(91) Galveston Well Fossils 9 



CARDIUM. 

 Cardiuvi galvestonense, n. sp. PI. i, fig's 3, a. 



Syn. Cardium, sp. nov., Har., 4th Ann. Rep., &c., p. 121. 



Specific characterization.- Form as indicated by the figures; 

 surface marked by about 19 strong ribs, beautifully striated^ on 

 their sides and in the interspaces with even, sharp concentric lines 

 and bearing on their summits a row of strong pustules, except in 

 the vicinity of the umbones. 



This species is in many respects intermediate between haitense 

 Sowerby and antillariim d'Orb. From the former it differs in 

 having fewer ribs, in being not quite so oblique or elevated ; from 

 the latter it differs in having about one more rib, in having the 

 ribs of more nearly equal size, in having a comparatively longer 

 posterior margin, and in having a more nearly rectangular outline. 



Range in depth. — From 2,443 to 2,871 feet. 



Cardium sp., probably magnum Born. 



Range in depth. — From 2,552 to 2,600 feet. 



VENUS. 



Venus, fragments, doubtless of some of the large varieties of mer- 

 cenaria common in the upper Miocene, Pliocene and recent 

 formations. 



Range in depth. — From 2,236 to 2,600 feet. 



CHIONE. 



Chione ulocynna. 



Syn. Venus idocymaV)z}L\, Coll. U. S. Nat. Mus., MS. 



Chione, n.'sp. , Florida Miocene form, Harris, 4th Ann. 

 Rep. Geol. Surv. Tex., p. 121. 



So far as I am aware this species has never been described. It 

 has somewhat the form of C. cancellata though rather more sharp- 

 ly triangular ; the concentric lirations are rounded and close-set 

 on the face of the valves but both anteriorly and posteriorly 

 change in character and become irregularly lamelliform ; numer- 

 ous radiating lines pass over the rounded concentric rugae ; mar- 

 gin within finely and sharply crenulate. 



This species was first collected by F. Burns from the upper fos- 

 siliferous bed at Alum Bluff, western Florida. It is therefore an 

 upper or Yorktown Miocene form. 



Range in depth. — From 2,236 to 2,650 feet. 



