1 6 - BULIvETlN 31 ^6 



The number of |)lications varies greatly, see pi. 10. 



This species seems to have a very limited range, from Cune- 

 cah River, Ala., to Newton, Miss. 



Type— Aldxich Coll. (Johns Hopkins Univ. Mus.) 



Horizon. — St. Maurice. 



Specimen figured. — Cornell Univ. Mus. (11-13, Caton's 

 Bluff ; 15, Uisbon, Ala.) 



Localitiei>. — Claiborne, I^isbon, Nev^^ton, {fide Aid.) also at 

 Caton's Bluff, Conecuh River, Ala. 



Anomiaephippioides PI- n- Figs- i-3- 



A. ephippioides Oahh, Ja. Phila. Acad. Nat. Sci., 2d Ser., vol. 4, i860, 



p. 388, pi. 67, fig. 59- 

 A. ephippioides Dall, Trans. Wag. &c., vol. 3, 1898. p. 782. 

 Gabb's original description. — "Very irregularly sub-quadrate, some- 

 times verj' nearly circular, sometimes almost triangular ; convex, occasion- 

 ally marked by longitudinal rugte, and always by distinct lines of growth ; 

 lower valve, the muscular foramen large, ligament margin thickened. 

 Size of largest specimen: Length 1.5 in., width 1.3 in." 



This species in a general way resembles A . simplex of our 

 coast (sometimes called A. ephippium, hence Gabb's name). 

 Specimens when well preserved show a peculiar postulose exter- 

 ior, the pustules in some instances becoming elongated. 



Although Gabb's types are supposed to be in the Phila. 

 Academy's collection none there show the "lower valve." This 

 with a larger form usually referred to lisbonensis occurs in great 

 abundance from the Rio Grande to the Sabine almost wherever 

 the St. Maurice beds are represented. 



Although specimens of Anomia are abundant in the Uower 

 Claiborne (St. Maurice) of Uouisiana, the pustulate type becomes 

 rare and the generally larger, smooth lisbonensis predominates. 



Type.—V\n\^. Acad. Nat. Sci. 



Horizon. — St. Maurice Kocene. 



Specimens figured. — Cornell Univ. Mus. 

 Localities. — From 13 mis below I^aredo, northeastward through- 

 out Texas to the Sabine about Sabinetown. 



