1906] New SpEcigs OF TESTUDO AND BAENA. 193 
Red Deer river specimens appeared ~— Previously the species was 
known from afew fragmeats of costal and sternal bones only ; the 
Canadian material has given us an almost complete knowledge of 
the structure of both the carapace and plastron. 
A nearly perfect carapace of a species of Trionyx, and numer- 
ous large fragments of the shell of the same spieces, were obtained 
by the writer from the Belly River beds of Red Deer river near the’ 
mouth of Berry creek. These specimens were identified by him 
in 1902+ with Zrionvx vagans, Cope, and full descriptions with 
figures were given of the carapace. The figures, in the Contri- 
butions to Canadian Paleontology, showing the details of sculp- 
ture are from photographs and may be considered as good 
examples of reproduction by the heliotype process. Mr. Hatcher 
in his report on the Vertebrate Fauna of the Judith River beds, 
Ig05, expresses doubt as to the correctness of the identification of 
the Red Deer river specimens with Z. vagans, Cope, of the 
Laramie. The distinctness of the Laramie and Belly River (Judith 
River) faunas as proved by recent work on the fossil remains of 
the Belly River series is in favour of the Belly River species being 
distinct from 7. vagans. If however the Belly River Trionyx in 
question is to be proved to be specifically distinct from Z. vagans 
structural differences other than those of the surface sculpture as 
shewn in Cope’s type will have to be relied on. The following 
sentences appear in Mr. Hatcher’s report: ‘‘ By reference to his 
(the present writer’s) figures, however, it will be apparent to all 
that the specimens described by Lambe pertain to a species dis- 
tinct from Z. vagans.” ‘* According to Lambe’s figures the 
ridges on the surface sculpturing, instead of being ‘thin and 
much narrower than the intervening pits,’ as described by Cope, 
are heavy and broader than the intervening pits.’’ This the 
present writer cannot agree with nor can he depart from his 
original statement that the ridges of the surface ornamentation 
are narrower than the pits as seen in the specimens themselves 
and as shewn in the photographic figures accompanying his 
descriptions. In 1902, through the courtesy of Professor H. F. 
+ Geol. Survey of Canada, Summary Report for 1901, p. Sr, pls. I and Ls 
1902, also Contr. to Canadian Palzeont., vol. III (quarto), pt. II, 1902. 
+ Ibid. 
