12 
MUSEUM BULLETIN No. 31. 
The holotype (No. 7789 Victoria Museum) is from the Crinoid 
beds (Hull formation) at Kirkfield. 
Carneyella raymondi Clark. 
Bull. Mus. Oomp. Zook, vol, 63, No. 1, 1919, p. 11, PI. 1, figs. 
18, 19. 
Mr. Clark has recently described a small Agelacrinitid from the 
middle Trenton near Martinsburg, N.Y., which is comparable to 
Carneyella multibrachiata in that it has more than five arms. In 
this species ray II alone is bifurcated, so that six arms are produced. 
Both have the rays nearly straight, the oral region somewhat larger 
than usual, and both seem to belong to the same group as Carneyella 
youngi . 
Genus, Isorophus Poerste. 
Type, Agelacrinites dncinnatiensis (Roemer). 
“ In Isorophus 1 the supra-oral plates differ only slightly from the 
lateral covering-plates of the rays, and the genus is regarded as more 
primitive in type. To Isorophus are referred Agelacrinus cincin- 
natiensis Roemer, Agelacrinus holbroohi James, and Lebelodiscus 
inconditus Raymond. In all these species accessory covering-plates 
are present along the median line of the rays.” 
Isorophus inconditus (Raymmid). 
Plate IV. 
Ottawa Naturalist, 1915, 24, p. 61, PL 1, fig. 1. 
This is the form, so common in the Oystid beds below Parliament 
hill and at Queens wharf, Ottawa, which has always been identified as 
Agelacrinites tillingsi. It differs in several respects from that species. 
Description. Specimens circular in outline with a broad border 
of small plates. Rays five in number, rather stout, broad at the 
proximal end, and tapering rapidly. They are almost straight in 
small specimens whereas in large ones they are slightly curved, four 
having a contra-solar turn, and the fifth curved a little in the opposite 
direction, so as to embrace the posterior inter-radius. Rays I, II, 
and III of some specimens are contra-solar, and IV and V solar, 
whereas in the one selected as the holotype, IV is almost straight. 
They bear short interlocking lateral covering-plates, about twelve to 
i Bull. Sc; Lab., Denison Univ,, vol. XVIII, 1917, p. 341. 
