134 ACHATINELLA BYRONII. 



tuse summit, solid, glossy. Color variable, but typically green 

 and light greenish-yellow in oblique streaks on the last two 

 whorls, having a faint green peripheral band and a dark 

 chestnut band bordering the suture below ; next earlier whorl 

 yellow with a chestnut band, nearly three embryonic whorls 

 pinkish gray; aperture white, the lip bordered with dark 

 brown. Sculpture of faint spiral strias on the embryonic 

 whorls, later whorls irregularly wrinkled in the direction of 

 growth-lines, under the lens showing very faint traces of a 

 fine oblique malleation. Whorls 6%, somewhat convex, the 

 last often very obtusely angular at the periphery. Aperture 

 strongly oblique, the lip thickened within by a strong rib near 

 the margin. Columellar fold moderate, white or tinted. 



Length 20, diam. 11 mm. (typical size). 



Length 18, diam. 11 mm. 



Length 17, diam. 9% mm. 



Oahu: Kalaikoa, Ahonui (Gulick). 



Helix byronii WOOD, Supplement to the Index Testaceo- 

 logicus, or a Catalogue of Shells, British and Foreign, 1828, 

 p. 22, no. 30, pi. 7, f. 30. Acnatinella byronii Wood, NEW- 

 COMB, Ann. Lye. N. H. of N. Y., vi, p. 318. PFR., Monogr., 

 vi, 165. SYKES, Fauna Hawaiiensis, p. 306. Achatinella me- 

 Unostoma NEWCOMB, P. Z. S., 1853, p. 132, pi. 22, f. 7 (1854). 

 PFR., Monogr., iv, 521. Achatinella limb at a GULICK, Ann. 

 Lye., vi, 252, pi. 8, TOa, 705 (Feb., 1858). Helicteres byron- 

 ensis (Gray), BECK, Index Mjolluscorum, 1837, p. 51. 



A. byronii, in its southeastern forms, is closely related to 

 A. viridans and A. decipiens. All have more or less corru- 

 gated varieties, and others almost smooth. 



The type of A. ~byronii was denned only by a figure, but 

 this is of such excellence that no doubt of its identity can be 

 entertained. The shell was presumably brought to England 

 by Lord Byron, whose mission to Oahu in 1824 has been noted 

 in Vol. XXI, p. 157. All of his AcliatineUidcc were from near 

 the west end of the main range, Wahiawa to Kawailoa. The 

 present species does not occur in Kawailo'a district, but it is 

 to be found at Kalaikoa and Ahonui, places in Wahiawa dis- 

 trict, a few miles southward. I select Ahonui as the type 



