4 LEPTACHATINA. 



The axis varies from "subrhnate" to distinctly perforate. 

 The face of the columella is thickened, and the parietal callus 

 is rather strong. The coluinellar lamella recedes, and is 

 scarcely or not visible in a direct face view, but the shell need 

 be turned very little to show it like Vol. XXI, pi. 3, fig. 61. 

 That shell measures, length 8.1, diani. 3.8 mm. (No. 57822 

 A. N. S.) 



Diamond Head, in the cutting of the ocean road and above 

 it ; around the tunnel on the N. W. side ; floor of the crater, 

 and in the breccia along the ascent to the lookout (Cooke, 

 Bryan and Pilsbry). L. oryza is common everywhere in the 

 Diamond Head deposits, but the most perfect come from the 

 inside of the crater around the "lake" (pi. 10, figs. 7, 8). 

 The parietal callus and columellar margin are especially 

 thick ; the striation is faint or nearly effaced except close to 

 the suture; and the umbilical crevice is very small or even 

 closed. Sometimes the columellar lamella emerges ; sometimes 

 it is not visible in a front view. The size varies from length 

 10, diani. 4.1 mm., to length 9, diam. 4 mm. It occurs also in 

 the bench of consolidated calcareous sand which extends 

 eastward of Diamond Head. 



Punchbowl, about 300 ft. above the summit, and about two 

 feet below the surface, specimens were taken by Prof. 

 Wm. Alanson Bryan. 



The Kailua specimens occurred in a raised bench of cal- 

 careus sand-rock about ^ mile from the north shore (Pils- 

 bry). See pi. 10, fig. 9. They have the columellar lamella 

 more prominent in front view, and the size averages smaller, 

 than in shells from Diamond Head, length very little more 

 or less than 8 mm. At Laie the shells are from a dune deposit 

 utilized as a sand pit by the railroad. It is west of the 

 stream, between the road and the sea. The shells vary in 

 prominence of the columellar lamella, and are sometimes 

 imperforate. Length 6.3 to 8 mm., but there are very few 

 of the larger shells, 7x3 mm. is a common size. 



At the deposit iy 2 miles east of Kahuku (pi. 10, figs. 3, 4, 

 Cooke & Pilsbry) the shells are a little more strongly striate 

 than those from eastward, and 8 mm. long. In another place 



