AMEEICAN 



JOURNAL OF C0NCH0L0GY. 



NEW SERIES 



lTULLSHED BY THE 



JONCHOLOGICAL SECTION of the Academy of Natural Sciences of Philadelphia 



Vol. VII. 1871. Part 1. 



Meeting January 5th, 1871. 



Eight members present. 



Dr. W. S. W. Ruschenberger, Director, in the chair. 



Various donations to the Museum and Library were announced. 



The following papers were read and referred to committees : 



" Descriptions of some new types of Palaeozoic Shells." By 

 F. B. Meek. 



" Descriptions of new species of Nudibranchiate Mollusca in- 

 habiting Polynesia, No. 2." By Win. Harper Pease. 



Mr. Tryon read extracts from a letter from Mr. Wm. M. Gabb, 

 of St. Domingo, referring to the tenacity of life in the genus 

 Littorina. Specimens of L. muricata, collected by Mr. G. in 

 Sept., 1870, and forwarded by him to the Section, were ex- 

 hibited, being apparently as healthy and active as if just taken 

 out of the water. 



Mr. S. R. Roberts exhibited a second specimen of the rare 

 rayed variety of Unio ct/Undricus, Say. This individual was 

 collected by Mr. Roberts in the Wabash river, Ind. 



