22 
divided by a short lobule, the inner branch being the smaller. The SI is 
smaller, but is similarly divided. S2 is smaller than SI and divided by a 
short lobule. There are two minute auxiliary saddles. The position 
of the tubercle is about on the boundary between SI and L2. The genotype 
is Kanastephanus crickmayi McLearn. 
The suture line is very similar to that of Epalxites Mascke, 1 but the 
lappet, and also the tubercle with respect to the suture line, are more 
dorsal in position than in Epalxites. The lateral position of the lappets 
recalls Otoites Mascke 2 of Sonninian age, but L2 is smaller and narrower 
and the position of the tubercle with respect to the suture line is more 
ventral than in Otoites, being about on the border between SI and L2 and 
not on the outer part of S2. In a like manner this genus both resembles, 
and differs from, Otoites in the Jurassic of western Australia 3 ; the suture 
line, moreover, of these Australian species, and of 0. depressus in particular, 
is simpler and has shallower saddles and larger auxiliary saddles than the 
suture line of Kanastephanus. As no diagnosis of Germanites Mascke 4 
has been given and the genotype has been neither figured nor described 
no comparison with it can be made. 
Other differences, of less generic significance than the foregoing, are 
also worthy of note. The umbilicus is larger in all the known species 
of Kanastephanus than in the typical species of Otoites like 0. sauzei 
d’Orbigny 6 , 0. delicatus S. Buckman 6 , and 0. contractus J. de C. Sowerby 7 . 
The Australian Otoites are variable; 0. depressus Whitehouse 8 has an even 
larger umbilicus than any of the species of Kanastephanus, but has much 
more depressed whorls; 0. semiornatus (Crick.) 9 has an umbilicus somewhat 
similar to that of the known species of Kanastephanus, but has much more 
compressed whorls. 
Kanastephanus crickmayi McLearn 
Plate XVI, figures 7, 8 
1927. Kanastephanus crickmayi McLearn, Trans. Roy. Soc., Canada, 
3rd ser., vol. 21, sec. IV, p. 73, PL 1, figs. 5, 6. 
Diameter 
52-0 
30-0 
40-9 
48-2 
19 
50 
47-0 
28-8 
44-1 
49-2 
43-8 
28-6 
46-1 
48-1 
39-3 
28-6 
36-2 
29-0 
Height, whorl 
Thickness, whorl 
Width, umbilicus 
44-6 
42-8 
Primary ribs 
Secondary ribs 
The first measurement is from the anterior and the last is from the 
posterior end of the ultimate whorl. The ultimate whorl is perlatum- 
bilicate, the umbilicus increasing with growth on the ultimate whorl. 
1 Die Stephanoceras-Verwandten in den Coronaten-schichten von Norddeutschland, Gottingen 1907; Buck- 
man, S. 8.: Type Ammonites, III, Pis. 151, 159 (1920). 
2 Die Stephanoceras-Verwandten in den Coronaten-schichten von Norddeutschland, Gottingen 1907; Buck- 
man, S. S.: Type Ammonites, III, PI. 141 (1919), PI. 158 (1920). 
3 O. depressus, Whitehouse, O. sp. and O. semiornatus (Crick.). See Whitehouse, F. W.: Jour. Roy. Soc., Western 
Australia, XI, pp. 0-8 (1924); Crick., G. C.: Geol. Mag., Lon., Dec. 4, I, pp. 391, 433-436 (1894). 
* Die Stephanoceras-Verwandten in den Coronaten-schichten von Norddeutschland, Gottingen, 1907; Buck- 
man, S. S.: Ann. Mag. Nat. Hist., I, 8th ser., p. 147 (1908). 
5 Pal. Frangaise, Ter. Jurass. I, p. 407, PI. 139 (1849). 
8 Type Ammonites, III, PI. 151 (1919). 
7 Type Ammonites, III, PI. 158 (1920). 
8 Jour. Roy. Soc. Western Australia, XI, p. 6, PI. 1, figs. 4, 5, 6, text fig. 4 (1924). 
9 Geol. Mag., London, n, ser., Dec. 4, vol. I, p. 434, PI. 13, figs, la, b (1894). 
