Descriptions of new species and varieties of Shells, which 

 inhabit Jamaica. By C. B. Adams, Professor of Zoology, 

 &c., in Amherst College. Read before the New-York Ly- 

 ceum of Natural History, Oct. 21st, 1850. 



The following descriptions are in continuation of the Con- 

 tributions TO CoNCHOLOGY, which wcrc published by the writer 

 in seven numbers, from Sept. 1849 to April 1850. They com- 

 prise the more important of the undescribed types of the land 

 and fresh water shells of Jamaica, which are accumulating 

 for a proposed monograph of the land and fresh water shells 

 of that island, and such of the marine species as are believed 

 to be undescribed. 



I take this opportunity to explain that three species of the 

 land shells of Jamaica had received the names of persons, both 

 in the original manuscript descriptions, and in labels with 

 which specimens were distributed. But at the request of the 

 late lamented Dr. Binney, whose name had been used, and 

 who deemed it inexpedient to name species in this manner, 

 other names for these species were substituted, as the article 

 went to press. Unfortunately the first names, taken from the 

 labels, were published by Dr. Pfeiffer. These are now sup- 

 posed by some writers to have priority ; but by attention to 

 the dates, it will be perceived, that the names published in 

 the Proc. Bost. Soc. Jan. 1845, have priority. They were in 

 fact published before the shells could have been received in 

 Europe. I can only regret having thus inadvertently caused 

 the existence of synonymes. The following are the species : 



Cyclostoma pulchrius Ad. ; Syn. C. Binneyanum Pfr. 



Cylindrella nobilior (Pupa) Ad. ; Syn. C. Binneyana Pfr. 



Helix arboreoides Ad. ; Syn. H. Haldemaniana Pfr. 



In the same article, Achatina Griffithii was erroneously 



