FAUNA OF THE TRENTON GROUP. 
7 
Leb&todiscus loriformis Raymond. 
Plate II, figure 9; Plate HI, figure 2. 
Ottawa Naturalist, 1915, 24, p. 66, PL 1, fig. 6. 
This specimen has long been known to the collectors about Ottawa 
as one of the prizes of Dr. Van Cortlandt’s collection (now in the 
Victoria Museum, No. 1414). It has always been considered as an ab- 
normally long-rayed specimen of Agelacrinites dicksoni and there can 
be no doubt that it is very closely related to that species, but since it 
forms one iof the “connecting links” with the species of the later 
formations it seems to deserve a name. It may be described briefly 
as a Lebetodiscus with rays so long that each one nearly touches its 
neighbour, all rays contra-solar, and equally spaced, the outer border 
of small plates narrow, supra-oral structure apparently as in L. dicic- 
soni. This species is believed to be ancestral to the very long-rayed 
forms for which Hall erected the genus Streptaster. 
The holotype, 23 mm. in greatest diameter, is from the Trenton 
at Ottawa, probably from the Cystid beds about 180 feet below the 
top of the formation (No. 1414). 
Genus, Carneyella Foearste. 
Type, Agelacrinites pileus Hall. 
“In Carneyella the five plates occupying the interradial angles 
differ in form from the lateral covering-plates characterizing the rays ; 
this is true especially of the two anterior and of the conspicuous 
posterior supra-oral plates.” 1 
Carneyella hillingsi (Chapman). 
Plate III, figure 3. 
Agelacrmus biUingsi Chapman, Can, Jour., 6, 1860, pp. 358, 204. 
Hemicystites ( Agelacrinites ) biUingsi Sladen, Quart. Jour. Geol. Soc. 
London 35, 1879, p. 750. 
Agelacrinites biUingsi Chapman, Ann. Mag. Nat. Hist, third ser,, 6, 
1860, p. 157, fig.; Billings, Can. Jour., n.s. 6, 1861, p. 516, 
fig. 86; Chapman, ibid, n.s. 8, 1863, p. 199, fig. 180; Expos. 
Min. Gepl. Can., 1864, p. 110, fig. 86, p. 171, fig. 180. 
Hemicystites biUingsi Jaekel, Stamm es, Pelmat., 1, 1899, p. 49. 
Local collectors have for a long time recognized two forms of 
Agelacrinites biUingsi in Ontario, one with straight and one with 
curved rays. 
i Bull. Sc. Lab., Denison Univ., vol. 18, 1917, p. 341. 
