ACHATINELLA C^ESIA. 267 



other fragile snails as well as Amastra and various ground 

 shells. They must have lived where they are now found, their 

 preservation being due to the calcareous sand which drifted 

 over the forest-bed. Probably Achatinella has nowhere else 

 been found so near the sea the shore being only a few rods 

 away, and the difference of level not over 10 or 12 feet. It is 

 quite likely however that there has been some subsidence of 

 the island since the forests extended so far down. 



Kahana. A. ccesia cervina Gulick, of which the type is 

 figured, pi. 43, fig. 12, is a weakly characterized race of c&sia, 

 of which very few specimens were found. It is a thin shell 

 very similar to concidens, and with much the appearance of 

 A. buddii, as Sykes and others have noticed. It is cinnamon 

 colored with softly blending darker streaks and many fine 

 russet lines, which become distinct only on the last half of the 

 last whorl. The suture is narrowly bordered with white, and 

 the embryonic whorls are cinnamon-buff fading to whitish at 

 the apex. A small cream-white area surrounds the columella. 

 The lip is thin, not beveled or thickened within, and like the 

 whole interior is pale pinkish buff, nearly white. Columellar 

 fold central, thin but rather prominent. There is a very short 

 and narrow perforation. Length 19.4, diam. 11, aperture 9.6 

 mm.; whorls about 6. The smoother surface and central 

 columellar fold differentiate this from A. c. littoralis ; the shell 

 is thinner and more capacious than scitula or cognata. 



Hakipuu. Mr. Gulick described A. cognata and A. scitula 

 from this valley. In my opinion the two belong to one race, 

 which would stand as A. ccesia cognata. The type-specimen 

 of cognata, pi. 44, fig. 8 (no. 60 of the Gulick type collection, 

 Boston Society), is a shell closely resembling A. dimorpha. 

 It is moderately solid, very smooth and glossy. The last whorl 

 has pale salmon colored streaks shading into the whitish 

 ground, but on the back of the last whorl the streaks give 

 way to a general sea-shell pink color (cf. Ridgway, Color 

 Standards, pi. xiv). The tint is paler towards the suture of 

 the last whorl, and the two whorls preceding are almost white. 

 The embryonic whorls are light buff with a white sutural line, 

 but on subsequent whorls there is a narrow chestnut sutural 



