PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 291 

 NOTE ON ENDOTnVRA ORNATA. 



By C. A. WHITE. 



Among the fossils obtained by Prof. O. St. John from the Carbonifer- 

 ous strata of the region of the T6ton Mountains, southward from the 

 Yellowstone l!»rational Park, are some fragments of a dark silicions lime- 

 stone, adhering to the weathered surfaces of which are some small glob- 

 ular foraminifera. ]S"one of them are in an entirely satisfactory con- 

 dition of preservation, but their internal structure is very well shown 

 in some cases. Samples of these objects have been submitted to Mr. 

 Henry B. Brady, F. R. S., whX)se labors with the foraminifera are so well 

 known. He mentions in reply the difficulty of being absolutely sure in 

 the determination of weathered specimens, but still thinks, without any 

 doubt, they are samples of Endothyra ornata Brady. (See Brady's 

 Monog. Carb. and Perm. Foram. p. 99, pi. vi, tigs. 1-4.) The discovery 

 of this form in that far- western region is interesting since it has hith- 

 erto been found only in England, Ireland, and Scotland. Another form 

 of Endothyra, however, JEJ. baileyi {^^Botalia baileyi Hall) is found in the 

 lower Carboniferous strata of Indiana. 



NOTE ON CRIOCAROIUiJI AND ETHIHOCARDIIJrn. 



By C. A. IVHITE. 



The subgenus Griocardium was proposed by Conrad to receive the 

 shells of that section of the genus Cardium which bear spines upon the 

 interspaces between the ribs. Besides the type indicated by him ( G. 

 dumosiim) which has "long slender spines between the ribs," there are 

 several European forms which are plainly referable to this section, among 

 which are G. productum Sowerby ; G. moiUonianum d'Orb., and G. caroU- 

 num d'Orb. xVll these sheUs have distinct spines or tubercles, or both, 

 occupying all the interspaces between the ribs ; those upon the anterior 

 and posterior portions of the valves being longer and more conspicuous 

 than those upon the middle portion. 



In adopting this subgenus Mr. Meek (U. S. Geol. Sur. Terr. vol. ix, 

 4to ser., p. 109) referred to Griocardium the Gardmm speciosum of Meek 

 & Hayden, supposing it to bear spines or tubercles upon its intercostal 

 spaces. In the An. Eep. U. S. Geol. Sur. Terr, for 1877, p. 183, I took 

 occasion to state that among numerous examples of this shell which I 

 had examined, no trace of either spines or nodes was detected, but that 

 in place of them the test was perforated with minute holes. Subsequent 

 examination of portions of the shell of authentic examples, having the 

 natural surface in a better state of preservation than any before exam- 

 ined, shows that these small perforations are ])erfect apertures through 

 the whole substance of the test, the border of each one being distinctly 



