370 Land 8hells from Porto Rico. 



Description of Two Species of Land Shells from 

 Porto Rico, W. I. 



BY PROFESSOK EDWARD V. MARTENS. 

 [Communicated by Thomas Bland.] 



Read May 21st, 1883. 



Note by Thos. Bland. 



Ill 1882 I forwarded to Prof. v. Martens several shells re- 

 ceived long since from my late friend, Mr. Eobert Swift, col- 

 lected, I believe, in Porto Eico, and wliicli I was unable 

 satisfactorily to determine. 



I had submitted the shells to Mr. G. W. Tryon, Jr., asking 

 him to compare them with specimens in the Swift Collection, 

 the property of the Academy of Natural Sciences, Philadelphia. 

 Mr. Tryon found no similar forms in the Academy collections, 

 but pointed out the alliance of one of the species with Ghondro- 

 poma Toi'tolense, Pfr., especially with specimens so labelled, 

 from the island of Ancgada: — of this I informed Prof. v. Mar- 

 tens, when presenting the shells to the Berlin Zoological Mu- 

 seum. 



In my correspondence with Prof. v. Martens, I mentioned 

 that I was preparing notes on the Geographical Distribution of 

 the Land Shells of the West Indies, with complete lists of the 

 species of each island. He was kind enough to forward to me 

 the descriptions subjoined, for insertion in my proposed paper. 



The completion of that paper has, from various causes, been 

 delayed ; but I deem it desirable that the publication of the 

 contribution of Prof. v. Martens should be no longer postponed. 



