30S Synopsis of the Genus Achatinella. 



Animal longer than the shell ; of a light gamboge yellow, 

 with slate colored tentacles and tentacular sheath, posteriorly 

 and superiorly slightly sprinkled with slate ; mantle of a bluish 

 yellow. 



Dr. Pfeiffer has placed perversa Swains., simulans Reeve, 

 vittata Reeve, and the variety of lugubris Chem. figured in 

 Reeve's Mon., as synonyms of this species. Without an 

 acquaintance with the animals or with their local distribution, 

 it is not surprising that he should thus group them together. 



In Mai. Blat., of June, 1854, Dr. Pfeiffer very properly res- 

 tores A. simulans to the rank of a species ; and we find it 

 necessary to extend the same courtesy to perversa and vittata. 



8. A. tristis Fer. Pro. No. 435. 



" fuliginosa Gould. Proc. Boston Soc. 1845, p. 28. 



9. A. lllguhris Chem. Chem. fig. 2059-GO. 

 " pica Swains. Zool. 111. pi. 99, fig 1. 



Monodonta seminigra Lam. Vol. VII., p. 37. 

 Bulimus seminiger MenJce. Syn. p. 2C. 



— A. luteola Fer. Hist. pi. 155, fig. 12. 



• I was not able to find this shell in any of the great European 

 collections. A diligent search in the Imperial Museum of the 

 Jardin des Plantes resulted in disappointment. 



The locality of Guam for this species, is evidently erroneous, 

 and grew out of a transfer of labels with the Partula gibba. 

 This latter species is very abundant at Guam, but not found 

 on the Sandwich Islands. There is a species undescribed, ap- 

 proaching this, now in the hands of Dr. Pfeiffer, but the 

 rounded whorls and transverse suture will not allow its arrange- 

 ment under this name. 



10. A. jmlcherrinia Swain. Zool. 111. pi. 123, fig. 2. 



" mahogani Gul. (var.) Ann. Lye. 1. c. p. 254, fig. 72. 

 " napus Pfr. Zool. Proc. 1855 (elongated variety). 



