24 
A series of longitudinal tendons are also to be observed extending 
across the transverse processes of the posterior dorsals for a short distance, 
but they have not been sufficiently prepared to show their more intimate 
details. 
Integument 
On the left side of the mid-line of the back above the sacrum for a 
length of nearly 4 feet, a clear and sharp impression of the tuberculated 
skin of this specimen is well preserved. Lambe has described a patch of 
these skin impressions (Plate V), as follows: 
“The epidermal markings found with the Edmonton specimen and 
already briefly described in a paper by the writer (Ottawa Naturalist, 
May, 1913, pp. 21, 22) are natural moulds and casts of non-imbricating 
scales of which some are larger than others. The larger ones are flat or 
slightly convex, polygonal in outline, and average about a quarter of an 
inch in diameter, they are aggregated in irregular oval clusters from 2 to 3 
inches in greater diameter, and about three-quarters of an inch apart. 
Between the clusters are minute, tubercle-like scales averaging about 
one-tenth of an inch in diameter and forming the general ground-work of 
the pattern. 
“This scale pattern is of the same general character as that of Trachodon 
anriectens (Marsh), as described and figured by Osborn in a specimen from 
Upper Cretaceous beds in Converse county, Wyoming, U.S.A., but is 
more pronounced; the oval clusters of plate-like scales are larger, and the 
scales composing them have a greater average diameter. The small-sized 
tubercle-like scales are much the same as in the Wyoming specimen.’' 
The scale pattern in Thespesius annedens is not known in this same 
region of the back at the present time, but the pattern closely resembles 
that from above the ilium and also the pectoral and abdominal region 
as described by Osborn 1 , and such differences as noted by Lambe are just 
those that might be expected on the upper exposed dorsal surfaces. 
1 Mem. Am. Mus. Nat. Hist., vol. L, pt. LL, 1912, p. 48. 
