99 
is broad-stemmed, and has three lobules, the median of which extends 
a little below the lateral ones and is slightly asymmetric. The auxiliary 
lobes slant somewhat, but the inner edge of the suture-line is not retracted. 
The inner whorls resemble the more primitive species of Dorsetensia 
S. Buckman and are like D. edouardiana var. S S. Buckman, 1 but have a 
rounded venter and obsolescent ventral furrows like D. edouardiana var. y 
S. Buckman. 2 The outer whorl is oxyconic as in the “liostraca group” of 
Dorsetensia , 3 but is ribbed, not smooth, and is not so involute. The 
suture-line, also, is more developed. 
Horizon and Locality. From the talus of the middle sedimentary 
division of the Hazelton group, exposed in a cliff about 1 mile southeast 
of Silver lake, Hudson Bay mountain, B.C. 
Type: Victoria Memorial Museum; holotype, Cat. No. 7710. 
Guhsania ramata n. sp. 
{ramus, a branch) 
Plate XXII, figures 6, 7 
Diameter 115 mm. 
Height of whorl 38 • 8 % 
Thickness whorl 14-8% 
Width, umbilicus 
The above measurements are approximate. Only the core of about 
one-quarter of one whorl and a fragment of an inner whorl are preserved. 
The outer whorl is partly septate and partly living chamber. This whorl 
is compressed, the height being about 2-6 times the thickness. The whorl 
section is sagittate and the venter fastigate (oxygastric) . A smooth, 
narrow partition band on the core. A small part of preserved test shows 
a hollow keel about 2 mm. high. The core shows slightly curved undula- 
tions on the sides which die out ventrally. The fragment of inner whorl 
has a compressed ovate section, a rounded venter, and, marked on the 
external mould, a 1 * 8 mm. keel. The suture-line is deeply cut, the saddles 
are deep, and have slender, twig-like branches. The first lateral lobe 
is broad-stemmed and has a long, median lobule. The inner margin 
of the suture-line is strongly retracted. This species differs from Guhsania 
bella n. sp. in the more compressed whorl and the more deeply cut suture- 
line with its twig-like branches, its longer median lobule on the first lateral 
lobe, and its retracted inner margin. 
The suture-line shows some resemblance to that of the Hammer- 
toceratidae, but owing to the marked resemblance in whorl-shape and 
ribbing to Guhsania bella n. sp., this species is for the present placed in the 
same genus. 
Horizon and Locality. From the talus of the middle sedimentary 
division of the Hazelton group, exposed in a cliff, about 1 mile southeast 
of Silver lake, Hudson Bay mountain, B.C. 
Type: Victoria Memorial Museum; holotype, Cat. No. 7711. 
i Mon. Infer. Ool. Ammon., Pal. Sac., PL 52, figs. 21, 22 (1892). 
1 Mon. Infer. Ool. Ammon., Pal. Soc., PI. 52, figs. 18, 19 (1892). 
* Mon. Infer. Ool. Ammon., Pal. Soc., p. 308 (1892). 
