22 AM ASTRA. 



A. ANTIQUA KAWAIHAPAIENSIS P. & C., H. Subsp. PI. 2, fig. 13. 



Differs from A. antiqua Bald. (Vol. XXI, p. 160), by hav- 

 ing the spire straightly conic, not contracted near the sum- 

 mit; last whorl somewhat swollen above the periphery, while 

 antiqua is evenly convex; sculpture much less coarse. It 

 is found in the soil of a plowed field between the bluff and 

 the railroad, and though fossil, shows some color. The 

 embryonic whorls are neutral red, gradually fading down- 

 wards, the last two whorls gray- white. The surface is weakly 

 and very sparsely plicate, and irregularly indented. Aper- 

 ture small, contracted, subangular at base of the columella. 

 Peristome acute, strengthened with a rather strong orange- 

 cinnamon callus which is somewhat further from the edge 

 than usual. Columellar lamella rather small. Umbilicus 

 about as in A. antiqua or slightly more compressed. Length 

 17, diam. 10.5, aperture 8.3 mm.; 6 whorls. 



Oahu: Kawaihapai, at the western end of the Waianse 

 Mountains, in soil of a field, perhaps 20-30 ft. above sea level, 

 Pilsbry and Cooke, 1913. 



A. UMBILICATA (Pfr.). PL 2, figs, 5 to 8. 



Vol. XXI, p. 251. This species was sent to Pfeiffer by 

 Frick. In the absence of Oahuan specimens, I formerly fol- 

 lowed Newcomb's identification of Molokaian specimens as 

 A. umbilicata, and doubted its occurrence on Oahu. Speci- 

 mens agreeing fully with Pfeiffer's description and with 

 Newcomb's Molokai examples are now before us from the 

 following places in Oahu : 



iy 2 miles east of Kahuku; Laie, west of the stream, between 

 the road and the sea (Cooke and Pilsbry) ; Kaelepulu, Kailua, 

 in debris of a rocky bluff 6 to 10 ft. high, about 14 mile from 

 the sea (Pilsbry). All of these specimens are from Pleis- 

 tocene deposits not far above sea-level. 



"We know from the shells he got that Frick collected a good 

 deal on the koolau side of the Main Eange, and he certainly 

 must many a time have passed the Laie and Kahuku deposits 

 within a few feet, on the shore road. "We do not doubt, 

 therefore, that the type of A. umbilicata came from Oahu, 



