86 
Calamophyllia suttonensis Clapp and Shimer 
This, the most abundant coral in these beds, as well as at the type 
locality of the Sutton formation, resembles rather closely Thecosmilia 
fenestrata Reuss, 1 the most common species of the Zlambach fauna. This 
species has a diameter of 5 to 10 mm., 28-50 septa in 3 or 4 cycles with 
spines upon the sides of the septa. The abundant and closely related T. 
clathrata Emmr. 2 of the overlying Rhaetic has a diameter of 5 to 8 mm. 
(seldom 9-10), with 50-60 septa, a very thin epitheca, and weak septal 
spines. Our species thus resembles the latter species the more closely in 
size, epitheca, and septal spines, but in number of septa it is nearer T. 
fenestrata. 
Calamophyllia dawsoni ? Clapp and Shimer 
A few fragments of separate corallites apparently similar to C. sutton- 
ensis in all observable characters except size, have a diameter of 3 mm., 
and thus fall within C. dawsoni. This species approaches Thecosmilia 
oppeli Reuss of the Zlambach fauna. 
Montlivaltia cf. gosaviensis Freeh 3 
Our single specimen, little more than a cross-section, apparently 
agrees closely with this species, which is from the Zlambach beds and is 
cylindrical, has a diameter of 25 mm., 122 septa with spines, and thin 
epitheca. 
Terehratula suttonensis Clapp and Shimer 
Plate IX, figure 1 
The two lateral folds of the pedicle valve are anteriorly less pro- 
nounced than on the type specimen, and the corresponding two lateral 
depressions of the brachial valve are less deep. These differences are 
probably due to the crushed condition of the type specimen. 4 
Pleuromya pearsonensis n. sp. 
Plate IX, figure 2 
Shell elongate, sub-elliptical, posterior end somewhat broader than 
the anterior and abruptly rounding. Beak in anterior third of the shell. 
Length about 35 mm., breadth 20 mm. Surface with four to six broad, 
indefinite growth ridges and numerous finer concentric growth lines. 
Named from Pearson creek, western British Columbia, on which the 
fauna was found. 
1 Freeh, F., “Die Korallen der juvavischen Triasprovina,” PaUeontographica, Bd. 37, p. 9, Taf. 1, figs. 26-27; 
Taf. 2, figs. 1-17. 
1 Freeh, F., “Die Korallen de juvavischen Triasprovin*,’ ’ Falteontographica, Bd. 37, p. 16, Taf. 4, figs. 1-11. 
* Freeh, F., “Die korallenfauna der Trias,” Palteontographica, Bd. 37, p. 41, Taf. 11, fig. 7. 
4 Loo. cit., p.432. 
