1890.] NATURAL SCIENCES OF PIIILADELPIIIA. 481 



Treasurer, Charles P. Perot. 



Conservator, ..... Dr. George A. Rex. 



Corresponding Secretary, . . . Dr. Charles SchJiffer. 

 Very respectfully submitted, 



Harold Wingate, 



Recorder. 



REPORT OF THE CONCHOLOGICAL SECTION. 



Since the last annual meeting of the Section ;?pecimens have 

 been received from forty-three sources, to the number of 1698 trays, 

 a detailed list of which will be found in the record of additions to 

 the museum. 



The most important collection received is that made by the ex- 

 pedition from the Academy to Yucatan and Mexico, under the 

 charge ot Professor Angelo Heilprin. Marine shells were collected 

 at Progreso, Si lam, Campeche, and Vera Cruz — some 325 trays in 

 all. Land shells were collected in Yucatan and Mexico at many 

 localities, to the number of 406 trays, including many species not 

 before in the collection, and a few probably new. A catalogue of 

 the marine forms has been prepared by Mr. Frank C. Baker, my 

 former assistant, for publication in the Proceedings of the Academy. 

 It will be found of great value to students of the West Indian 

 fauna, as many species are for the first time recorded from the 

 mainland. The condition of many of the specimens is not very good, 

 but this does not materially lessen their value to the zoogeographer. 

 The land and fresh-water forms are being studied by the Conserva- 

 tor of the Section, and a catalogue of them will be offered for publi- 

 cation later. 



A collection of 203 trays of land and fresh-water shells from 

 California, Idaho and Washington, purchased by the Conchological 

 Section from Henry Hemphill, increases our suites of western 

 species, and adds to the museum many new species and varieties, a 

 part of which have been described by the writer and others. 



A collection of shells, including many alcoholic specimens made 

 by Dr. Benjamin Sharp in the Caribbean Islands, adds 94 trays to 

 our suites of West Indian marine shells, and 25 trays of land species. 

 Dr. Sharp has also presented 30 bottles of excellently hardened 

 and preserved alcoholic material collected by him at Naples and 

 Villa Franca. 

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