184 



CCELENTERATA. 



[CYS. DEN. 



agara and Up. Held. Grs., p. 57, and 

 35th Rep. N. Y. St. Mus. Nat. Hist., p. 

 461, Up. Held. Gr. 



tenuiradius, Hall, 1882, Foss. Corals Ni- 

 agara and Up. Held. Grs.. p. 56, and 

 35th Rep. N. Y. St. Mus. Nat. Hist,, 

 p. 460, Up. Held. Gr. 



varians, Hall, 1876, Illust. Devon. Foss., 

 pi. 29, Ham. Gr. 



vesiculosum, Goldfuss, 1826, (Cyatho- 

 phyllum vesiculosurn,) Germ. Petref., 

 p. 58, Devonian. 



CYSTOSTYLUS, Whitfield, 1880, Ann. Rep. Geo. 

 Sur. Wis. and Geo. Wis., vol. 4, p. 273. 

 [Ety. kustis, cavity ; stylos, stalk.] Aggre- 

 gate, cylindrical, corallites in contact or 

 united by transverse filaments ; increase 

 by bifurcation , structure cystose as in 

 Cystiphyllum; formed by imperfect 

 transverse plates arranged in circu- 

 lar, funnel-formed order; septa and 

 tabulae obsolete. Type C. typicus. 



infundibulum, Whitfield, 1878, (Syringo- 

 pora infundibulum,) Ann. Rep. Geo. 

 Sur. Wis., p. 79, and Geo. Wis., vol. 4, 

 p. 274, Niagara Gr. 



typicus, Whitfield, 1880, Ann. Rep. Geo. 

 Sur. Wis. and Geo. Wis., vol. 4, p. 274, 

 Niagara Gr. 



DANIA, Edwards & Haime, 1849, Comp. 

 Rend., t. 29, p. 261. [Ety. proper name.] 

 Corallum having most of the charac- 

 ters of Chetetes, but with the tabulae 

 connected through the corallites so as 

 to divide the mass into parallel strata. 

 Type D. huronica. 



huronica, Edwards & Haime, 1849, Comp. 



Rend., t. 29, p. 261, Up. Sil. 

 DAWSONIA, Nicholson, 1873, Ann. Mag. Nat. 

 Hist., 4th ser., vol. 12. [Ety. proper 

 name.] Supposed to be the ovarian 

 vesicles of Graptolites. Type D. cam- 

 panulata. 



acuminata, Nicholson, 1873, Ann. Mag. 

 Nat. Hist., 4th ser., vol. 12, Quebec Gr. 



campanulata, Nicholson, 1873, Ann. Mag. 

 Nat. Hist., vol. 12, Quebec Gr. 



rotunda, Nicholson, 1873, Ann. Mag. Nat. 

 Hist., vol. 12, Quebec Gr. 



tenuistriata, Nicholson, 1873, Ann. Mag. 



Nat. Hist., vol. 12, Quebec Gr. 

 DKKAYELLA, Ulrich, 1882, Jour. Cin. Soc. Nat. 

 Hist., vol. 5, p. 155. [Ety. diminu- 

 tive of Dekayia.] Ramose, interstitial 

 cells ; spiniform tubuli of two kinds, 

 larger ones arranged as in Dekayia, 

 others more numerous; diaphragms in 

 both sets of tubes. Type D. obscura. 



obscura, Ulrich, 1883, Jour. Cin. Soc. Nat. 

 Hist., vol. 6, p. 89, Hud. Riv. Gr. 



robusta, Foord, 1884, Ann. and Mag. Nat. 

 Hist., 5th ser., vol. 14, p. 341, Hud. 

 Riv. Gr. 



DEKAYIA, Edwards & Haime, 1851, Mon. d. 

 Pol. Foss. d. Terr. Pal., p. 277. [Ety. 



Soper name.] Distinguished from 

 onticulipora by having little protuber- 

 ances on the surface between the angles 

 of the corallites. Type D. aspera. 



appressa, Ulrich, 1883, Jour. Cin. Soc. Nat. 

 Hist,, vol. 6, p. 152, Hud. Riv. Gr. 



aspera, Ed- 

 wards & 

 Haime, 

 1851, Pol. 

 Foss. d. 

 Terr. Pal., 



&27 8 , 

 ud. Riv. ,.. ,.;,. . 



& 



Gr. 



Dekayia aspera, nat- 

 ural size, and magnified. 



attnta, syn. 

 for D. as- 

 pera. 



multispi- 

 nosa, Ul- 

 rich, 1883, Jour. Cin. Soc. Nat, Hist., 

 vol. 6, p. 154, Hud. Riv. Gr. 



paupera, Ulrich, 1883, Jour. Cin. Soc. Nat. 

 Hist., vol. 6, p. 153, Hud. Riv. Gr. 



pelliculata, Ulrich, 1883, Jour. Cin. Soc. 

 Nat. Hist., vol. 6, p. 150, Hud. Piv. Gr. 



trentonensis, Ulrich, 1883, Jour. Cin. Soc. 



Nat. Hist., vol. 6, p. 151, Trenton Gr. 

 DENDROGRAPTUS, Hall, 1865, Can. Org. Rem., 

 Decade 2, p. 126. [Ety. dendron, tree , 

 grapho, I write.] Simple or aggregate ; 

 foot-stalk strong, sometimes with a root- 

 like bulb ; ramified above into slightly 

 divergent branches, celluliferous on one 

 side. Type D. hallanus. 



compactus, Walcott, 1879, Utica Slate and 

 related formations, p. 21, Utica Slate. 



dawsoni, Spencer, 1884, Bull. No. 1, Mus. 

 Univ. St. Mo., p. 18, Niagara Gr. 



diffusus, Hall, 1865, Can. Org. Rem., De- 

 cade 2, p. 132, Quebec Gr. 



divergens, Hall, 1865, Can. Org. Rem., 

 Decade 2, p. 129, Quebec Gr. 



dubius, n. ap. Proposed instead of D. 

 simplex, Spencer, in Bull. No. 1, Mus. 

 Univ. St. Mo., p. 17, which was preoc- 

 cupied. Niagara Gr. 



erectus, Hall, 1865, Can. Org. Rem., De- 

 cade 2, p. 130, Quebec Gr. 



flexuosus, Hall, 1865, Can. Org. Rem., 

 Decade 2, p. 127, Quebec Gr. 



frondosus, Spencer, 1884, Bull. No. 1, 

 Mus. Univ. St. Mo., p. 18, Niagara Gr. 

 fruticosus, Hall, 1865, 

 Can. Org. Rem., De- 



gracilis, Hall, 1865, Can. 

 Org. Rem., Decade 2, 

 p. 132, Quebec Gr. 

 gracillimus, Lesquereux, 

 1877, Proc. Am. Phil. 

 Soc. p. 164, (Psilophy- 

 ton gracillimum,) 

 Hud. Riv. Gr. 

 hallanus, Prout, 1851, 

 (Graptolithus h a 1 - 

 lanus,) Am. Jour. Sci. 

 2dser., vol. 11, p. 187, 

 Potsdam sandstone. 

 novellus, Hall, 1879, Desc. New Spec. 

 Foss., p. 2, and llth Rep. Geo. Sur. 

 Ind., p. 225, Niagara Gr. 



FIQ. 166. Dendro- 

 graptus hallanus. 



