20 



PROCEEDINGS OF THE NATIONAL, MUSEUM. 



VOL. 60. 



rounded rather than a transversel3^ flattened tail. The dissection 

 of a specimen of Varanus griseus from Egypt, a strictly terrestrial 

 form shows that the spinous processes do not increase so rapidly in 

 height from the sacrum backward as in V. salvator. 



Measurements of vertebrae of Saniwa ensidens, No. 2185, U.S.N.M. 



GIRDLE AND LIMB BONES. 



Coracoid. — The scapular arch is represented only by the right cora- 

 coid which lay in the matrix at the proximal end of the humerus of 

 that side and opposite the ninth and tenth 

 vertebrae of the series, as shown in plate 2, 

 figure 2. Only the ventral side has been ex- 

 posed. It is a broadly expanded bone having 

 a single deep notch on the anterior border as 

 contrasted with the two deep notches in the 

 Varanus coracoid. Between the posterior 

 border of this notch and the glenoid border 

 the bone is perforated by a large coracoid fora- 

 men. The pointed posterior projection is more 

 slender than in Varavnus. (Compare figs. 19 and 

 20.) The precoracoidal process has suffered 

 the loss of its articular end, as has the anterior 

 extremity of the coracoid internal to the notch. 

 The presence of a single notch and the long sweeping convex curve 

 of its inner border, this bone resembles the coracoid of Loemanctus 

 longifes., as figured by Parker.^ The bone is much thickened dorso- 

 ventrally at the border of the glenoid cavity. The ventral surface 

 is slightly convex antero-posteriorly as in the Monitor. The cora- 

 coid measures 15 mm. in width from the glenoid border to the inner 

 edge. As preserved it measures 17 mm. antero-posteriorly. The 

 notch at its widest expanse measures 6 mm, across. 



Fig. 19. — Left cok.vcoid 

 OF Saniwa ensidens 

 Leidy. Type^ Cat. No. 

 2185, U.S.N.M. Natu- 

 ral size. Ventral 

 VIEW, gc, coracoid con- 

 tribution to the for- 

 mation of glenoid 

 fossa ; hcs, border that 

 articulates with 



SCAFULA. 



« Reynolds, S. H. The Vertebrate Skeleton, 1897, p. 286, fig. 54. 



