T6 PALiEONTOLOGY OF NEW- YORK. 



Oeniis STUOPIIOMENA (Rafinesque). 



The Genus Strophomena of Rafinesque has for its type the S. rugosa = 

 S. rhomboidalis, Wahlenberg ; a species which ranges from the Lower Si- 

 lurian to the base of the Carboniferous system inclusive, appearing under 

 various aspects in the successive geological stages. The species has been 

 already fully illustrated in the preceding volumes of this work, and it is 

 only necessary to give the more important among the varieties of form 

 in the succeeding formations. 



Restricting the genus to such forms as may properly be grouped with 

 ihe typical species, we find no species of Strophomena proper in the 

 Devonian; and indeed it may be doubted. whether any other species of 

 this genus occurs above the Middle Silurian. 



StropluHiu'iia rlioiiilM>i(lalis. 



PLATE XII. 



Dritte Anomltcn art mlt breiter schlosskante : Hcpsch. Naturgeschichte des Niedcrdeutscliland, 1781. 

 Vol.i, pa. 15, 1.1,1, f. 7 &8. 



Jtnomitet rhomboidalis : Wablenbebq, Acta Soc. S. UpsaliensU, 1821, Vol. viii, pa. G5, n" 7. 



Producta depreita : Soweeby, Genera of Shells; & Min Conchologj', 1826, Vol.v, pa. 80, pi. 459, f. 3. 



Producta depretta : Hisimgeb, Vet. Acad, llandlingar, 1820, p. 33. 



Productxa dtprtttut : Demujios, Diet, dcs Sctenueii uaturulles, 1826, Vol.xlvii, p. 853. 



Leptana rugusa ; Dalman, Vet. Acad. llandlingar, 1827, p». 106, pi. 1, f. 1. 



Ltptana depretta : Id. lb., pa. 107, pi. 1, f. 2. 



Strophomena rugosa : Bromn, Leth.geognostica, 1885, Vol.1, pa. 87, pi. 2, f. 8. 



Producta dtprtssa : Phillips, Geo! . Yorkshire, ia30, Vol.ii, pa. 215, pi. 8, f. 18. 



Producfus depressvs : De8hat(:s, Lamarck animaux sans vertebres, 2d edition, Vol. viii, p. 380. 



Ltptana rugosa and L.depresta : Hisinoer, Leth. Succica, 1887, pa. 09, pi. 2, f. 2 & 3. 



Orlhis rugosa ; Von BccH, Ueber Delthyris, 1837, p. 30. 



Ltptana .- Fiscreb, Oryct. da Goiiveniement du Moscou, 1837, p. 142. 



Ltptana deprtssa : J. Soweebt, in Murchison Sil. System, 1839, pa. 623 & 636, pi. 12, f. 2. 



L. ttnuistriata [?] : Id. lb., pa. 646, pi. 22, f. 2 a. . 



L. rugosa : Id.. Trans. Geol. Soc. Loudon, 1840, 3d series, Vol. v, pi. .W, f. 4. 



Orthis rugosa : Eicbwald, Sil. System in Esthland, p. 102. 



Ltptana rugosa : Phillips, Pal. Fossils, 1841, pa. 57, pi. 24, f. 95. 



Ltptana dtprtssa : De Korinck, Desc. An. fossiles de Belgique, 1842, pa. 215, pi. 12, f . 3 - 6; and 



pi. 13, f. 6. . ' 



Ltptana dtprtssa : G. B. Soweeby, Conch. Manual, 1842, pa. 71 & 300, f. 206. 



Orlhis rugosa : D'Archiac ct De Verneuil. Trans. Geol. Society London, 1842, 2d series, Vol. ii, 

 part 2, p. 89»i, 



