192 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



places in the columns, an error which seems to have been corrected in 

 Chenu's original." 



One species and one variety are altogether omitted from Chenu's 

 list, and the thirty-two l)ivalves placed in a genus CocJdea by Martj^n, 

 in his Volume IV, are listed by Chenu as Card'non^ though the two 

 Cochlea of Volume 11 remain. The four shells listed by Martyn as 

 Musculi/x (i. e., JL>di()hi>t Lamarck) have the name 21ytllns in Chenu's 

 list. These facts point strongly toward a revision by Martyn himself 

 of the original engravings of the tables for Vohimes 111 and IV. 



The importance of Volumes III and IV is fortunately confined to the 

 specific nomenclature of the forms figured. Of these but a few are 

 American. One comes from Newfoundland, one from the Straits of 

 Magellan, and the rest of the American forms are from the West 

 Indies. Nearly all of them had been given specific names before Mar- 

 tyn's time, and there are no Pacific coast species among them. Only 

 Volumes 1 and II, or the first 80 plates (dating from 1784), are impor- 

 tant for any generic synon3'm3^ These are also the portions most 

 frequently quoted b}" Bruguiere, Gmelin, Lamarck, Deshayes, and 

 other contemporary or nearly contemporaneous authors. 



The present summary will enable those interested to form a correct 

 idea of the earliest issue of Volumes III and IV (178(1-87), not seen by 

 me wdien 1 prepared my former paper on Martyn and the Lniversal 

 Conchologist, and to positively confirm the priorit}" of Martyn's names 

 over those of Gmelin, Bruguiere, and Lamarck, as indicated b}^ that 

 publication. 



" Neritd liebrHa, Plate 109, second ligiire. 



