35 
RELATIONSHIP OF ANCHICERATOPS 
Anchiceratops falls within the Chasmosaurus-Torosaurus group, as 
shown by the large, flat, sub-rectangular crest; long, narrow squamosals, 
extending almost to the back of the elongated parietals; abbreviated face; 
long, slender nose or that portion in front of the nasal horn. The nose 
in front of the nasal horn is unknown in Torosaurus, but when known will 
probably prove to be long and slender. The parietal fontanelles are 
smaller in Anchiceratops than in Torosaurus , as shown in the restorations 
in the monograph on the Ceratopsia 1 . It is possible that these fontanelles 
are shown too large in Torosaurus or there may be variation with the age 
of the animal. In his original description of the genus, Brown placed 
Anchiceratops as intermediate between Monoclonius and Triceratops, 
but it is doubtful with our present information if he would hold to this 
view. In both Centrosaurus ( Monoclonius ) and Triceratops the crest is 
short, round, and strongly arched transversely, and the face is relatively 
long, whereas the nose is short and deep, in all of which they differ from 
Anchiceratops. Likewise, there is very little resemblance between 
Styracosaurus and Anchiceratops except in the great development of the 
epoccipitals on the parietals. 
Dr. Parks regards Arrhinoceratops 2 as belonging to the Chasmosaurus- 
Torosaurus group, but notes that his specimen does not seem to be inter- 
mediate as would be expected, coming, as it does, from a formation which 
is intermediate in age. Anchiceratops would seem to be more nearly in 
the direct line and Arrhinoceratops might be regarded as an offshoot. 
In Anchiceratops and Arrhinoceratops the inferior surface of the crest 
is marked by vascular grooves as in Triceratops, whereas in the Belly 
River forms these grooves extend only a short distance from the edge 
on the under surface. These Edmonton genera also approach the Lance 
genera in the almost complete closing superiorly of the frontal fontanelle 3 
and in the large brow horns rising from the supero-posterior border of the 
orbits. This is only natural, for an examination of the respective faunas 
shows that the Edmonton, though intermediate in age, is closer to the 
Lance than to the Belly River 4 . In the Belly River forms the frontal 
fontanelles are open superiorly and the brow horns rise from almost 
directly above the orbits. 
Anchiceratops longirostris n. sp. 
Type, Cat. No. 8535, Geological Survey, Canada 
Generic Characters. Skull large; brow horns larger than nasal horn; 
crest large, flat, more or less rectangular, and ornamented on the border 
with large epoccipital bones; epoccipitals on parietals larger than those on 
squamosals; a pair of short, knob-like processes on supero-posterior end of 
crest; squamosals long and narrow. 
Specific Characters. Skull long and of light construction; nasal horn 
core small and triangular in cross-section; nose, in front of nasal horn, 
» Marsh. Hatcher, and Lull: U. 8. G. 8., Mon. XLIX, Figs. 118-119. 
* Parks, W. A.: "Arrhinoceratops Brachyops a New Genus and Species of Ceratopsia, from the Edmonton 
Formation of Alberta"; Univ. of Toronto Studies No. 19, 1925. 
* See Sternberg, C. M.: "Homologies of Certain Bone of the Ceratopsian Skull”; Trans. Roy. Soc., Canada, 
3 series, vol. XXI, sec. IV, pp. 135-143, PI. I, F. fo. (1927). 
* See Sternberg, C. M.: "Notes on the Edmonton Formation of Alberta”; Can. Field Nat., vol. XL, pp. 102-104 
(May, 1920). 
