116 



PLANTS. 



[CYC. DEC. 



valida, see Aneimites validus. 



varia, Dawson, 1862, Quar. Jour. Geo. 



Soc., vol. 18, p. 319, Devonian. 

 virginiana, see Pseudopecopteris virgin- 



iana. 

 wilsoni, Wood, 1860, Proc. Acad. Nat. 



Sci.. p. 519, Coal Meas. 

 CYCLOSTIGMA, Haughton, 1860, Ann. and 

 Mag. Nat. Hist., 3d ser., vol. 5, p. 444. 

 [Ety. kuklos, circle; stigma, a dot or 

 puncture.] Stems arborescent, surface 

 tuberculate,rugose lengthwise ; tubercles 

 in regular spiral order, small, subglo- 

 bose, more generally conical, acute, 

 topped with a vascular terminal and 

 prominent point, or more rarely flat- 

 tened at the top into small, round 

 areoles, with the vascular point in the 

 middle ; decorticated surface smooth or 

 obscurely striate lengthwise by the 

 series of tubercles, which are oval, ele- 

 vated or prominent, and gradually ef- 

 faced downward or decurring, preserv- 

 ing the impressions of the central vas- 

 cular scars. Type C. kiltorkense. 

 affine, Dawson, 1881, Quar. Jour. Geo. 



Soc., vol. 37, p. 301, Chemung Gr. 

 densifolium, Dawson, 1871, Foss. Plants 



Can., p. 43, Devonian, 

 kiltorkense, Haughton, 1860, Ann. and 

 Mag. Nat. Hist., 3d ser., vol. 5, p. 

 444, Subcarboniferous. 

 CYMOGLOSSA, Schimper, 1869, Trait< de 

 Paleontologie Vegetale, vol. 1, p. 553. 

 [Ety. kumo, wavy ; glossa, tongue.] 

 Frond pinnate, or bipinnate ; pinnse 

 oblong, sessile, alternate, margin lobed ; 

 nerves simple or branching, reaching 

 the margin and leaving triangular spaces 

 without nerves. Type C. goepper- 

 tana. 



breviloba, Fontaine & White, 1880, Perm, 

 and Up. Carb. Flora, p. 86, Coal Meas. 

 or Permian. 



formosa, Fontaine & White, 1880, Perm, 

 and Up. Carb. Flora, p. 86, Coal Meas. 

 or Permian. 



lobata, Fontaine & White, 1880, Perm, 

 and Up. Carb. Flora, p. 87, Coal Meas. 

 or Permian. 



obtnsifolia, Fontaine & White, 

 1880, Perm, and Up. Carb. 

 Flora, p. 85, Coal Meas. or 

 Permian. 



DACTYLOPHYCUS, Miller & Dyer, 

 1878, Cont. to Pal., No. 2, p. 1. 

 [Ety. dactylos, finger; phukos, 

 sea- plant.] Stem divided at 

 one or both ends into three 

 or more short subequal 

 branches, and closely related 

 to Ichnophycus. Type D. tri- 

 digitatum. 



quadripartitum, Miller & Dyer, 

 1878, Cont. to Pal., No. 2, p. 2, 

 Utica Slate Gr. 



tridigitatum, Miller & Dyer,1878, Cont. 

 to Pal., No. 2, p. 1, Utica Slate Gr. 



phycus 

 tridigi- 



DADOXYLON, Endlicher, 1840, Syn. Con. [Sig. 



pine or torch-wood.] Branching trunks, 



with distinct zones of growth and a 



pith of Sternbergia 



type; wood-cells, with 



rows of areoles with 



oval pores ; medullary 



rays with series of 



cells, 

 acadianum, Dawson, 



1863, Can. Nat., vol.8, 



and Acad. Geol., p. 473, 



Coal Meas. 

 annulatum, Dawson, 



1863, Can. Nat., vol. 8, 



and Acad. Geol. p. 473, 



Coal Meas. 

 antiquum, Dawson, 1863, 



Can. Nat., vol. 8, and 



Acad. Geol. p. 473, 



Coal Meas. FIG. 30.-Dadoxy- 



clarkii, Dawson, 1882, woody' zone or 



Foss. Plants Brian fiber (pleuren- 



and Up. Sil. Forma- c h y m a) ; c, me- 



ti^iia nt 9 194. Ton dulla or pith; d, 



tions, pt. /, p. 1/4, uen- cast of hol iow 



esee shales. pith or sternber- 



halli, Dawson, 1862, gia. 

 Quar. Jour. Geo. Soc., vol. 18, p. 306, 

 Ham. Gr. 



materiarium, Dawson, 1863, Can. Nat., 

 vol. 8, and Acad. Geol., p. 473, Up. Coal 

 Meas. 

 newberryi, Dawson, 1871, Foss. Plants 



Can., p. 14, Portage Gr. 

 ouangondianum, Dawson, 1861, Can. Nat., 

 vol. 6. and Acad. Geol, p. 534, 

 Up. Devonian. 



DAN^ITES, Gceppert, 1836, Syst. 

 Filic. Foss., p. 380. [Ety. 

 from the genus Damea.~\ 

 Fronds pinnate ; secondary 

 veins coming out in right 

 angles from the primary 

 straight nerve, simple or di- 

 chotomous; sporanges, .on 

 the lower side of the lamina, 

 placed in rows from the me- 

 dial nerve to near the bor- 

 ders along the lateral veins, 

 oval or linear exannulate. 

 Type D. asplenioides. 

 asplenioides, var. major, Bun- 

 bury, 1846, Quar. Jour^ Geol. 

 Soc., vol. 2, p. 85. Coal 



emersoni, Lesquereux, 1880, 

 Coal Flora of Pa., p. 157, 

 Coal Meas. 



macrophyllus, Newberry, 1873, 

 (Alethopteris macrophylla,) 

 Ohio Pal., vol. 1, p. 383, 

 Low. Coal Meas. 

 FIG. 31. DECHENIA, Gceppert, 1841, Die 

 Danseites Gattungen der fossilen Pflan- 



zen, p. 43. [Ety. proper 

 name.] Stems arborescent; 

 leaf-scars in continuous spiral lines ; 

 bolsters oblong, rounded, marked by 

 obscure concentrical striae, on the middle 



macrophyl- 



