Notes on Tertiary Fossils with Descriptions of New Species. 79 



generic name, without description, was given and the specific 

 name altered to " trinodosa." The form is catalogued as: 



CoMPSOPLEMA TRINODOSA, Cou. The exami)les collected in Ala- 

 bama belonging to my cabinet have lately been examined by Prof. 

 W. H. Dall, who says in letter, " B :>th Mr. Stearns and myself 

 refer tlie Turbonilla frii:;e/iuiiafa, Con. to the StrcpoiiiatidLC. It be- 

 longs to a group of living forms like Goniobasis hallciibceliii, Lea, 

 G. boyldniana—postellii, floridcnsis, etc., of the same author. It 

 has nothing to do -^'wXx'Scalaiiay 



Having lately discovered two species of Physa described be- 

 low, associated in the same beds with the abo\e species, I am 

 disposed to accept the opinion of Messrs. Dall and Stearns as cor- 

 rectly placing the above shell. It should be known as Goniobasis 

 trigemvmta Con sp. 



OSTREA PANDIFORMIS, Gabb. 



This fossil was described as cretaceous, because it was 

 received from a black prairie near Yazoo City, Miss. This locality 

 is not Cretaceous but Tertiary, and a part of the Jackson group. 

 We also have it from Shubuta, Miss., and is rather common in the 

 strata holding Zeuglodon bones. It closely resembles an old and 

 large O. /nortoiiii, Gabb {panda pars). Specimens in my cabinet 

 are six inches broad from beak to ventral margin. It seems to 

 have been known to Prof. Tuomey, and was called GrypJuca 

 mutabilis by him. Osirca tuoi/ieyi Cox\. (Proc. Acad. Nat. Sciences, 

 p. 184, 1865,) is evidently the same form. It is quite probable 

 that all three names will have to be placed in the synonymy of 

 Ostrca inortonii, Gabb, {panda pars). 



Prof. R. P. Whitfield (Am. Jour. Conch, pp. 259-268, pi. 27, 

 1865) described from the collection of Prof. James Hall, a number of 

 new Eocene forms, but did not give figures of all of them. They 

 were mostly collected by the late Rev. T. J. Hale when a res- 

 ident of Mobile, Ala. Through lapse of time aud several moves 

 there have crept in some errors of locality. By the courtesy of 

 Prof. James Hall and the • kindness of Mr. C. E. Beecher, I 

 have been allowed to examine most of the original types, and 

 have had those not heretofore figured drawn for future publica- 

 tion in the Alabama State Survey Bulletins. 



The following notes are prepared from the type specimens 

 or examples compared with them : 



I. PisANiA Claibornensis, Whitfd, 



This form is undoubtedly Randla niaclnrii, Con. There are 



