Synopsis of the Genus Achatinella. 313 



Animal light grey ; tentacles and tentacular sheath dark 

 slate ; mantle thick, yellowish brown ; tentacles strongly club- 

 bed, short, and robust, when extended, longer than the shell. 



Dr. Pfeiffer places my rutila, subvirens, and decipiens, as 

 varieties of this species. The two former are nearly allied to 

 viridans, but the latter is so widely separated as to have fur- 

 nished four or more species from its varieties, subsequently to 

 my descriptions. This would indicate that the views of their 

 authors are in conflict with this eminent naturalist. 



24. A. miistelilia Mig-lielS. Proc. Boat. Soc. 1845, p. 21. 



" lorata var. /3. Pfr. Mon. II. p. 236. 



Animal of a grass green, through different shades more or 

 less intense ; tentacles light slate. 



A very curious variety of this shell is met with, in form re- 

 sembling A. decora. It is polished, of a roseate, ashy hue above, 

 and the inferior half of the last whorl deep brown or black. 

 The animal is, however, identical with A. mustelina, and it is 

 met with in the mountains of Waianae, on the island of Oahu, 

 the central region for mustelina. 



25. A. Cingllla Migiiels. Proc. Bost. Soc. 1845. 



It is possible that this name should covert, mtrea Newc, 

 but the shell in the Mus. Cuming is quite a different species 

 from vitrea, and for the present I prefer to hold the latter as a 

 distinct species. 



26. A. radiata Gould. Proc. Bost. Soc. Jan. 1845, p. 27. 



" dubia Pfr. non Neioc. Mai. Blat. 1854, p. 116. 



" grisea Pfr.non Newc. " " " " 117. 



Partida radiata Pfr. Mon. III. p. 454. 

 Bidimus Gouldi Pfr. Mon. II. p. 74. 

 Partula densilineata Reeve. Mon. pi. 2, fig. 9. 



