. Fossil sponges and other organic remains from the Quebec Group at Little Metis [microform]. Sponges; Paleontology; Eponges; Paléontologie. Fig. 8. -Pi'otosponffia mononema. Primary, secondary and tertiary spicules, x n. anchoring-rod in tliis species is often increased in thickness by a crust or frosting of pyrite, and this would seem to indicate that it had, like tlie modern Hyalonema, animal matter as well as silica in its composition, or that foreign organic bodies attached themselves to it. Nearly as abundant as the preceding form, wliich it differs from in the character of the anchoring
. Fossil sponges and other organic remains from the Quebec Group at Little Metis [microform]. Sponges; Paleontology; Eponges; Paléontologie. Fig. 8. -Pi'otosponffia mononema. Primary, secondary and tertiary spicules, x n. anchoring-rod in tliis species is often increased in thickness by a crust or frosting of pyrite, and this would seem to indicate that it had, like tlie modern Hyalonema, animal matter as well as silica in its composition, or that foreign organic bodies attached themselves to it. Nearly as abundant as the preceding form, wliich it differs from in the character of the anchoring-rod. each of which may be regarded as a single elongated anchor-shaped spicule, with five rays. The skeleton Bpicules ai-e also more slender and delicate, and their rays longer, and there is a greater development of protective dermal spines. The osculum is narrow and with many long defensive needles. (Plate I., Fig. 3) 3.—Protosi'ongia polynema, Dawson. (P^igs. !» and 10.). Fig. 9.—Protonponqia polynema. Portion of base of large specimen. A large sponge in great shapeless flattened patches, boveral inches in diameter, though there are smaller individuals also. Body 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; Royal Society of Canada. Montreal : [s. n. ]
Size: 1630px × 1533px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksub, booksubjectpaleontology
