33 AivDRicii, Eocene; Mollusc a 23 



rangular outline ; beaks small, compressed and pointed ; surface 

 with rather close set radial lines on the posterior slope ; balance 

 of the surface smooth ; teeth as in the subgenus, three or four 

 anterior and two posterior ; muscular scars shallow but plainly 

 marked. Length 5 mm. ; height 3 mm. 



Locality. — Woods Bluff beds near Ozark, Ala. 



Type. — My cabinet. 



Ostrea intermedoides, n. sp. PI. 3- Figs- 15, 16. 



Shell medium, valves rather thin ; surface in older speci- 

 men with numerous raised concentric ribs ; the lower valve bent 

 downwards near the beak ; the umbo shows radial striae ; mar- 

 gins crenulated internall}^ ; a fragment of the upper valve ap- 

 pears to be flat. Length of lov^^er valve 32 mm. ; breadth about 

 20 mm. 



Zom///j'.— Bell's Landing marl, Bell's Landing, Ala. River, 

 Ala. 



Type. — Ala. Museum of Nat. History. 



Remarks. — Have hesitated to add another oyster to our Eo- 

 cene, but 1 have been unable to find a place for this species. 

 Four lower valves and a fragment of the upper valve are in the 

 collection. The ornamentation recalls O. falco Dall from the 

 Jacksonian. 

 Psammobia Smithi, n. sp. PI. 3- Pigs. 17, 18. 



Shell large ; substance of shell thin ; oblong-ovate ; rather 

 compressed ; surface shining, with fine concentric sculpture 

 mediall}^ ; both ends coarser and elevated ; on the posterior 

 slope the laminae are rough and somewhat mammillated ; beaks 

 very small ; muscular scars distinct but shallow. Length 60 

 mm. ; height 32 mm. ; Breadth about 12 mm. 



Locality. — Gregg's Ldg. marl at Bell's Landing, Ala. Riv- 

 er, Ala. 



Type. — Alabama Museum of Nat. History, University Ala. 



Remarks. — Both valves of this splendid species are in the 

 collection. It bears a general resemblance to P. filosa Conrad, 

 but the dimensions are very different. Collected by the late H. 

 H. Smith and named in his honor. 



