COLUMELLA. 



247 



Length .075 inch ; breadth .055 inch [about 1.9 x 1.4 mm.] 

 (C. B. Ad.). 

 Jamaica (C. B. Adams). 



Pupa lata C. B. Adams, Contrib. to Conchology, No. 3, 1849, 

 p. 37. — ? Pfeiffer, Monographia, III, p. 530. 



4. Hawaiian species. 



12. Columella sharpi (Pils. & Cooke). PI. 30, fig. 6; text- 

 figs. 14, 15. 

 The shell is narrowly umbilicate, broadly ovate, the summit 

 obtusely conic ; thin ; chestnut brown, paler near the apex, 

 the surface somewhat shining and distinctly but not closely 

 striate. Whorls slightly over 5, quite convex, the suture 

 deeply impressed. The aperture is strongly oblique, rounded 

 lunate. Peristome thin and simple, the basal and outer mar- 

 gins well arched ; columella vertical with broadly dilated edge. 



Figs. 14, 15. C. sharpi. 



Fig. 16. C. alexanderi. 



The insertions of the lips are remote. The umbilicus is cir- 

 cular and deep. Length 1.8, diam. 1.36 mm. 



Hawaii : Crest of the Kilauea crater, about a half mile south 

 of the hotel. Types No. 91699, A. N. S. Phila., collected by 

 Dr. Benjamin Sharp ; cotype in the Bernice Pauahi Bishop 

 Museum, Honolulu. Also taken by Cooke and Pilsbry along 

 the road to Kilauea iki, about % mile from the Crater House. 



Sphyradium sharpi Pilsbry and Cooke, Proc. A. N. S. 

 Phila., July 23, 1906, p. 215, text-figs. 1, 2. 



This species is closely related to the following two, from 

 which it differs in being somewhat larger, broader, but with 



