AMASTRA, OAHU. 181 



lower and broader than in reticulata, smooth. Aperture flesh- 

 colored within, with a white submarginal callus. Columellar 

 fold not so strong and horizontal as in reticulata. 



Length 17, diam. 9.7, aperture 9 mm.; 5% whorls (type, 

 fig. 5). 



Length 15.5, diam. 9, aperture 8.1 mm. ; 5% whorls. 



Length 15.9, diam. 10, aperture 9 mm. ; 5% whorls. 



Oahu: Waianae (Baldwin, Cooke). 



The summit is remarkably blunt in this form, and the out- 

 lines of the spire typically far more convex than in A. reticle 

 lata, yet there are some specimens intermediate in this fea- 

 ture. The axis is imperforate in all the adult shells seen. It 

 is an extremely variable form. Two "dead" shells in the 

 Boston Society collection from Waianae (out of no. 1759 

 Cooke coll.) showing extremes of contour in adult individuals, 

 measure : 



Length 18.7, diam. 10.1, aperture 9 mm. ; 6 whorls. 



Length 13, diam. 8.2, aperture 7 mm. ; 5% whorls. 



25c. A reticulata orientalis Hyatt & Pilsbry, n. subsp. PI. 

 29, figs. 8, 9, 10, 11. 



This includes the shells commonly referred to reticulata 

 which occur in the valleys of the eastern range. These differ 

 from true reticulata in being somewhat stouter and in having 

 blunter apices due to the more rapid widening of the shells. 

 Some shells, however, show- apices almost as sharp as in true 

 A. reticulata. Some have a uniform brown pattern, but most 

 of the shells 'are reticulated or flecked with interrupted light 

 bands as in reticulata, and are smooth in texture. There is 

 no correlation between the colors and the shapes of the shells. 

 The columellar fold is very strong and subhorizontal ; lip-rib 

 thick. Apical sculpture as in A. reticulata. 



Length 15, diam. 8.1 mm. ; whorls 5%. 



Length 13.5, diam. 9 mm. ; whorls 5%. 



Oahu, eastern range: Wahiawa (Gulick), types no. 92641 

 A. N. S. P.; Kahana (C. M. Cooke coll.). 



This may possibly be A. conspersa Pfr., but the figure of 

 that shows a more pointed apex. A. r. dispersa has not quite 



