133 MOLIvUSCA OF THE GuLF OF MEXICO lOI 



pi. 2, f. 2, a-c, 1895 (as Rangia); Dall, Tr. W. I. S. 3, p. 

 905, 1898. 

 Gnathodon, n. sp. Harris, 4th Ann. Rept. Texas for 1892, p. 

 121, pub, 1893. 



Note. — This curious shell appears to be a Spisula as the car- 

 tilage pit is not closed above. This is the second time 

 only that the species has been found. It is interesting to 

 trace it from Texas into lyouisiana. 



Distribution. — Upper Miocene : Galveston well at 2100-2249 

 feet (Harris); Jennings, L,a. — Dusen and Lyons Oil Com- 

 pany well No. I at 1 860-1 910 feet (?); Crowley No. 25 at 

 2585-2600 feet. 



Genus IVIULINSA Gray 

 lateralis Say, Jour. A. N. S. Phila., 2, p. 309, 1822 (as Mac- 

 tra); Conrad, Proc. A. . S. Phila., p. 573, '63; Holmes, 

 Post-Pl. Fos. S. C, p. 40, pi. 7, f. 9, '60; Hilgard, 

 House of Rep. Ex. Doc. i, pt. 2, p. 887, '78 ; Dall, 

 Bull. 37, U. S. N. M., p. 62, pi. 69, f. 8, '89; Harris, 

 Bull. Am. Pal. i. No. 3, p. 93, 1895 ; Dall, Nautilus 8, p. 

 27, '94; Tr. W. I. S., 3, p. 901, '98 ; Vanatta, Proc. A. 

 N. S., 55, p. 757, 1903 ; Clark, Md. Geol. Surv., p. 194, 

 pi. 55, f. 1-4, 1906; Vaughan, 2d Ann. Rept. Fla., p. 148, 

 1909 ; Dall, U. S. G. S., Water Supply Pa., 335, p. 77, 

 1914 ; Dall, U. S. G. S. Prof. Pa. 98-Iv., p. 177, 1916. 

 subtruncata Greene, 1833, not of Da Costa, 1788. 

 Distribution. — Maine to the Antilles. Miocene (of Duplin Co., 

 N. C, and Pascagoula clays, Miss.) to Recent. Gulf 

 coast. — Recent : Indian Pass, St. Joseph's Bay and 

 Crooked Island (all in Calhoun Co.), Fla.; Horn Island, 

 Miss. ; Point au Fer, Cameron, La. Pleistocene : New 

 Orleans Gymnasium well at 1200 feet. New Orleans 

 pumping station No. 7 ; Knapp's wells, Terrebonne Par- 

 ish, La,, No. 2 at 1050 to 1842, No. 3, 700 to 2029 feet : 

 Bayou City well, Beaumont, Texas, at 600 feet ; Osprej', 

 Orient and Labelle, West Fla.; Fort Morgan, Ala., well at 

 32-87, 100-112, 217-321 and 1 290-1330 feet. Pleistocene to 



