220 ROYAL SOCIETY OF CANADA 
the writer that they are not referable to B. perrugosus nor indeed to the 
genus of which B. harlani (Meyer) is the type. The generic characters 
of Bottosaurus are not fully known but in the type, from the Cretaceous 
of New Jersey, the splenial reaches to the symphysis without entering 
it. 
The following is an enumeration of the principal specimens ob- 
tained from Red Deer river :— 
1. The greater part of a left mandibular ramus (catalogue number 338), 
plate I, figs. 1, la and 1b. 
2. The posterior portion of a cranium (cat. No. 1551), plate II, fig. 3 
and plate III, fig. 9. 
3. The anterior end of a right dentary bone (cat. No. 808), plate I, 
4. Parts of separate dentary bones (cat. Nos. 780, 1141 and 1775a) 
showing the alveoli for the fifth to twelfth, third to ninth, and 
first to ninth teeth respectively. 
5. Parts of three angulars (cat. Nos. 1339, 1498 and 1702). 
6. Jugals (cat. Nos. 250, 781, 1006 and 1627). The last of these is 
shown in plate IV, figs. 11 and 11a. 
7. A separate frontal bone (cat. No. 1404), plate V, figs. 14 and 14a. 
8. Right squamosal, an anterior half (cat. No. 1765) and a posterior 
half (cat. No. 7827), apparently parts of the same specimen. 
9. The anterior end of a right maxilla showing the premaxillo-maxil- 
lary suture (cat. No. 783), plate III, figs. 10 and 10a. 
10. Separate cervical, dorsal, sacral and caudal vertebrae. Of these, 
figures are given of a dorsal and of a sacral vertebra, plate IV, 
figs. 12, 12a and 13: 
11. Numerous separate teeth, plate IT, figs. 4 to 8a. 
12. Numerous separate scutes, dorsal and (?) ventral, plate V, figs. 
15 to 23. 
The following characters are revealed by the above mentioned 
specimens :— 
1. Mandibular symphysis short, contributed to by the splenial to the 
extent of about one-fifth of the total symphysial length. 
2. Alveolar border of mandible undulating. 
3. Teeth of unequal size, conical, slightly curved, almost smooth, with 
an inner area defined by carinæ, the third lower attaining nearly 
to the size of the enlarged fourth; apparently eighteen in each 
ramus. 
4. An external mandibular foramen, as well as a smaller internal one, 
present. 
