183 St. Maurice and Claiborne Pelecypoda 183 



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

 in Western Alabama, same horizon. 



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

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

 is also more rounded. 



With sotoensis as a name for the rather marked variety just 

 referred to its seems unnecessary to give a special name to the 

 intermediate forms from Hickory and the Sabine. 



It is quite possible that the Verticordia we figured from the 

 Midway 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 dalliana seems to be a modification of 

 soioe7isis, found in somewhat higher Eocene or Oligocene beds. 



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

 the typical section of the group and has from thirteen to sixteen 

 ribs, a minutely 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 impressed lines radi- 

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

 but shallow sinuation." 



Type. — 



Horizon. — St. Maurice and Claibornian ; possiblj^ also Mid- 

 way to Jackson. 



Spemnens Jig7ired. — Paleont. Mus. Cornell Univ. Others 

 copied from Aldrich. 



Localities. — Sabine River, Tex., opposite S. W. cor. S. E. 

 % sect. 35, 13 W., 5 N. — Veatch. 



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



Cuspidaria prima var. multiornata Aid. & Mr., PI.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 /rzV^za, see these Bulletins, vol. 2, p. 266, 

 pi. 20, fig. 14. 



Aldrich and Meyer's description of multiornata reads as 

 follows : 



