FREE INSTITUTE OF SCIENCE 



6O7 

 TERTIARY FAUNA OF FLORIDA 



The Liinopsix pcctiinciilaris (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 Linwpsis oralis from the Tertiary of St. Domingo 

 which is probably Oligocene. It may be the same as L. subangularis 

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

 Mus., No. 1110, 1896), but Gabb's species is very briefly described and 

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

 of Bowden, Jamaica. 



FAMILY ARCID/E. 



Subfamily PECTUNCULIN/E. 

 Genus GLYCYMERIS Da Costa. 



Glycynit-ris Da Costa, I.rit. Conch., p. 170, 1778; Humphrey, Mus. Calonnianum, p. 50, 



1797. Type Area glyeymcris L. 

 TH,, -tit ISolten, Mus. Boltenianum, p. 172, 1798 ; ibid., ed. ii., p. 120, 1819. First species 



Area pilosa L. 



Axinica, -{- AxttuepdemUl, Poli, Test. utr. Sicil., i., p. 32, 1791, and ii., p. 254, 1795. 

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



of Da Costa et a/.). Type Area pciliinculus L. 

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



kaytsia.) 

 Not Glyty men's Lam. et auct. aliis var. 



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

 be repeated here. 



The Kocene species of the United States comprise, besides G. minor and 

 G, tngonella Conr., the larger G. stnminca Conr. ( | G. l'>n>i(crifii Lea), G. 

 idoiica Conr., all Claibornian, and G. fil<>su Conr., from the Jacksonian. The 

 latter appears to include as synonymes " Glossns" jUt>stis Conr. (in Wailes's 

 Rep., 1854), Axiiuca Ji/osa Conr. (Pr. Ac. Nat. Sci., ix., p. 166, 1858), Axiiuea 

 iiii't/iiistria and iin/>lixtria Conr. (Am. J. Conch, i., p. 139, 1865). The two 

 latter names were given to mutations which intergrade completely according 

 to the large scries I have studied. 



In the Vicksburgian Oligocene G. arctata Conr. (1848, of which Aximea 

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

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

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



