CH VSMOSAURUS KA1SEN1 



95 



behind the end of the squamosals. Anteriorly, the squamosal is broad, with a pointed epoccipital at 

 the antero-external corner. The jugal notch is deep, with parallel sides. The jugal is long, and 

 slopes backward and outward, with a long pointed epi jugal, thus resembling that of Pentaceratop, 

 as does a number of other details of this very interesting type. 



so j~±^ w I C \ 



w) ^~N~^^ I nar 



lo-xw r j r^~^\ 



A.M.N.H. 5- ^TV^ I V 



V 



Fig. 38.— Right lateral view of skull of Chasmosaurus kaiseni, holotype, 1/12 natural size, e, epoccipitals; ^epijugal; 

 /, prefrontal; h, supraorbital horn; if, preorbital fossa; itf, infratemporal fossa; ;', jugal; /, lacrymal; mx, maxillary; n, 

 nasal; nh, nasal horn; nar, narial opening; o, orbit; f, parietal; tf, parietal fenestra; fmx, premaxiUary; fo, postfrontal; 

 q, quadrate; qj, quadratojugal; r, rostral; sq, squamosal. 



Dimensions 



Greatest length, from tip of rostrum to outer angle of crest 1520 mm. 



Width of crest at posterior end of squamosals 820 



Tip of rostrum to posterior end of nasal horn 463 



Tip of rostrum to anterior edge of orbit 560 



Tip of rostrum to posterior end of jugal 724 



Height of orbit 102 



Width of orbit 62 



Brow horn, from rim of orbit to summit 370 



Height of nasal horn above nares 130 



Chasmosaurus cf. C. kaiseni Brown 



PI. VII, B 



Specimen: No. 40, Univ. Alberta; anterior part of a skull to about one-third the length of the crest, and a few 



bones of the skeleton. 

 Horizon: Belly River formation. 



Locality: Red Deer River, 2 miles southeast and 1 mile east of the mouth of Sand Creek, Alberta. 

 Collector: G. F. Sternberg, 1920. 



Yet another remarkable chasmosaur skull is preserved in the museum of the University of 

 Alberta, Edmonton, and was briefly described by Gilmore, 34 who referred it, with a query, to the 

 genus Eoceratofs Lambe. Gilmore's description stresses the following points: Fully adult; short, 

 deep nasal region, small, upturned nasal horn; subcircular, tapering, slightly recurved brow horns; 

 triangular squamosal having the dimensions of the type of Eoceratops canadensis. These are all fea- 



34 Gilmore, C. W., 1923, pp. 51-52. 



