545 



SHELLS. 



Description of the Cirrhipeda^ Conchifera, and Mollusca, 

 in a Collection formed by the Officers of H.M.S. Adventure 

 and Beagle^ employed between the years 1826 and 1830 in 

 surveying the Southern Coasts of South America, including the 

 Strait of Magalhaens and the coast of Tierra del Fuego. By 

 Captain Phillip P.King, R.N., F.R.S., &c., assisted by W. J. 

 Broderip, Esq., F.R.S., &c. (From the Zoological Journal.) 



The testacea, of which the following paper is a descriptive list, 

 were principally collected upon the coast of South America ; and, 

 upon my arrival in England, were submitted to the examination 

 of Mr. George Sowerby ; who very obligingly selected the unde- 

 scribed species from the collection which had been formed under 

 my superintendence by the Officers of H.M.S. Adventure and 

 Beagle, employed under my command in surveying the southern 

 coast of South America. 



To these gentlemen I am greatly indebted for the unwearied 

 assiduity which they at all times displayed, and for the extent 

 of the collection in this, as well as in other departments of Natural 

 History. 



In the description of the species I have had the benefit of the 

 advice and assistance of my friend Mr. Broderip ; and to his 

 knowledge of the subject, and the attention which he has devoted 

 to my collection, I owe in a great measure the paper which I have 

 now the satisfaction of presenting to the public through the 

 medium of the Zoological Journal. 



Upon examining my specimens, Mr. George Sowerby found that 

 he possessed several species not in my collection. These had been 

 obtained during the voyage, and had been purchased from some 

 of the crew by Mr. Sowerby, who handsomely put his acquisitions 

 into my hands for description. 



1. Balanus Psittacus. 



Syn. Lepas Psittacus. Molina, 1., 22.3. 

 B. testa albido-rosacea, suhconica, elongata, rucli, lojigitiidinaliter 

 creberrime striatd ; radiis transversim striatis ; operculo transvershn 

 VOL. T. 2 N 



