18 
VICTORIA MEMORIAL MUBETJM. BULLETIN NO. I 
and shales of Jurassic, Triassie, Permian, Carboniferous, and 
Devonian age. Beneath this again are beds not as yet definitely 
determined as regards age, terminating below in a band of 
yellow sandstone and shale assigned to the middle Cambrian. 
The total thickness of the beds approximates 13,000 feet. The 
accompanying cut illustrates Mr. Dowling’s present views 
regarding the succession of the members of this section, the 
asterisks indicating the two localities at which the fish remains 
occurred. 
Fig. I. — Diagrammatic section through Roche Miette and Bullrush mountain. 
The specimen from Roche Miette is a small, detached, 
anterior tooth referable to the genus Helodus, Agassiz, of the 
selachian family Cochliodontidge. The specimen was embedded 
in bluish grey limestone holding many fragments of crinoid 
stems. 
It is transversely elongated and arched, and appears to be 
somewhat worn (Plate II, figs. 1, 2, and 3.) The crown rises 
gradually to a well-defined rounded central prominence. On 
the side slopes the surface is rounded with a slight indication 
of angulation. On each side of the central prominence, midway 
between it and the lateral ends of the crown, and in the line of 
the angulation, is a faint elevation which might be more pro- 
nounced in an unworn tooth. One half of the crown is narrower 
than the other. The root in this specimen is broken off, but 
enough of its base remains in the concave lower surface to 
indicate that it was antero-posteriorly compressed and that its 
breadth about equalled that of the crown. The upper surface 
of the tooth is smooth and exhibits minute punctse crossing 
the crown obliquely in moderately well-defined rows. There 
are about six punctse in a space of 1 mm. in a row, and the rows 
themselves are a like distance apart. The long diameter of 
the tooth is 12-7 mm., at right angles to which it measures 4 6 
mm. The maximum height of the crown beneath the central 
tubercle is 4 mm. 
