377 Dominican Fossils — Maury 213 



of Born nor of Lmne. 

 Cardium {Lcsvicardium) serratum Dall (in part), Trans. Wagner Inst. 



Sci., vol. 3, pt. 5, p. 1110, 1900. 

 Cardium (Lcevicardium) serratum Brown and Pilsbry. Proc. Acad. 



Nat. Sci. Phila., p. 367, 191 1. 

 Certain of our fossil Lczvicardia seem identical with speci- 

 mens of serratum living on the Monte Cristi beach. This species 

 is common in the Miocene-Recent faunas and also occurs at Bow- 

 d en and Gatun. 



Localities. — Exp'd '16) Zones E, F, G, Rio Gurabo at Los 

 Quemados ; Bluff 1, Cercado de Mao; Samba Hills, approxi- 

 mate altitude 540 feet. 



Cardium (Ltzvicardium) venustum Gabb 

 Plate 36, Figure 9 

 Cardium venustum Gabb, Trans, Amer. Phil. Soc, vol. 15, p. 251, 



1373- 

 Cardium {Lesvicardium) serratum Dall (in part), Trans. Wagner Inst. 

 Sci., vol. 3, pt. 5, p. mo, 1900. 



A number of our fossils differ somewhat in form from typical 

 serratum, the ribbing is more distinct and the umbones fuller. 

 They correspond to Gabb's description of his unfigured C. venus- 

 tum. Dr. Dall united venustum with serratum and it may be 

 that a larger series would show this to be true. I simply indi- 

 cate the difference exhibited by shells in our collection. 



Locality. — (Exp'd '16) Bluffs 2 and 3, Cercado de Mao. 



Genus Protocardia Beyrich 

 Protocardia gztrabica, n. sp. 

 Plate 36, Figure 10 

 Shell resembling the Vicksburgian Oligocene P. diversa Con- 

 rad, but differing in the following respects: — (1) the posterior 

 sculpture in diversa consists of about twenty to twenty-five very 

 sharply defined, highly raised, radiating threads with wider inter- 

 spaces ; in our fossil there are about forty-three crowded, flat- 

 tened, slightly wavy threads with interspaces much narrower, re- 

 duced to mere lines ; (2) in diversa the ending of the posterior 

 sculpture is defined simply by a slightly heavier radiating thread 



