NATURAL SCIENCES OF PHILADELPHIA. 75 



March 2ith, 

 Vice President Bridges in the Chair. 



The following communications were presented for publication in the 

 Proceedings. 



1. Synopsis of the species of Clivina and allied genera inhabiting 

 the United States, by John L. LeConte, M. D. 



2. Investigation of the Rock Guano of the Islands of the Caribbean 

 Sea, by W. J. Taylor. 



3. Description of six new species of Unio from Alabama, by Isaac 

 Lea. 



4. Description of eight new species of Naiades, from various parts 

 of the United States, by Isaac Lea. 



6. Description of three new exotic species of Naiades, by Isaac Lea. 



6. List of Extinct Vertebrata, the remains of which have been dis- 

 covered in the region of the Missouri, with remarks upon their geologi- 

 cal age, by Joseph Leidy, M. D. 



And were respectively referred to Committees. 



Mr. Cassin announced the death of Mr. John A. GuEX, late a mem- 

 ber of the Academy, and alluded to the enthusiasm of Mr. Guex as an 

 entomologist, and to his distinguished liberality in adding to the mu- 

 seum of the Academy his magnificent collection of Coleoptera. 



March Slst. 

 Vice President Bridges in the Chair. 



The following papers on report of the Committees to which they 

 were referred, were ordered for publication in the Journal. 



On the Caducibranchiate Urodele Batrachians, by Edward Hallowell, 

 M. D. 



On Trignophrys rugiceps, by Edward Hallowell, M. D. 



And the following for publication in the Proceedings. 



Synopsis of tlie species CLIVINA and allied genera inhabiting the United States 

 BY JOHN L. LECONTE, M. D.* 



DYSCHIRIUS Bon. 

 A. Elytra stria vel interstitio 3io tripunctato. 



A. Epistoma bisinuatum ; elytra stria basali integra. 



a. clypeo tridentato ; 



•18, Antennis nigris, thorace globoso, elytrorum 



striis integris 1. tridentatus Lee. 



b. clypeo dente intermedio obsolete, lateralibus acutis ; 

 •14, Antennis pedibusque nigerrimis 2. patruelis Lee. 

 •13, Antennis basi, pedibusque posterioribus rufis 3. basalis Lee. 

 (•13, Pedibus antennisque brunneis, his basi testaceis, 



thorace antice angustato, 4. Dejeanii Puiz. 



* The species which I have not seen are enclosed in a bracket ; in some in- 

 stances I have not been able to discover their characters from the description. 



1857.] 



