. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 1093.—PlaugtlchDus erratlouB. narrow clavus; no embolium or cun- eus; mediastinal and scapular veins widely separated at base. Type P. oc- cidentalis. occidentalis, Scudder, 1884, Proc. Bost. ^ Soc. Nat. Hist., vol. 22, p. 58, and Mem. Fio. antiauu. Bost. Soc. Nat. Hist., vol. 3, p. 348, ( ,,„] Meas. PLANOTicHNrs, u. gen. [Ety. Phviiu,.*^ wandering; tcftnos, track.] A 7.\^m\i, half-cylindr
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 1093.—PlaugtlchDus erratlouB. narrow clavus; no embolium or cun- eus; mediastinal and scapular veins widely separated at base. Type P. oc- cidentalis. occidentalis, Scudder, 1884, Proc. Bost. ^ Soc. Nat. Hist., vol. 22, p. 58, and Mem. Fio. antiauu. Bost. Soc. Nat. Hist., vol. 3, p. 348, ( ,,„] Meas. PLANOTicHNrs, u. gen. [Ety. Phviiu,.*^ wandering; tcftnos, track.] A 7.\^m\i, half-cylindrical, broken trail, runr,in); in any and every direction ; sometinns dotted or sunk deeper at the ainrlcs than at other places, or most deprt ^scd between the angles in some cuscm. Supposed to have been made by »lie larva o. pupa of some Palseodictyo|.tcr- ous insect. See remarks under'Ha|>lo- tichnus. Type P. erraticus. erraticus, n. sp. A simple, irregnliirly zigzag, half-cylindrical, broken tiail, running in any and every directinn, depressed in spots deeper than t'le general trail. Collected in the u]>|)er part of the KaskasLia Group at tlie Whetstone quarries, in Orange Couiitv, Indiana. Platepiiemera, Scudder, 1867, Can. Xat. and Geol., 2d ser., vol. 3, p. 202. [Ety. platys, flat; ephemera, an insect.] Fou n d e d upon Ihe f ragm e n t of an up- per wing, showing nervation and a heavy cross vein near the base between tv.'0 mid- dle veins, from which new promi- nent veins arise; ancient May-flieB. in which the lower externo-median stem seems to be formed on the same plan as the upper stem. Type P. antiqua. antiqua, Scudder, 1867, Can. Nat. and Geol., 2d ser., vol. 3, p. 202, and Acad. Geol., p. 524, Devonian. PoLYKRNDs, Scudder, 1884, Mem. Bost. Soc. Nat. Hist., vol. 3, p. 343. [Ety. polyt, many; emos, a scion.] Body moder- ately stout; wingt rather broad ; me- diastinal vein extending nearly to the tip of wing; branches of scapular vein inequidistant at orig
Size: 1905px × 1311px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
