86 Notes on Certain Terrestrial Mollushs. 



Dr. V. Rijgersma collected it several years since in the 

 Island of St. Martin, and very kindly supplied ine with 

 specimens. 



Helix ammonoceras, Pfeiffer. {Ammonoceras, Pfr.) 



I discovered this species in 1851, in New Grenada, and it 

 was described, from a specimen in the Cumingian Collec- 

 tion, by Pfeiffer in 1854 (Zool. Proc). 



During last year Governor Rawson sent to me, for deter- 

 mination, a single shell from the Island of Grenada, W. I., 

 which I found on comparison with a specimen of H. ammo- 

 noceras, preserved in the Robt. Swift Cabinet, to be identical 

 with it. 



Helix Hubbardi, A. D. Brown. (Strobila.) 



This was first found near Indianola, Calhoun Co., Texas, 

 by Mr. E. W. Hubbard, and described by Brown in the 

 Phila Proc. (Oct., 1861). It was subsequently discovered 

 at Bellevue, in the Parish of St. Andrew, Island of Jamaica, 

 and described (Jour, de Conch., Oct., 1871) by Mr. C. P. 

 Gloyne, as H. Vendryesiana. 



In November, 1872, Dr. W. Newcomb found a few speci- 

 mens on the trees in Bonaventure Cemetery, near Savannah, 

 Georgia, and kindly sent to me a couple. 



1 have no doubt as to the identity of the Texas, Jamaica 

 and Georgia shells. 



Gloyne mentions the parietal lamella only, but there are 

 others as described by Brown. The species is in fact allied 

 to H. labyrinthica, Say, and not to H. paludosa, to which 

 group it is referred by Gloyne. 



The distribution of H. Hubbardi is certainly curious, but 

 it may be observed that H. Strebeli, Pfr. , which is extremely 

 like, if not identical with, labyrinthica, belongs to the Mexi- 

 can fauna. 



