4 
bipartite, digitate terminal branches, and small digitate and simple lateral 
branches. Third lateral saddle much smaller than either of the others, 
with two unequal, short, digitate terminal divisions, and a few short, 
irregular, smaller lateral branchlets. Dorsal or antisiphonal lobe very- 
small, much longer than wide, with one or two small lateral branches, 
and a trifid extremity. 
As there are only two incomplete specimens, exact measurements can- 
not be obtained, but the larger specimen in hand has a greater diameter 
of 46 mm. and a lesser diameter of 36 mm. From the average taper of 
the cast the original shell must have been over 700 mm. in length when 
complete. 
In cross-section the specimen rather resembles the broad variety of 
B. ovatus figured by Meek^, but it differs from that species in the well- 
marked ridges on the shell and by the much more regular suture with its 
deeper lobes and saddles. Indeed the suture is much more deeply incised 
than any of those figured in the publications available to the author. The 
ornamentation resembles that of B. aquilaensiSy but it differs in the cross- 
section and suture. 
The smaller specimen shows that these sutural characters are distinct 
from near the larval condition. The lip of the living chamber is, appar- 
ently, like that of BacuUtes compressus. 
The specimen does not resemble any previously described BacuUtes 
even closely enough to be referred to it as a variety. Its closest relatives 
appear to be B. ovatus and B, compressus, being as much like one as the 
other. For these reasons the author feels justified in referring it to a 
new species. 
To designate this species the writer proposes the name BacuUtes 
crickmayi, after Dr. Colin H. Crickmay, who first examined the collection. 
Occurrences. (1) Mid-line, between SE. and SW. \ sec. 25, lot 9, 
range 6, W. 4th mer. (2) Coulee, west of road 3| miles south of 
Irvine, Alberta. Collector, W. S. Dyer. 
Genus, Rhaehoceras Meek^ 
Meek described the only known species of this genus as Phylloceras ? 
halU, expressing a strong doubt regarding its position in Suess’ genus 
which was founded on Jurassic forms. Continuing, Meek cites the following 
variations from the generic characters of Phylloceras Suess: 
“Its septa differ in some details, such, for instance, as the proportionally smaller 
size of its first lateral lobe as compared with tne siphonal lobe, and the more nearly bipartite 
termination of the former: also in the less obtusely-rounded terminations of the sub- 
divisions of the lateral sinuses." 
Of a large distorted specimen he says: 
“ I am strongly impressed with the belief that its outer volution naturally made two 
deflexions from the regular curve of those within." ..... “This deflexion, or 
departure, from the regular curve, makes the outer volution much less deeply embracing 
than the inner, and the umbilicus consequently much larger proportionally in the adult, 
than in the young and medium-sized specunens.” 
*U.S. Geol. Surv., Terr., vol. IX, PL 20. 
>Ueek, F. B.: U.S. Geol. Surv., Terr., vol. IX, pp. 468-462 (1876). 
