1895.] NATURAL SCIENCES OF PHILADELPHIA. 119 



aud other fossils similar to those occurring in the dark green sand 

 and greenish black clay as ^een in the Jones' well near Hurricane 

 Bayou, where it has a known thickness of fourteen feet. Brown 

 clays with pebbles occur near Hague's gin four miles northeast of 

 Jones' well, and gray and bluish yellow clays with calcareous 

 nodules can be traced as far south as the same place where they have 

 a thickness of five feet aud are underlaid by the same brown sand, 

 five to six feet thick, as found in No. 3 of the Elkhart section. 



On the Trinity River we have the section well exposed in a series 

 of bluffs extending from Alabama Bluff on the south to the northern 

 edge of Houston County. The section at Alabama Bluff gives the 

 contact with the overlying Yegua clays and shows a slight uncon- 

 formability between the two stages. Omitting the upper portion of 

 the section we have : 



4. Fossiliferous greenish-blue clay 4 feet. 



5. Green sand altered to a brownish-yellow sand 



with thin strata of ferruginous material inter- 

 stratified and containing Vohula eonradiana 

 Gabb, Conus sauridens Conrad, Pleurotoma 

 (Surctdcb) yabbii Con., PL (Cochlespira) en- 

 gonata Con., PL (Surculd) moorei Gabb, PL 

 (Drillia~) nodoearinata Gabb, PL sp. , Ancilla 

 (Olicula) staminea Con., Aitomia ephippioides 

 Gabb, Pliratitla filamentosa Con., Trigonarca 

 pulehra Gabb, T. corbuhides Con. , Leda hous- 

 tonia Harris, Pseudoliva vetusta Con. var., Voluti- 

 lithes jjetrosa Con. , Caricella demis$a,Ym: texana 

 Gabb, Turricula (Conomitra) texana Harris, T. 

 polita Gabb, Latirus moorei Gabb, Corbula ala- 

 bamensis Lea, Cadulus sub-coarcuatus Gabb, 

 Fusus mortoni, var. mortonopm Gabb, Clavili- 

 thes penrosei Heilprin, Phos texana Gabb, Diu- 

 tortio septemdentata Gabb, Cassidaria planotecta 

 Aid., Solarium bellastriatum Con., Natica arata 

 Gabb, iV. limula Con., Mesalia claibornensis 

 Con., Turritellu nasuta Con., Spirorbis leptos- 

 toma Swaiu, Tarbinolia pharetra Lea . . . 5 to 6 feet. 



6. Ferruginous sandstone with iron- ore .... 1 to 2 " 



7. Green sand and ferruginous material same as No. 



