2 PROCEEDINGS OF THE NATIONAL. MUSEUM. vol.60. 



OSTEOLOGY OF SAN I W A. 



Suborder Sauria. 

 Family VARANIDAE. 



Genus SANIWA Leidy. 



SANIWA ENSIDENS Leidy, 1870. 



Haniwa ensidens Leidy, Proc. Acad. Nat. Sci. Phila.. 1870, p. 124 ; U. S. 

 Geol. Surv. of Wyo. and contiguous Terr., 2nd (4th) Ann. Rept, F. V. 

 Hayden, U. S. Geologist, 1871, p. 368; U. S. Geol. Survey of Montana 

 and portions of adjacent Terr., F. V. Hayden, U. S. Geologist, Washing- 

 ton, D. C, 1872, p. 370.— King, C. U. S. Geol. Explor. 40th parallel, Clar- 

 ence King, Geologist In charge, 1S7S, vol. 1, p. 608. — Hay, O. P. Bull. 

 179, U. S. Geol. Survey, 1901, p. 475. 



Saniva ensidens (Leidy), Marsh, O. C. American Jour. Sci., ser. 3, 1871, 

 p. 4.57.— Cope, E. D. U. S. Geol. Survey Terr, for 1872, 6th Ann. Rept., 

 F. V. Hayden, U. S. Geologist, Washington, D. C, 1873, p. 632.— Leidy, J. 

 Report of U. S. Geol. Survey of Terr., F. V. Hayden, U. S. Geologist in 

 charge, vol. 1, 1873, pp. 181-344, pi. 15, fig. 15; pi. 17, fig. 35.— Nopcsa, 

 F. B. Beitr. Z. Kenntn, foss. Eid., Beitr. Z. Pal. U. Geol. Ost. Ung., vol. 

 21. Wien, U. Leipzig, 1908, p. 46.— Ffi.iIi:RVARY, G. J. Ann. Miisei Nntion- 

 alis Hungarici, vol. 16, 1918, p. 420. 



Typfi. specimen.— Cat. No. 2185, U.S.N.M. Collected by Dr. F. 

 V. Hayden, 1870. 



The following list shows the bones preserved of the type specimen : 



Skull. — Basioccipital ; basisphenoid ; supraoccipital ; exoccipital, right and 

 left; opisthotic, right and left; prootic, left; postfrontal, right and left; post- 

 orbital, right and left; prefrontal, left; maxilla, right and left; lachrymal, 

 left; jugal, left(?); quadrate, left; epipterygoid, right fragment and left; 

 pterygoid, right and left; ectopterygoid, right and left; palatine, right and 

 left ; vomer, riglit and left ; several teeth. 



Lower jaw. — Dentary, right and left; splenial, left in part; articular + pre- 

 articular, right and left ; angular, right and left ; surangular, right and left ; 

 coronoid, right. 



yer/e6r«e.— Atlas, axis, third, fourth, fifth, sixth, and seventh cervical 

 vertebrae, articulated ; eighth, ninth, tenth, and eleventh vertebrae, articulated ; 

 tvi^elfth to twonty-fir.st vertebrae, partially articulated ; 13 caudal vertebrae. 



Ribs. — Thoracic ribs (8 fairly perfect, parts of 10 others). 



Limb bones. — Right humerus; feunir, distal portion, left; tibia, distal portion, 

 left. 



Pectoral girdle. — Right coracoid. 



Type locality. — Vicinity of Granger, Sweetwater County, Wy- 

 oming. 



Horizon. — Bridger formation. Middle Eocene. 

 The original description by Leidy is as follows : 



Saniiva ensidens. — Among the fossils obtained in Professor Hayden's expedi- 

 tion are the remains of a lacertian, labeled as having been discovered near 

 " Granger." The bones consist of those of most parts of the skeleton, but are 



