AMASTRA, OAHU. 175 



somewhat spreading, columellar margin little dilated, adnate. 

 Length 15, diam. 8 mm." (Pfr.). 



Sandwich Is. (Frick, in Cuming coll.) ; Oahu (Hartman). 



Achatinella subrostrata PFB., P. Z. S., 1859, p. 31; Monogr., 

 vi, p. 181. L[abiella] subrostrata Pfr., HARTMAN, Proc. A. 

 X. S. Phila., 1888, p. 43. Amastra subrostrata Pfr., SYKES, 

 Fauna Hawaiiensis, p. 345. 



Pfeiffer remarks: "related to A. albolabris Newc." Hart- 

 man, who obtained specimens in London, states that it ' ' equals 

 albolabris Newc., and is an Amastra," though he gives it 

 place in his list as a separate species of Labiella. Mr. Sykes, 

 who has seen the type, writes: "It may possibly be an elon- 

 gate variety [of A. albolabris], but I doubt it." It has not 

 been figured. 



20. A. SERICEA (Pfeiffer). 



"Shell imperf orate, dextral, ovate-conic, solid, rather 

 rudely striate, minutely granulate-decussate by spiral striae, 

 silky, deep brown ; spire convexly conic, rather acute ; whorls 

 nearly 6, convex, paler at the suture, the last two-fifths the 

 total length, whitish around the columella, columella provided 

 with a short, compressed, oblique lamina. Aperture oblique, 

 elliptical; peristome simple, unexpanded, the right margin 

 nearly semicircular, joined in an angle with the calloused 

 columella. Length 17, diam. 9y 3 mm." (Pfr.). 



Sandwich Is. (Frick, in Cuming coll.). 



Achatinella sericea PFR., P. Z. S., 1859, p. 31; Mono- 

 graphia, vi, 179. Amastra sericea Pfr., PSE., P. Z. S., 1869, 

 p. 650. SYKES, Fauna Hawaiiensis, p. 343. 



This species seems to be known from Pfeiffer 's description 

 only, though Mr. Baldwin has recorded it with doubt from 

 AVaialua, Oahu. The rude striation, spiral striae and angular 

 junction of basal lip and columella indicate that the species 

 belongs to the group of A. transversalis, having perhaps some 

 resemblance to large, conic and dark forms of A. ret-iculata. 

 Compare also A. davisiana. The type seems to be lost, as 

 Mr. Sykes remarks that it is unknown to him. 



