. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. )lplslyluHdawsoiii. ut. Nlze; 6, terminal epinoufl, with two pairs of simple, ovate appendages. Type D. dawsoni. (lawsoni, Salter, 1863, Quar. Jour. Geo. Soc, vol. 19, p. 77, and Acad. Geol., p. 207, Coal Meap. DiPTERocARiH, Clarke, 1883, Am. Jour. Sci. and Arts, 8d ser., vol. 26, p. 121. [Ety. dipteral, two-winged; karia, Carapace elongate, divided along tlie major axis into two wings; greatest wi
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. )lplslyluHdawsoiii. ut. Nlze; 6, terminal epinoufl, with two pairs of simple, ovate appendages. Type D. dawsoni. (lawsoni, Salter, 1863, Quar. Jour. Geo. Soc, vol. 19, p. 77, and Acad. Geol., p. 207, Coal Meap. DiPTERocARiH, Clarke, 1883, Am. Jour. Sci. and Arts, 8d ser., vol. 26, p. 121. [Ety. dipteral, two-winged; karia, Carapace elongate, divided along tlie major axis into two wings; greatest width anteriorly; wings united medi- ally for one-third to one-fifth the length of the carapace; anchylosed, but sep- arated toward the ends. Surface marked concentrically. Type D. pennidaedali. pennidsedali, Clarke, 1883, Am. Jour. Sci. and Arts, 3d ser., vol. 25, p. 122, Che- mung 6r. pescervje, Clarke, 1883, Am. Jour. Sci. and Arts, 3d ser., vol. 25, p. 123, Che- mung (ir. procne, Clarke, 1883, Am. Jour. Sci. and Arts, 3d ser., vol. 25, p. 122, Chemung Gr. Dithykocaris, Scouler, 1844, Syn. Carb. Fobs., Ireland & McCoy, 1855, Brit- ish Pal. Hocks, p. 181. [Ety. dithyros, having two valves; A;ara,shrimp.) Car- apace semioval; an- terior end rounded, sometimes notched; posterior end sub- truncate, with lat- eral angles produced into spines; sur- face with faint imbricating striie, mar- gins thickened and corrugated, with three longitudinal ridges, one in the middle extending the entire length, the others not reaching the margin; tail terminating in three tri- angular spines. Type D. scouleri. belli, see Mesothyra belli, carbouaria, Meek & Worthen, 1870, Proc. Acad. Nat. Sci. Phil., p. 55, and Geo. Sur. 111., vol. 5, p. 6l8,Coal Meas. neptuni, see Mesothyra nep- tuni. Dolichocephala, Claypole, 1883, Proc. Am. Phil. Soc, p. 238, syn. for Stylonurus. lacoana, syn. for Stylonurus excelsior. DoLiCHOMETOPUs, Angelin, 1862, Paleonto- logia Scandinavica. [Ety. dolichos, long;
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
