAN ISLANDS. 227 



scarcely tumid, narrowly triangular, furnished with t\vu 

 minute scarcely oblique folds, the lower being weaker than 

 the upper. Peristome simple, erect, outer margin arcuate, 

 columellar margin nearly straight. Umbilicus nearly circular. 

 Length 4, diam. 1.8, axis of apert. 1.2, par. lam. 0.07, umb. 

 0.54 nun. 



Kauai: Kipu (Baldwin, Cooke), Nounou Mts. (C. S. Dole), 

 Hanakapiai (Deverill), Lihue, Hanakoa, Kalalau, Halemano, 

 Makaweli ( C ooke ) . 



Tornatellina macro m.phula var. producta ANC., Journ. <lc 

 Conchyl., li, 1903, p. 297. 



Ancey's material consisted of two specimens both of which 

 are much discolored. Product us differs from macromphala 

 by its much more slender spire, straighter outlines, number 

 of whorls, etc. Both species often occur together but in such 

 cases there are no intermediates. It is a rather common 

 species up to about 3,000 ft. elevation, and is usually found 

 on the dead leaves of Panda-mis, sometimes in very open coun- 

 try*. They also differ in the color of the animals. In ma- 

 cromphala the animal is very dark, while that of producta is 

 very light. 



An extremely narrow form has been found at Kipu. An 

 adult specimen with slightly more than 7 whorls measures: 

 length 3.2, diam. 1.3. This form seems at first sight to be more 

 closely related to T. perkinsi, but the more acute apex, color, 

 and wider umbilicus place it with productus. 



In an immature specimen of the typical form, with 5^2 

 whorls, the apical whorls are minutely spirally striate. The 

 last whorl is angulate at the periphery. The parietal lamella 

 is 0.12 mm. in height. The columella is furnished with two 

 slightly oblique folds, the upper 0.08, the lower 0.1 mm. in 

 height (fig. 10). 



34. T. MACROMPHALA (Ancey). PL 49, figs. 14, 15, 16. 



" Shell conic-turbinate, thin, corneous, slightly shining, 

 openly and deeply umbilicate, the umbilicus large for the 

 genus, circular; delicately marked with growth-lines. Spire 

 produced, of perfectly conic outlines, the apex minute. 



