102 



February 18, 1846. 



The President in the Chair. 



A letter from J. G. Norwood, M. D., of Madison, Indiana, 

 communicated by Prof. H. D. Rogers, was read. 



Dr. Norwood announced the discovery of fossil fishes, at a 

 locality sixteen miles north of Madison. They are, probably, of 

 the genus Ceplialaspis. He believes them to be the first fossils 

 of the kind found in the west, and hopes that they may aid in 

 determining the western equivalents of eastern and foreign forma- 

 tions. He expressed an intention of publishing a description of 

 the fossils and of their position. 



A letter from W. H. Barris, of Ellsworth, Trumbull 

 county, Ohio, was read. It accompanied a crystal (hemi- 

 trope) of Selenite, found, imbedded in a stratum of blue 

 clay, in that vicinity. 



A paper was read, communicated by Prof. C. B. Adams, 

 containing descriptions of undescribed species of shells, from 

 the island of Jamaica, viz., 



Planorbis pallidus. p. t. dextra convexa, apice depressa, 

 sinistra, concava ; anfractibus vix tribus, ultimo maximo ; aper- 

 tura maxima, transversa. 



Diam. .4 ; alt. .125 poll. Hab. Jamaica. 



Cyclostoma MARiTiMUM. C. t. clougata, decollata, aurantia, 

 costulis exilibus plurimis eleganter ornata ; sutura exile crenulata ; 

 anfractibus duobus perditis, septem reliquis ; umbilico minimo ; 

 apertura ab anfractu penultimo disjuncta, supra angulata et auri- 

 culata ; labro acuto. 



Div. 30°. Alt. .63 ; lat. .27 poll. Hab. Jamaica. 



Helicina affinis. H. soUtarice, nob., affinis, sed t. spira 

 conica baud convexa, instructa ; labro reflexo, infra angulato, 

 baud scisso. Hab. Jamaica. 



Pupa rosea. P. cylindro, Desh., afiinis, sed t. rosacea, costu- 

 lis parvulis distantibus ornata. Hab. Jamaica. 



