COPE ON GEOLOGY AND VERTEBRATE FOSSILS, 583 



^. ^ ^ ., . ( lougitudiual 0.130 



Diameter of tibia w ,\ ^^r^ 



( transverse C. 14U 



Diameter of fibula, longitudiual • 0. 135 



Length of tarsus - , 0. 160 



Length of first phalange 0. 031 



Width of first phalange 0.040 



Length of second phalange 0. 070 



Length of third phalange 0. 065 



Length of fourth phalange 0. 059 



Width of fourth phalange at extremity. 0.030 



Width of fourth phalange at middle 0. 018 



From tlie above measurements, it appears that the skeleton of this 

 animal as preserved measures 9 meters 805 centimeters, or 32 feet 5^ 

 inches. Perhaps 5 feet should be added for missing vertebra3 and 

 cranium, giving as a total 37 feet. The specimen is of interest as 

 exhibiting, for the first time, the structure of the limbs. Their ijropor- 

 tions conform closely to those of the restoration of the JEJ. platyurus, 

 vrhich I published in 1869 in the Estinct Batrachia and Reptilia of 

 Xorth America. 



This fossil was discovered in the blue shale of Cretaceous No. 3, in a 

 bluff in Nebraska, on the southwest side of the Missouri, between Sioux 

 City, Iowa, and Yankton, Dakota. 



CLIDASTES Cope. 

 Report U. S. Geol. Surv. Terrs., (4to), ii, p. 130. 



Clidastes tortor Cope. 



Loc. cit., p. 131. 



A nearly complete specimen of this Saurian was found by Mr. Stern- 

 berg iu Western Kansas, which confirms the characters already ascribed 

 to this species, excepting as to the number of the palatine teeth. These 

 should be counted as eighteen in number ; although it is probable that 

 not more than eleven, the number I originally gave, are in functional 

 use at any one time. The centra of the cervical vertebrae, like those 

 of the typical specimen, present round articular faces. 



This specimen, like the one first obtained, was in a coiled position 

 when found. 



Clidastes dispar Marsh. 



Ech'KtoHnnrus dispar Marsh, Amer. Journ. Sci. Arts, 187-, p. — . 



Clidastes cineriarum Cope. 



Rep. U. S. Geol. Surv. Terrs., (4to), ii, p. 137. 



This species is characterized by the length and slender proportions of 

 the diapophyses of the posterior lumbar vertebra\ In one specimen, 

 fifty-eight caudal vertebrie are preserved, of which twenty-eight possess 



