23 
related to the Canadian forms and may be reckoned as Macrocephalitids. 
However, before such a point could be decided much more information 
than has yet been published would have to be obtained — information 
about Pseudocadoceras and the inner whorls of Cadoceras and Macrocepha- 
litids. This cannot be attempted now — to collect it would extend this 
inquiry unduly. 
This indicates, however, the direction which research connected with 
the Canadian forms should take. If the Alaskan forms of the C, grewingki 
series are Macrocephalitids they would form a genus biologically akin to 
Miccocephalites and chronologically they would be expected to be close: 
that is, the Alaskan deposit, or some part of it, might be nearly synchronous 
with the Canadian Fernie formation. As the Alaskan deposit yields a 
Cadoceras ( C . wosnessenski) it should be about the date of the English 
Kellaways Rock. 
It is for the Canadian geologists to see if their Macrocephalitids actually 
occur together — not merely in the same formation but in the same block 
of that formation — or if they occupy two or more different levels, or if the 
less developed forms — say like Paracephalites jucundus and Miccocepha- 
Utes laminatus occur at a lower level than the more developed P. glabres - 
cens, M. miccus, M. concinnus. Rut, even if they do occur in the same 
block, this is not actually a proof that they were synchronous during life. 
It is not at all unusual for species to occur together in an attenuated deposit, 
yet, where the strata are of good thickness, they are quite widely separated 
by deposits. Further discoveries of the species in other localities will be 
the test in this case: then faunal analysis will come in. At present the 
number of specimens and of localities is far too few for any effective faunal 
analysis, yet it may be interesting to give it. 
— 
P . jucundus 
Meta- 
cephalites 
metastatus 
Mic. 
laminatus 
M . con- 
cinnus 
Af. 
miccus 
p. 
glabres- 
cens 
Loc. 6591 
X 
X 
X 
lion. 6593 
X 
X 
X 
X 
It is now possible to make a few further remarks concerning the date 
of the Canadian Macrocephalitids of the Fernie formation. 
In Europe generally Macrocephalites and its allies, which make up the 
family Macrocephalitidae, occupy a horizon of supposed limited vertical 
range at the beginning of the Callovian or, as some prefer to call it, at the 
end of the Bathian. In Asia, however, Maerocephalitoid forms range, 
according to Waagen who has figured them under the name Stephanoceras, 
from the Putchum Group to the Kuntkote Sandstone inclusive, that is 
from the Bathian to the Argovian (Corallian). And it may be noted that 
forms with ribs curved over the venter have this same range. In South 
America Burckhardt claims an even later date for a “Macrocephalites’ ’ 
(2, PL III, f. 6-11), but it is reasonably certain that this form does not 
belong to the family Macrocephalitidae and that the same result will 
probably be the outcome of strict investigation of Waagen ? s species. 
