. Fossil sponges and other organic remains from the Quebec Group at Little Metis [microform]. Sponges; Paleontology; Eponges; Paléontologie. [DAWSON] FOSSIL SPONGES AND OTHER ORGANIC REMAINS 117 Many tViiifineiits t»l' this species have l)oen ibund from time to time, bliowiiii;' ionjf stout taporiiii; anchorinjij-rods with masses of long slender simple spicuk's near them ; hut in 18!t5 for the first time nearly perfect specimens were ohscrvcd. They consist of discs somewhat lari^er than tho!J« of S. satirt((. made up of fine straight spicules radiating from a intint near one side and i-ather c
. Fossil sponges and other organic remains from the Quebec Group at Little Metis [microform]. Sponges; Paleontology; Eponges; Paléontologie. [DAWSON] FOSSIL SPONGES AND OTHER ORGANIC REMAINS 117 Many tViiifineiits t»l' this species have l)oen ibund from time to time, bliowiiii;' ionjf stout taporiiii; anchorinjij-rods with masses of long slender simple spicuk's near them ; hut in 18!t5 for the first time nearly perfect specimens were ohscrvcd. They consist of discs somewhat lari^er than tho!J« of S. satirt((. made up of fine straight spicules radiating from a intint near one side and i-ather coai-ser tluin those of S. sancta, and showing here and there a tendency to he aggregated more densely as if in hundles, Itut this is not very marked. At and toward the circumference there are occasionally a few very snndl cruciform spicules which, as they are not confined to one specimen, I regard as prohahly the remains of an outer or cortical layer. If they are accidental tliey must he the smaller spicules of disintegrated Protospongia^ entangled in the spicular surface of Ste- phanella. It seems more likely, however, that they are a i)art of its structure, in which case it furnishes an example of a sponge with a dense internal skeleton of radiating spicules. Fig. 27 represents a nearly iSlk^'. Fi(». 2S.—StephaneUa Hindii. Fragment Fi(i. '29.—StephaneUa ? Anchoring- with anchoring-rods. rods and part of the spicules, enlarged. complete specimen, and Figs. 28 and 29 disintegrated fragments with the anchoring-roots, whi(d\ in some specimens are longer and more tapering than in others, though always very stout at the hase. In Dr. Ami's specimens from Ottawa, a few stout anehoring-rods and cruciform spicules are found in the same dahs with Stei^hanella, hut none of them are seen to he attached. I think it not improhable, how- over, that the former, at least, belong to Please note that these images are extracted from scanned page images that may have been dig
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Keywords: ., bookcentury1800, bookdecade1890, booksub, booksubjectpaleontology
