CAREUA. HI 



Length 44.5, diam. 15 mm. ; whorls 



Length 46.5, diam. 13.5 mm. ; whorls 9. 



Length 43, diam. 14 mm. ; whorls Sy 2 . 



Length 36, diam. 13.5 mm. ; whorls 7%. 



This species is slightly more advanced in evolution than 

 C. cumingiana, shown by the frequent loss or weakness of the 

 keel on the last whorl, a feature of senility. 



Borcherding's C. cumingiana var. kobelti was based upon 

 specimens resembling my figs. 1 and 2, and probably from 

 the same locality. The form he figures as typical dolei wants 

 the spiral angles described by Ancey. If the specimen is 

 dolei, it is very far from typical. 



8. C. RIGIDA Hyatt, n. sp. PI. 21, figs. 8, 13. 



The shell is slender, turrited, the last 5 whorls increasing 

 slowly, those earlier much more rapidly; red-brown, with a 

 narrow whitish band below the suture on the last 5 whorls, 

 its lower edge not sharply defined ; the upper whorls and the 

 base somewhat darker than the intermediate whorls. Whorls 

 8%, the upper ones but slightly convex, the last five moder- 

 ately convex, chiefly just above the middle of each, where 

 there is a group of about 3 weak spiral striae on the last 

 3y 2 whorls. The last whorl is convex close below the suture, 

 distinctly flattened peripherally, angular at the base, slightly 

 concave below the angle. Aperture small. Columella with 

 the twist not very prominent. Length 46.8, diam. 14 mm., 

 length of aperture 13 mm. 



Kauai. 



This species is related to C. cochlea and C. dolei, and may 

 turn out to be a form of the latter. The strong basal angle, 

 the spiral striae of the upper surface, and the much lengthened 

 spire of many whorls are its chief characters. Description 

 and figures from specimen in coll. Dr. C. Montague Cooke, 

 labeled by Hyatt, whose account follows. 



This species is similar to Carelm cumingiana, but the white 

 band is much narrower, being often a mere trace, and the 

 shoulder less prominent. , The apertures are however very 

 much alike, owing to the rate of growth, the flatness of the 



