TRANSACTIONS OF WAGNER 

 1536 



TERTIARY FAUNA OF FLORIDA 



valve with a prominent, acute, hardly recurved beak, with a small peduncular 

 foramen, the deltidial plates, etc., as above described ; hinge-line somewhat 

 flexuous, anterior margin of the valve with a broad double fold produced 

 hasmall}', with two or three less pronounced plications laterally ; haemal valve 

 convex, reciprocally plicate ; interior filled with a hard matrix ; shell structure 

 fibrous. Length 11. o, breadth 9.5, dorsoventral maximum diameter 6.0 mm. 



This pretty little species appears to be rare, as only two specimens were 

 obtained. 



Rhynchonella Holmesii n. sp. 

 Plate 58, Figures 10, 11, 12. 



Eocene limestone of the city quarry, Wilmington, North Carolina ; Vaughan. 



Shell small, rounded trigonal when young, much more transverse when 

 adult, smooth near the beaks, plicate in front and over most of the valves ; 

 the ventral valve with a small, erect beak with a moderate foramen, the del- 

 tidial plates united in front of it; anteriorly the margin is slightly, convexly 

 flexuous, the valve evenly, uniformly, radially sculptured with twelve to four- 

 teen subequal rounded ribs with narrower interspaces ; haemal valve more con- 

 vex, reciprocally plicate ; the ventral valve has no median septum, but the 

 presence of a hard matrix prevents inspection of the interior characters. 

 Length of haemal valve of an adult 9.5, breadth ii.o, diameter 5.0 mm. ; of a 

 ventral valve, length 10.5, breadth 11. 5, diameter 3.0 mm. 



The specimen figured is a young shell, the adults being more or less frag- 

 mentary. It is named in honor of Dr. F. S. Holmes, to whom are chiefly due 

 the fine monographs on the Post- Miocene fauna of SoLith Carolina. 



Family TEREBRATULID^. 



Genus TEREBRATULINA Orbigny. 



Terebratulina lachryma Morton. 



Terebratula lachryma Morton, Syn. Org. Rem. Cret. U. S., p. 72, pi. x., fig. 11, and pi. 



xvi., fig. 6, 1834. 

 Terebratulina lachryma Conrad, Am. Joiirn. Conch., i., p. 15, 1865. 



Eocene limestone of Wilmington, North Carolina ; near Charleston and on 

 the Ravenel plantation, South Carolina ; in the artesian well at Albany, 

 Georgia, at a depth of two hundred and thirty to two hundred and forty feet, 

 and from the Jacksonian Eocene of Choctaw County, Alabama ; Burns. 



The Alabama specimens are nearly all more or less flattened by pressure 

 and thus appear wider than those from the Carolinas, but the occasional normal 

 specimens do not differ. 



