Tite Sfrafiffrd/i/ii/ of Y. ]\\ LonisitiiKi. — I'fouf/ioii. 228 
Rosefield, near Centreville, crosses Little river five miles below 
Georgetown and reaches the Red river five miles north of 
Colfax. 
Some of the fossils found in the Jackson of Louisiana are: 
Zfuglodon. PocU'ii iiiipcrus Con. 
Umbrella plaiuilata Con. Pectenculus filosiis Con. 
Conns lortilis Con. Vencricardia plaiiicosta Lam. 
Conorbis alatoides i\i,i). jacUsont'iisis Con. 
Cassidaria petersoni C"on. ('i-assatella Ht'xura Cox. 
Tiirritella alveata Con. Corbiila bicarinata Con. 
Xenophora rcclusa Con. Flebellum cuiieiforine Lons., var. 
.'\,malthea amerieana Con. wailesii Con. 
Natica permvaida Con. Ti'ochoc\athus In ii u 1 i t i I' o r m i s 
Oslrea trigonalis (JoN. Con., and many (itiicrs. 
Fossils of the Vicksburg stage were collected at only one 
locality by the Louisiana Geological Survey, viz., three miles 
sou til of Rosefield. 
Some of the fossils found here were: 
Dt-ntalium mississippiense Con. Pcctunciiliis arctatns Cox. 
Ostrca \ icksburgensis Cox. Crassatella missis.sii)pi('n.sis Cox. 
Pecten [)oiilsoni MoRTox. Meretrix sobrina Cox. 
Area mississippiensis Con. Eupsammia caulifera Cox. 
IJyssoarca lima fox. Orbitoidcs mantelli Mortox. 
In the American Journal of Science, 2d ser., vol. xlviii, 
18G9, p. 340, Dr. Hilgard mentions Orbifoides, Fecten poiilsoui, 
and Osirea vicksbur(jensis, from the heads of Bear creek between 
Dugdemona bayou and the Red river. On p. 33 of his "Sup- 
plemental and Final Report of a Geological Reconnoissance of 
Louisiana," he refers to this same locality as "seven miles 
(west) from Little River Ferr3^" 
In the American Journal of Science. 3d ser.. vol. xxx, 1885, 
p. 269, the same writer mentions Orbitoifle.s, Area iiu'.ssi.ssipp). 
ensis, and Peclen poifhoni, from Bayou Funne Louis. 
We possess the following data regarding Vicksburg rocks 
west of Red river. Dr. Hilgard states in the American Journal 
of Science, 2d ser., vol. .xr.viii, IHGK, p. 839, "At the base of 
the Grand (iulf rocks we find, on bayou Taureau, a seam of 
shell limestone with Vicksburg fossils." On page 19 of his 
Supplemental and Final Report of a Geological Reconnois- 
sance of Louisiana, lie mentions Area mis.sissijijn'e./i.sis from 
this locality. 
