AURICULELLA, HAWAII. Ill 



Species of Hawaii. 



29. A. WESTERLUNDIANA Ancey. PL 19, figs. 9, 10, 11. 



"Shell sinistral, perforate, grayish corneous, fragile, pel- 

 lucid, ovately conic, glossy, under a lens very finely striate 

 with lines of growth. Spire conic, apex strongly obtuse. 

 Whorls 6, regularly increasing, convex, separated by an im- 

 pressed suture ; the last whorl tumidly rotund, not ascend- 

 ing. Aperture externally and at the base convexly rotund, 

 slightly oblique, emarginate; parietal wall of the aperture 

 furnished with a spirally compressed, elongate and thin la- 

 mella; columella edentulous, viewed obliquely it is scarcely 

 twisted-plicate within. Lip thin, simple, lightly and shortly 

 spreading and expanded, reflexed at the columella, covering 

 the dilating perforation ; the margins are not united by a cal- 

 lus. Length 6.5, diam. 3.5, length of aperture 2.6 mm." 

 (Ancey). 



Hawaii: Kona (Baldwin, Perkins, Thwing) ; Olaa (Perkins, 

 Thaanum) ; Waimea (Lyons) ; Hilo (Thaanum) ; Glenwood 

 (Thaanurn, Cooke & Pilsbry). 



Auriculella westerlundiana ANCEY, Bull. Soc. Malac. 

 France, vi, 1889, p. 218; op. cit., vii, 1890, p. 721. SYKES, 

 Proc. Malac. Soc. London, iii, p. 275, pi. 13, fig. 21; Fauna 

 Hawaiiensis, ii, Moll., p. 379. 



M. Ancey in a note (Bull. Soc. Malac. France, vii, 1890, p. 

 721) mentions three color varieties of this species: corneous 

 with a broad brown band; unicolorous, pale yellow; subcor- 

 neous, pellucid ; chestnut without bands. 



This species is very distinct. Some of the thinner varieties 

 of A. uniplicata somewhat resemble it, but the thickened lip, 

 more solid shell, and less rotund aperture of the former easily 

 distinguish the two species. It has some resemblance to A. 

 perpusilla of Oahu, but a comparison of the diagnoses will 

 easily separate the two. A. westerlundiana is consistently sin- 

 istral. 



