AMASTRA, OAHU. 211 



like the type, but uniform straw-yellow, entirely destitute of 

 brown bands ' ' ( Ancey ) . 



Waianae mountains (Baldwin and others). 



Mr. Ancey 's figure is copied in fig. 4. The tint is variable. 

 Figures 5, 6 represent brown or yellowish-brown shells. 

 Others, about half of the lot seen, are whitish with a very 

 faint greenish-yellow tint on the last whorl or two, the upper 

 part of the spire being brown-tinted, and the embryonic 

 whorls purplish-brown or dull blue (fig. 7). "Whether these 

 color- forms occur in one and the same colony we do not know ; 

 nor are we advised whether the banded frosti is found with 

 them or not. Their possibly racial status depends upon the 

 segregation or association of the forms. The surface in all is 

 glossy, and generally they retain traces of a thin brown or 

 blackish outer cuticle, of which fragments remain in spots on 

 a band below the suture, and sometimes scattered on the last 

 -whorl, more being retained in half-grown than in adult indi- 

 viduals. As a rule, the columellar lamella is rather small 

 and the face of the columella above it is smooth ; but in one 

 shell there is a second well-marked, more -oblique fold above 

 the normal one, such as occurs occasionally in A. turritella, 

 A. nigrolabris, and others of this group of species. The shape 

 is similarly variable in all the color forms, as shown in the 

 figuresi and measurements. Axis rimate. In a few shells of 

 typical coloring there is a weak carina on the last whorl. 



Length 15.5, diam. 7.2, aperture 6 mm. ; 7 whorls. 



Length 15, diam. 8, aperture 6.1 mm. ; 6i/> whorls. 



Length 17.2, diam. 7.5, aperture 6.1 mm. ; 7y 2 whorls. 



Length 16.5, diam. 8, aperture 6.3 mm. 



The above notes are from & series of 48 shells in coll. C. M. 

 Oooke, from back of Leilehua, Waianae range, 11 in coll. Bos- 

 ton Society N. II., and 3 in coll. A. N. S. P. 



45a. A. FROSTI Ancey. PI. 37, figs. 2, 3. 



"Shell minutely and very narrowly rimate, oonoid-turrited,. 

 glossy, impressed with minute, pliciform, more or less obsolete 

 growth-striae; straw-buff or yellowish-tawny, encircled with 

 many variously placed narrow, often confluent, bay, spiral 



