. Contributions to Canadian palæontology. Paleontology. Handlirsch] CANABIAN POSSIL IXSECTS 105 curve. The sector arises at one-fourth the length of the wing, and in half its own length bifurcates almost exactly below the termina- tion of the radius; the.'anterior branch is arcuate, and fuses in the anterior margin equidistant from the radius and the posterior branch. The radiomedial cross-vein stands midway between the origin and bifurcation of the sector. The media forks almost exactly in the centre of the wing. The cubitus furcates just below the first fourth of the length of the wing; its
. Contributions to Canadian palæontology. Paleontology. Handlirsch] CANABIAN POSSIL IXSECTS 105 curve. The sector arises at one-fourth the length of the wing, and in half its own length bifurcates almost exactly below the termina- tion of the radius; the.'anterior branch is arcuate, and fuses in the anterior margin equidistant from the radius and the posterior branch. The radiomedial cross-vein stands midway between the origin and bifurcation of the sector. The media forks almost exactly in the centre of the wing. The cubitus furcates just below the first fourth of the length of the wing; its posterior branch reaching nearly to the centre, and its anterior member extending two-thirds the length of the wing. The radiomedial cross-vein is situated only a little nearer to the fork of the media than to the mediocubital cross- vein. Penthetria puUa, sp. nov. Fig. Y. Locality: Tulameen river, opposite Vermilion cliff—(August 6, 1906. ).. Fig. 7.—Penthetria pulla, Handlirsoli. Both wings are well preserved, 8°"° long—three times as long as broad—and with a distinctly curved anterior margin. The radius extends seven-tenths the length of the wing, its sector arising at about one-third of the wing's length, and forking just above half its own length directly anterior to the termination of the radius; its anterior branch is slightly arcuate, and fuses immediately below the first third of the distance, between the radius and the posterior branch. The radiomedial cross-vein is situated distinctly nearer to the furcation than to the origin of the sector. The media dichoto- mizes just below (distally) the middle of the wing, its branches being very much extended and strongly divergent. The cubitus forks at about the first fourth of the length of the wing, its posterior gently curved branch reaching nearly half the length of the wing, and its anterior branch extending about three-fourths the length. The. Please note that these images are extracted from scanned
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea
