GLANDINA. 



GENERIC CHARACTER. 



Shell subturriculated, oblong-suboval, somewhat fragile, 

 terrestrial, simple ; front of the shell gradually attenu- 

 ated to the base of the columella ; aperture unarmed, ra- 

 ther narrow, nearly longitudinal ; labrum simple, a little 

 undulated ; columella incurved, truncated at base. 



OBSERVATIONS. 



Conchologists differ much in the arrangement of this 

 small group of shells. Chemnitz refers them to Bul- 

 la, and Buccinum : Gmelin and Dilhv3'n to Bulla, He- 

 lix and Yoluta, and the former has even placed one spe- 

 cies in Strombus ; Bruguiere to Bulinius ; Blainville and 

 Sowerby to Achatina ; and Ferussac to a subgenus of He- 

 lix. Montfort who, for the period in which he published, 

 formed genera with a profuse hand, was the first to sepa- 

 rate this group from all others. He distinguished it by 

 the name of Polyphemus, which we regret that we can- 

 not adopt, inasmuch as it w^as preoccupied by MuUer for 

 a genus of Crustaceous animals, and is still in use. It is to 

 Schumacher that we are indebted for the present generic 

 name, to which we are not aware of any objection. Witli 

 respect to the characters of the shell, there can be no doubt 

 that Glandina is very closely allied to Achatina, and not- 



PLATE XX. J 



