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PROCEEDINGS OF THE 



[Dec, 1857. 



Resolved, That Dr. Miles' resignation, as Treasurer, be 

 accepted, and that he be requested to retain his position as a 

 Curator. 



Dr. Miles signified his acceptance. 



DECEMBER 15th, 1857. 



Vice President, W. Wragg Smith, in the chair. 



Dr. Edmund Ravenel, presented Cranium of Chelonia 

 mydas, from Key West. 



The Corresponding Secretary read a letter from the Geolo- 

 gical Society of London, acknowledging the receipt of the 

 Proceedings of this Society, from November, 1856, to April, 

 1857. No. 3. 



On the development of two species of Ctenophora found in Charleston 

 Harbor. By John McCrady. 

 Plate 14. 



So little has hitherto been ascertained with regard to the em- 

 bryology of the Ctenophorous Medusas, that I suppose the following 

 observations, though not complete, will not be deemed without 

 value : 



From time to time, since the commencement of? my researches 

 in Charleston Harbor, I had observed the three following forms of 

 Beroidea: — First, a Beroe, (much resembling the B. punctata of 

 Eschscholtz, found north of the Azores,) measuring in large spe- 

 cimens more than two inches in length; second, a Cydippe, 

 generally very small, but of various sizes, the largest, however, I 

 think, never exceeding the quarter of an inch in diamater; third, 

 a Bolina, belonging to the same type as that so elegantly figured 

 and described by Prof. Agassiz, from Boston Harbor. The first 

 of these, for lack of proof to the contrary, I shall consider, for the 

 present, identical with the Eschscholtzian species B. punctata. 

 To the second, I shall give no name, for reasons presently to 

 appear; and, the third, I propose to call Bolina littoralis, my first 

 acquaintance with it having been derived from the numerous 

 specimens thrown up at some seasons upon the beach of Sullivan's 

 Island. 



