158 PROCEEDINGS OF THE ACADEMY OF 



the bones of the maxillary and mandibular arches is not more 

 important than many other structures found in the same subclass. 

 He regarded the Lophohranchii as a group having the same 

 general affinities with the Physoclysti, but aberrant with some 

 other groups in the possession of abdominal ventral fins. It 

 was closely related to another division of the Physoclysti which 

 he called the Hemihranchii^ which has ventral fins, and wants 

 one or more of the outer series of the superior pharyngeal bones, 

 besides other characters. This order embraces the Fistulariidse, 

 Centriscidx, and Gasterosteidse, and should perhaps include the 

 Lopliobrancliii also. 



June 20. 



The President, Dr. Ruschenberger, in the chair. 



Sixteen members present. 



The following paper was presented for publication: — 

 "S^-nopsis of the genus Chettusia (LobivaneUus), with a descrip- 

 tion of a new species." By J. A. Ogden. 



June 27. 

 The President, Dr. Ruschenberger, in the chair. 

 Twenty -one members present. 



The following gentlemen were elected members: — 



Fred'k W. Endlich, Edw. K. Williams, and Fred'k Gutekunst. 



Gen. L. E. Yorke, of Cincinnati, Ohio, was elected a corre- 

 spondent. 



On favorable report of the committees, the following papers 

 were ordered to be published : — 



[August 15, 



