314 Synopsis of the Genus Achatinella. ' 



By the above it will be seen that Dr. Pfeiffer places^., duhia 

 Newc, and A. grisea ISTewc, as varieties of A. radiata Gould. 

 An examination of a large number of specimens of each species 

 confirms me in the opinion that they are quite distinct from 

 each other. The lineations characteristic of A. radiata Gould, 

 are wanting on A. dubia, which has a more highly polished sur- 

 face, covered with a pattern of fine undulations. A. radiata I 

 have never obtained heterostrophe. A. dubia is frequently, 

 and A. grisea always left-handed. 



Dr. Pfeiffer erroneously quotes for this last, " "Waianae, Oahu " 

 as the locality. It is confined to East Maui, so far as I can 

 ascertain. 



There are differences in the form of these species, when fully 

 matured, which are much more striking than in the ordinary 

 cabinet specimens. 



27. A. rubens Gould. Proc. Bost. Soc. 1845, p. 27. 



" " Reeve. Mon. fig. 42 b. 



" Mastersii Pfr. non Neioc. Mai. Blat. 1854, p. 129. 



Animal dark slate, as long as the shell, tentacles black, bot- 

 tom of foot and mantle brown. 



Sab. — West Mountains of Oahu. 



The animal is excessively timid, and lives burrowed under 

 leaves and other decaying vegetation. 



28. A. micleola Gould. Proc. Post. Soc. Jan. 1845, p. 28. 

 " brevis Pfr. Zool. Proc. Aug. 26, 1845. 



Hab. — Ivauai. 



Mr. Reeve figures for this shell (pi. 5, fig. 39) an immature 

 poor specimen of A. albolabris Newc, — an entirely different 

 species. 



