AMASTRA, OAHU. 173 



Oahu: Summit of Lanihuli, at 2700 ft (Spalding). Type 

 no. 16633, Bishop Museum. 



Amastra irwiniana COOKE, Occas. Papers B. P. Bishop Mus., 

 iii, p. 17 [213], f. 3 (July 24, 1908). 



"This species is undoubtedly related to A. breviata Bald- 

 win. It is, however, smaller, with a more acute and slightly 

 concave spire, and the arrangement of its color is different. 



"A second specimen has the following measurements: 

 length 10.8, diam. 6.9 mm." (Cooke). 



Alt. Lanihuli stands between the heads of Nuuanu and 

 Kalihi valleys, at the head of Kapalama. The locality is 

 therefore within the area recorded for A. breviata. The em- 

 bryonic whorls are much more sharply striate than in A. bre- 

 viata, more resembling fresh specimens of A. cornea, which 

 also agrees in the shape of the spire. A. irwiniana, here fig- 

 ured from the type specimen, seems rather isolated in its 

 group. Dedicated to Mr. Irwin Spalding. 



18. A. ALBOLABEIS (Newcomb). PL 30, figs. 21, 22, 23. 



' ' Shell conically ovate ; apex acute ; whorls 6, rounded, not 

 margined ; aperture ovate ; columella short, plicately toothed ; 

 lip semilunar, thickened and white ; color dark umber with a 

 yellow sutural line; within bluish white. Length fourteen- 

 twentieths, diam 6^-twentieths of an inch" (Newc.). 



Oahu: W-aianae (Newcomb); Lihue (Gulick); Kalihi and 

 Kapalama (Baldwin) ; Nuuanu (C. M. Cooke). Co-types in 

 coll. Newcomb and British Museum. 



Achatinella albo-labris NEWC., P. Z. S., 1853, p. 149, pi. 24, 

 f. 56. A. albolabris Newc., PFB., Monogr., iv, 556. BALD- 

 WIN, Catalogue, p. 8. Achatinella nucleola Gld., REEVE, 

 Conch. Icon., v, pi. 5, f. 39 (1850), not of Gould, 



This species certainly inhabits both of the Oahuan ranges. 

 It was first taken in the Waianae range, but it has also been 

 taken in some numbers in the eastern range, in the adjacent 

 valleys Kalihi, Kapalama and Nuuanu. Numerous specimens 

 from Newcomb, Gulick and Cooke are before us. 



The shell is solid, nearly or quite imperforate, covered with 

 a thin, glossy, yellow cuticle, the calcareous layer below it 



