THE OTTAWA NATURALIST. 
ee 
VoL. XIX. OTTAWA, JANUARY, 1906. No. 10 
DESCRIPTIONS OF NEW SPECIES OF TESTUDO AND 
BAENA WITH REMARKS ON SOME CRETACEOUS 
FORMS.* 
By Lawrence M. Lambe, F.G.S., F.R.S.C., Vertebrate Palzontologist to 
the Geological Survey of Canada. 
(With two plates.) 
In the collection of vertebrate remains, made by the writer in 
1904, from the Oligocene deposits of Bone coulée, Cypress hills, 
Assiniboia, are parts of a number of costal plates of a tortoise 
referable to the genus Testudo. The specimens were found 
separately but apparently belong to one species, and, although 
fragmentary, they are of sufficient interest to warrant description, 
-especially as they appear to belong to a hitherto undescribed 
Species. For this species the name exornatfa is proposed. 
The three specimens figured (plate III, figures 3, 1 and 2) 
are the proximal end of the left 1st costal, the distal half of the 
left 5th costal and the proximal end of the left 6th costal. 
All the specimens shew decided groove markings. Selecting 
the distal end of the 5th costal plate (figure 1) as the type of the 
species, it is seen to be particularly narrow and thick but its 
outline indicates that the bone when entire had a considerable 
breadth proximally. Its upper surface presents a number of 
parallel shallow furrows in the direction of the length of the cara- 
pace. It is thickened along its posterior articular border where it 
joined the similarly thickened anterior border of the 6th costal, 
* Communicated by permission of the Acting Director of the Geological 
Survey of Canada. 
