. Additional notes on fossil sponges and other organic remains from the Quebec Group at Little Metis on the lower St. Lawrence [microform]. Sponges; Paleontology; Eponges; Paléontologie. Fig. 8.—Protosponffia mononema. Primary, secondary and tertiarj' spicules, x 5. anchoring-rrd in this species is often mcreased in thickness hy a crust or frosting of pyrite, and this would seem to indicate that it had, like the modei-n Hyalonema, animal matter as well as silica in its composition, or that foreign oi-ganic bodies attached themselves to it. Nearlj' as abundant as the preceding form, which it di
. Additional notes on fossil sponges and other organic remains from the Quebec Group at Little Metis on the lower St. Lawrence [microform]. Sponges; Paleontology; Eponges; Paléontologie. Fig. 8.—Protosponffia mononema. Primary, secondary and tertiarj' spicules, x 5. anchoring-rrd in this species is often mcreased in thickness hy a crust or frosting of pyrite, and this would seem to indicate that it had, like the modei-n Hyalonema, animal matter as well as silica in its composition, or that foreign oi-ganic bodies attached themselves to it. Nearlj' as abundant as the preceding form, which it differs from in the character of the anchoring-vod, each of wiiich ma}' be regarded as a single elongated anchor-shaped spicule, w'ith five i-aj's. The skeleton spicules are also more slender and delicate, and their rays longer, and there is a greater development of protective dermal spines. The osculum is narrow and Avith many long defensive needles. (Plate I., Fig. 3) 3.—Protosponqia polynfma, Dawson. (Figs. 9 and 10.). Fig. ;iapolynema. Portion of base of laige specimen. A large sponge in great 8haj)eless flattened patches, several inches in diameter, though there aie smaller individuals also. Eody spicules fine and slender, making a very open mesh. At base numerous simple root. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dawson, J. W. (John William), Sir, 1820-1899; Hinde, George Jennings, 1839-1918. Ottawa : J. Durie; Toronto : Copp-Clark
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpaleontology, bookyea
