FREE INSTITUTE OF SCIENCE 



607 

 TERTIARY FAUNA OF FLORIDA 



The Liinopsis pectunailaris (Lea) Conr. is a Trinacria, but Cossmann seems 

 to have found a single small valve resembling it which he identifies as 

 an Area, in which case it must belong to a distinct species. ,Gabb 

 described (1873) a Liinopsis ovalis from the Tertiary of St. Domingo 

 which is probably Oiigocene. It may be the same as L. siibangularis 

 Guppy, from the Ditrupa bed at Pontapier, Trinidad (Proc. U. S. Nat. 

 Mus., No. mo, 1896), but Gabb's species is very briefly described and 

 has not been figured. Guppy's shell is also found in the Oiigocene marl 

 of Bowden, Jamaica. 



Family ARCID/E. 



Subfamily PECTUNCULINyE. 

 Genus GLYCYMERIS Da Costa. 



Glycynicfis Da Costa, Brit. Conch., p. 170, 1778 ; Humphrey, Mus. Calonnianum, p. 50, 



1797. Type Area glycymeris L. 

 Tuceia Bolten, Mus. Boltenianum, p. 172, 1798 ; ibid., ed. ii., p. 120, 1819. First species 



Area pilosa L. 

 Axincca + Axinceoderma, Poli, Test. utr. Sicil., i., p. 32, 1791, and ii., p. 254, 1795. 

 Peetunciihts Lamarck, Prodr., p. 87, 1799 ; Hist. An. s. Vert., vi., i, p. 47, 1819 (not 



of Da Costa et al.). Type Area pectunculus L. 

 ? Deshagesia Berge, Conch.-buch, p. 80, pi. .x., fig. 9, 1847. (? err. typogr. for Des- 



/layesia.) 

 Not Glyeymcris Lam. et auct. aliis var. 



The history of this name has been detailed under Niicnla and need not 

 be repeated here. 



The Eocene species of the United States comprise, besides G. viinor and 

 G. trigonella Conr., the larger G. staminea Conr. (+ G. Broderipii Lea), G. 

 idoiica Conr., all Claibornian, and G.filosa Conr., from the Jacksonian. The 

 latter appears to include as synonymes " Glossiis" filosus Conr. (in Wailes's 

 Rep., 1854), Axincea filosa Conr. (Pr. Ac. Nat. Sci., ix., p. 166, 1858), AxincEa 

 incqjdstria and dicplistria Conr. (Am. J. Conch, i., p. 139, 1865). The two 

 latter names were given to mutations which intergrade completely according 

 to the large series I have studied. 



In the Vicksburgian Oiigocene G. arciata Conr. (1848, of which Axincea 

 intcrcostata Gabb is a synonym, as well as the unfigured A. beUasculpta Conr.), 

 a very variable species, is found. It has been with little warrant united by 

 Gabb with the Cretaceous G. hamula Morton of the Prairie Bluff horizon. 



