I02 BuLivETiN 34 134 



Miocene : Galveston well, 300-2920 feet (Harris). Mio- 

 cene : Jeunings-Heywood Oil Syndicate's well No. 27 at 

 1970-1980 feet; Gilbert well, No., 10, Bateson, Hardin 

 Co., Tex., at 323 feet. 

 lateralis variety corbuloides Deshaj^es, Proc. Zool. Soc, p. 

 63, 1854; Reeve, Conch. Icon., Madra, f. 103, 1854; 

 Dall, Nautilus, 8, p. 27, 1894. 

 rostrata Philippi, Abbild u. Beschr. 3, p. 138, pi. 3, f. 6, 

 1845. Not of Spengler, 1802. 

 Distribution. — With the typical form but generally in its 

 southern range. Gulf coast. — Cameron, Point au Fer, 

 La. ; Galveston, Corpus Christi, Sabine Pass, etc., Texas. 

 Pleistocene : New Orleans pumping station No. 7 ; Grand 

 Chenier, La. ; Osprey, West Fla. 



sapotilla Dall, Tr- W. I. S., 3, p. 902, pi. 28, f. 7-9, 14, 1898 ; 

 Proc. U. S. N. M., 46, p. 228, 1914. 

 Distribution. — Pliocene : Alexandria, La., well at 49 feet ; 

 Producer's Oil Co. 's well, Pine Prairie, La. at 1540 feet. 

 Ver)^ characteristic Caloosahatchie River marl, Fla. and 

 also in the brackish water Pliocene of theSatillaRiver.Ga. 



quadricentennialis Harris, Bull. Am. Pal., vol. i, No. 3, p. 11, pi. 

 2, f. 3, a, b, 1895, C^s Madra). 

 Madra, n. sp. Harris, 4th Ann. Rept. Texas Geol. Surv., p. 

 121, 1893. 

 Note. — This species resembles sapotilla Dall, but is in earlier 



horizons. 

 Distribution. — Upper Miocene, in deep wells of Texas and 

 Louisiana. Type locality. — Galveston well at 2236-2871 

 feet (Harris); Jennings, La., wells : Teche No. i at 11 58- 

 1190 ; Producers, Latreille tract, No. 3, at 1975, No. 

 4 at 1720-1750, 1800-1860, No. 8 at 1990-201 2 ; Zigler No. 

 15 at 1700-1745, 1745-1770 ; Crowley No. 19 at 1880-1885, 

 1940-1955, No. 24 at 1923-1935, No. 25 at 1830-1860, No. 

 36 at 1 680-1700, 1800- 1 880 ; Jennings Hey wood Oil Syndi- 

 cate well No. 29 at 1941-1961 feet. 



