LEPTACHATINA, GROUP O. 69 



Hawaii: Mauna Loa at 4000 feet (Perkins), Hamakua 

 subfossil (Ancey), Kona (Baldwin). 



Leptachatina imitatrix SYKES, Fauna Hawaiiensis, ii, 1900, 

 p. 364, pi. xi, fig. 9. ANCEY, Journ. Malac. xi, p. 69. 



"Only a single specimen. It recalls L. exilis of Gulick, but 

 is more conic, i. e. the upper whorls are narrower in propor- 

 tion and it is of a light straw yellow. The columellar plait 

 is deeply-seated and inconspicuous." (Sykes.) The original 

 figure is copied. 



Unfortunately the type and only specimen is probably lost. 

 I follow M. Ancey in referring the fossil material to this 

 species. It agrees fairly well with the description, though 

 many of the specimens with over 6 whorls measure only 6.2 

 mm. In Mr. Baldwin's collection is a shell which I have re- 

 ferred to this species. This shell is broader in proportion to 

 its length, being nearly 3 mm. in diameter; in its other char- 

 acters it agrees closely with Mr. Sykes' description. 



0. Group of L. striatula. 

 91. L. ATTENUATA n. sp. PI. 7, figs. 45, 46. 



The shell is perforate, elongate, attenuate, brownish corn- 

 eous, rather thin, sub diaphanous, glossy, rather closely costu- 

 late (except on the embryonic whorls) there being 4-6 costas to 

 a millimeter. Spire attenuate, apex subobtuse. Suture 

 finely margined, lightly impressed, slightly crenulate. Whorls 

 8, very slightly convex, the penultimate slightly more tumid 

 than the rest, the last elongate, somewhat attenuate at the 

 base, slightly ascending near the lip. Aperture subovate, 

 slightly diagonal and very slightly oblique. Columella nearly 

 straight, with a thick, acute callus along its face; columellar 

 fold oblique, strong. Outer lip regularly arcuate, distinctly 

 thickened within ; columellar margin adnate for nearly % its 

 length, almost covering the perforation. Umbilicus minute, 

 with angular margin. Length 13.5, diam. 5.2, length of 

 aperture 5.0 mm. 



Kauai: Haleieie, Makaweli, Waiakoali, Ekaula (Cooke) ; 

 Hanalei (Lyman, Cooke). 



This species has been referred to L. acuminata Gld., and 



