1914] The Ottawa Naturalist. 155 



Maximum length of intraparietal fontanelle 



(oblique) 1 8 



Width of same 1 1! 



Transverse diameter of parietal shaft at midlength 

 Length of lower jaw from back end of articular to 



front end of dentary 1 8| 



Depth of dentary at midlength from inner alveolar 



border to lower margin 



Vertical diameter of orbital opening 41 



Horizontal diameter of orbital opening 



Vertical distance of postfrontal surface between 



orbits above lower end of jugal 1 1 > 



Breadth of crown of tooth of lower jaw 



Length of postfrontal fontanelle 6\ 



Depth of same anteriorly 2\ 



Depth of same posteriori}- 3 



Height of posterior edge of postfrontal above floor 



of supratemporal fossa 3 



Explanation of Plates. 

 Plate XVIII. Lateral view of skull of Gryposaunis notabilis, 



one-sixth the natural size. 

 Plate XIX. Skull of Chasmosaurus belli, from above; one- 

 tenth the natural size. 

 Plate XX. Side view- of same, similarly reduced. 



Abbreviations. .4, parietal fontanelle; AN, angular; 

 AR, articular; B, postfrontal fontanelle; C, supratemporal fossa; 

 D, lateral temporal fossa; DN, dentary; EO, epoccipital; FP, 

 postfrontal; /, jugaL; L, lachrymal; MX, maxilla; N, nasal: 

 NO, nasal opening; OR, orbit; PD, predentary ; PF, prefrontal ; 

 PM, premaxilla; Q, quadrate; QJ, quadrato-jugal ; 5, squa- 

 mosal; SA, surangular; SO, supraorbital. 



Note. The fact that the generic term Protorosauras is ahead}- in 

 use was overlooked by the writer, who now substitutes Chasmosaurus 

 to designate the Belly River ceratopsian from Alberta. The new name 

 has reference to the openings in the skull, more particularly to the 

 great size of the intraparietal fontanelles. 



SALIX HOOKERIANA Barratt. 



This willow, so abundant in low ground and swamps in 

 the Lower Fraser Valley and on Vancouver Island, is, I think, 

 not -understood by the makers of books on the flora of Washing- 

 ton State, or perhaps the plant reaches fuller development in 

 British Columbia. The capsule is very variable in its indument, 

 being either densely tomentose, quite glabrous, or glabrous 

 below or on the sutures and tomentose above, sometimes 



