14 
Haly sites robustus n. sp. 
Plate I, figures 8, 9, 10 
This species is a robust form growing in massive colonies. Meshes 
of the reticulations of corallites mostly Targe, many long and narrow. 
No tubuli present. Corallites narrowly oval, walls thickened and slightly 
flattened at the ends, giving the outside of the corallite an oblong outline 
rather than the more oval outline of the interior. Spines not well preserved, 
although their presence is indicated in some corallites. A longitudinal 
section shows strong, complete tabulae about 1 mm. apart. 
H. robustus is closely allied to H. gracilis, but differs from it in having 
less quadrangular corallites, thicker walls, and heavier tabulae. Viewed 
in the cross-section H. robustus looks more slender on account of the 
narrower, more oval corallites, viewed in the longitudinal section it looks 
smaller but coarser and heavier because of the less numerous but thickened 
tabulae and consequent smaller and more quadrangular spaces. 
Horizon and Locality. Richmond: Beaverfoot. From the 'Halysites’ 
beds and 250 feet below them, Palliser pass; from Fairmont Springs, 
Windermere district; at 50 feet and 268 feet above the base of the Beaver- 
foot in the Stanford range near the head of Windermere creek, Rocky 
mountains, British Columbia. 
There is a Haly sites from the S tod dart Creek section of Windermere 
district that seems a variation of H. robustus. It has the robust form, 
but the majority of corallites are oval rather than oblong and the longi- 
tudinal section shows more numerous tabulae than the Palliser and Fair- 
mont Springs form. 
Haly sites delicatulus n. sp. 
Plate II, figures 3, 4, 5 
A delicately formed Halysites with mesh of the reticulations much 
finer than in the preceding species. Corallites small, averaging about 
3 in 5 mm., almost oblong, slightly narrower at the ends than in the centre, 
length of corallite about one and a half times the greatest width. Where 
crowded, the shape becomes more rectangular, and at times almost circular. 
A cross-section shows the two contiguous ends of the walls flattlened against 
one another. A longitudinal section shows complete tabulae, six to seven 
in the space of 3 mm., mostly straight, some bent a little at the contact 
with the wall. 
It differs from the widely distributed H. catenulatus in the absence 
of intercorallite tubules. It can readily be distinguished from H. robustus 
and H. gracilis by its finer reticulations and much more delicate form. 
H. gracilis has coarser, much more rectangular corallites. In H. robustus 
the corallite tends to be oblong, but it is much heavier and a longitudinal 
section shows the transverse tabulae of H. delicatulus to be finer and about 
twice as numerous. 
