212 TORNATELLIDES OF HAWAIIAN ISLANDS. 



fu-sus is its nearest ally. It is, however, easily separated from 

 that species by its larger size, more numerous whorls and 

 stronger parietal lamella. 



17. T. KONAENSIS C. & P., n. sp. PI. 46, figs. 5, 6. 



Shell umbilicate, narrowly ovately turrited, corneous, nearly 

 smooth, slightly glossy, under a lens minutely striate with 

 lines of growth, and with a few distant slightly stronger striae 

 on the median whorls, thin, translucent. Spire subconic, apex 

 somewhat obtuse. Suture simple, well impressed. Whorls 

 6%, convex, the last rotund. Aperture narrowly oval, diag- 

 onal. Parietal lamella very minute, represented by a thin, 

 raised line. Columella narrowly triangular, inner margin 

 slightly arcuate. Peristome thin, erect, outer margin arcuate. 

 Umbilicus large, circular. Length 3.8, diam. 1.8, axis of apert. 

 1.6, urnb. 0.56 mm. 



Hawaii: Kona (Baldwin) ; Puna (Spalding) ; Olaa (Thaa- 

 num). Type 110. 36247 Bishop Museum, cotype no. 111725 P. 

 A. N. S. 



The original specimens of this species were received from 

 Mr. Baldwin under the name Tornatellina konaensis Ancey, 

 which has been retained, as Mr. Baldwin doubtless distributed 

 other specimens under the same name. No specimens of this 

 species are contained in the Ancey collection. Additional 

 examples referable to konaensis were later collected by Spald- 

 ing. 



Mr. Thaanuin found it in considerable quantity at Olaa. 

 One of these specimens, in basal view, is drawn in fig. 6. 



It differs from T. procerulus in the far wider umbilicus, the 

 more lateral, oval aperture, and in having the parietal lamella 

 reduced to a minute thread or even wholly lost in mature 

 shells. In the iieanic stage the lamella is distinct but very 

 low. The species is closely related to T. subangulatus, but it 

 is easily separated by its very low parietal lamella, form of 

 a.perture, etc. 



In an immature specimen with five whorls, from Puna, the 

 umbilicus is rather narrow and the columella slightly twisted. 

 The parietal lamella is oblique, 0.13 mm. in height. The 



