183 St. Maurice and Claiborne Pelecypoda 183 



Localities. — Claibornian of De Soto and Mcl.eod's Mill, Miss., and 

 in Western Alabama, same horizon. 



This species closely resembles V. dal liana, nobis, but differs in the 

 number of ribs and the absence of one space which appears on the other. It 

 is also more rounded. 



With sotoeyisis as a name for the rather marked variety' just 

 referred to its seems iinnecessarN'^ to give a special name to the 

 intermediate forms from Hickory and the Sabine. 



It is quite possible that the ]'erticordia we figured from tlie 

 Midwa}^ Eocene (these Bulletins, vol. i, pi. 16, fig. 16) some 

 years ago without naming it, should be referred to a variety of 

 eocensis. But we have no connecting forms as yet from the Sa- 

 bine stage. Aldrich's a'a/Zz^wa seems to be a modification of 

 sotoensis, found in somewhat higher Eocene or Oligocene beds. 



Of this species Dall has well remarked: "This belongs to 

 the t^'pical section of the group and has from thirteen to sixteen 

 ribs, a minuteh' granulose surface, moderately convex valves, 

 and is well figured by Aldrich as above noted. The inter-spaces 

 between the ribs usually show one or two impres.sed lines radi- 

 ating in harmony with the ribs. The pallial line has a distinct 

 but shallow sinuation." 



Type. — 



Horizoji. — St. Maurice and Claibornian ; possibly also Mid- 

 way to Jackson. 



Speciynens figured. — Paleont. Mus. Cornell Univ. Others 

 copied from Aldrich. 



Localities. — Sabine Riv^er, Tex., opposite S. W. cor. S. E. 

 Yx sect. 35, 13 W., 5 N. — Veatch. 



Hickory, Miss. Claiborne sand bed, Claiborne, Ala. 



Cuspidaria prima var. multiornata Aid. & Mr., P1.55. Figs. 18-20 



Necera {Cardiomya) multiornata Aid., & Mr., Cinn. Soc. Nat. Hist., 

 vol. 9, pt. 2, 1886, p. 46, pi. II, fig. 19. 

 For Aldrich's description of />/7V;/a, see these Bulletins, vol. 2, p. 266, 

 pi. 20, fig. 14. 



Aldrich and Mej^er's description of multiornata reads as 

 follows : 



