. Contributions to Canadian palæontology. Paleontology. Handlirsch] CANADIAN FOSSIL ISTSECTS 115 neuration of the wings. The latter are 8-5""" long, broadly rounded at the apex, and somewhat narrower in the basal than in the apical portion. The breadth is to the length as 1: 2-6. In the apical haK of the wing, the anterior margin curves strongly downward. The radiua runs out nearly straight, and extends scarcely seven-tenths the length of the wing. The sector arises immediately above the first third of the length of the wing, and at about half its own length divides into two bra
. Contributions to Canadian palæontology. Paleontology. Handlirsch] CANADIAN FOSSIL ISTSECTS 115 neuration of the wings. The latter are 8-5""" long, broadly rounded at the apex, and somewhat narrower in the basal than in the apical portion. The breadth is to the length as 1: 2-6. In the apical haK of the wing, the anterior margin curves strongly downward. The radiua runs out nearly straight, and extends scarcely seven-tenths the length of the wing. The sector arises immediately above the first third of the length of the wing, and at about half its own length divides into two branches, the anterior of which bends upward in a nearly sigmoid curve, while the posterior is broadly arcuate, so that both branches are strongjy divergent, and take quite different direc- Fig. 21.—Penthetria avunculus, Handlirsch. Penthetria avus, sp. nov. Fig. 22. Locality: Tulameen river, opposite Vermilion cliff—(August 6, 1906. ). This wing is 10™" long, the breadth to the length being about as 1:2-6. The anterior margin is strongly curved, the apex not broadly rounded. Toward the end the radius is slightly bent, and reaches seven-tenths the length of the wing; its sector issues just below the first quarter of the length of the wing, is distinctly sigmoid, and forks quite a distance above half its own length. Its rather long anterior branch is not widely divergent, and follows a course similar to that of the posterior branch, fusing about midway between the radius and fhe posterior branch of the sector. The radiomedial cross-vein is about twice as far removed from the origin as from the furcation of the sector, and lies somewhat above half the length of the 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 Geological Survey of Canada. Ottawa, Printed by S. E. Dawson
Size: 1018px × 2455px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea
