ELASMIAS. 117 



and the inner margin of the columellar plate is more dis- 

 tinctly biplicate. 



The interior of a Popouwela (Oahu) specimen is drawn in 

 pi. 28, fig. 6. The largest seen from this locality is 3.2 mm., 

 long. 



There is a decidedly paler form, which may be called E. /. 

 obtusum (pi. 28, fig. 5), with less swollen whorls and more- 

 obtuse summit on the western ridge of Popouwela, where it 

 occurs with the dark typical form. The figured specimen 

 measures, length 2.7, diam. 1.8 mm. 



2. E. LUAKAHAENSE n. sp. PI. 29, figs. 7, 8, 9, 10, 



Shell globosely-ovate, light corneous, thin, semi-transparent, 

 somewhat shining, nearly smooth, under a lens minutely 

 marked with growth-striae. Spire convex in outlines, summit 

 obtuse. Suture simple, well impressed. Whorls almost 4, 

 convex, increasing rather rapidly ; the last broadly ovate, 

 with a convex base. Aperture large, irregularly ovate, ob- 

 lique. Parietal lamella strong, flaring outwards, thin, arcuate 

 in section. Columella vertical, slightly twisted. Columellar 

 plate large, broad, irregularly triangular, concave below, with 

 its inner margin sinuous, slightly twisted, thickened the 

 thickening extending as a ridge just above the concave base 

 of the plate, and reaching nearly to the outer margin of the 

 columella. Outer lip thin, convex. Length 2.5, diam. 1.6, 

 length of aperture 1.4 mm. 



Kauai: Halemauu, Wailua (Cooke). Oahu: Nuuanu, Lua- 

 kaha (type loc.) ; Manoa, Punaluu, and Kaliuwaa (Cooke) ; 

 Waialua (Lyman). Type no. 14145, B. P. Bishop Museum. 



Tornatellina aperta ANCEY, Journ. de Conchyl., li, 1903, p. 

 295, not of Pease. 



Ancey's specimens are in the collection of the Bishop Mu- 

 seum, no. 18467. 



E. luakahaense is a much smaller species than E. apcrtum, 

 and in adult specimens there are two less whorls. The shell 

 is more fragile and lighter colored and the parietal lamella 

 and columellar plate are much more strongly developed in 

 proportion to the size of the aperture than in Pease's species. 



