158 



PROTOZOA. 



[CYA. DYS. 



CYATHOPHYCUS, Walcott, 1879, Trans. Alb. 

 Inst., vol. 10, p. 18. [Ety. kuathos, cup ; 

 phukos, sea-weed,] Hollow, cyathiform, 

 with a reticulated structure. Type C. 

 reticulatum. 



reticulatum, Walcott, 1879, Trans. Alb. 

 Inst., vol. 10, p. 18, Utica Slate. 



subsphericum, Walcott, 1879, Trans. Alb. 



Inst, vol. 10, p. 19, Utica Slate. 

 CYATHOSPONGIA, Hall, 1882, Foss. Corals 

 Niagara and Up. Held. Grs., p. 15. [Ety. 

 kuathos, cup; spongia, sponge.] Body 

 solid, turbinate, cyathiform ; structure 

 similar to Astylospongia. Type C. ex- 

 crescens. 



excrescens, Hall, 1882, Foes. Corals Niag- 

 ara and Up. Held. Grs., p. 15, and 35th 

 Rep. N. Y. St. Mus. Nat. Hist,, p. 419, 

 Niagara Gr. 



CYLINDROCOZLIA, Ulrich, 1889, Am. Geo., vol. 

 3, p. 245. [Ety. kulindros, cylinder; 

 koilos, belly.] Cylindrical ; central clo- 

 aca ; walls thick, radiating canals. Type 

 C. endoceroidea. 



covingtonensis, Ulrich, 1889, Am. Geo., 

 vol. 3, p. 247, Hud. Riv. Gr. 



endoceroidea, Ulrich, 1889, Am. Geo., vol. 

 3, p. 246, Trenton Gr. 



minnesotensis, Ulrich, 1889, Am. Geo., 

 vol. 3, p. 248, Trenton Gr. 



minor, Ulricb, 1889, Am. Geo., vol. 3, p. 



248, Trenton Gr. 



Dentalina, D'Orbigny, 1826, Ann. Des. Sci. 

 Nat., t, 7, p. 89. [Ety. dentate, tooth; 

 inm, implying resemblance.] 



priscilla, see Nodosinella priscilla. 

 DICTYOPHYTON, Hall, 1863, 16th Rep. N. Y. 

 -St. Mus., p. 87. [Ety. dictyon, net; 

 phyton, plant.] Turbinate or infundi- 

 buliform, with nodose or conical pro- 

 tuberances or hollow stems externally, 

 and marked by minute rectangular 

 spaces, and consisting of a reticulate 

 envelope. Type D. filitextile. 



abacus, Hall, 1884, 35th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 474, Waverly Gr. 



annulatum. Hall, 1863, 16th Rep. N. Y. 

 St. Mus. Nat. Hist., p. 90, ChemumgGr. 



baculum, Hall, 1884, 35th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 471, Chemung Gr. 



becki, Conrad, 1837, (Lithodictuon becki,) 

 Ann. Rep. N. Y., p. 167, and Pal. N. Y., 

 vol. 2, p. 6, Medina Sandstone. 



catilliforme, see Phragmodictya catilli- 

 formis. 



cinctum, Hall, 1884, 35th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 472, Chemung Gr. 



conradi, Hall, 1863, 16th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 89, Chemung Gr. 



cylindricum, Whitfield, 1881, Bull., No. 

 1, Am. Mus. Nat. Hist., p. 19, KeokukGr. 



fenestratum, Hall, 1863, 16th Rep. N. Y. 

 St. Mus. Nat. Hist., p. 90, Chemung Gr. 



filitextile, Hall, 1863, 16th Rep. N. Y. St. 

 Mus. Nat. Hist, p. 88, Chemung Gr. 



hamiltonense, Hall, 1884, 35th Rep. N. Y. 

 St. Mus. Nat. Hist., p. 468, Ham. Gr. 



irregulare, Hall, 1884, 35th Rep. N. Y. St. 

 Mus. Nat. Hist, p. 470, Chemung Gr. 



newberryi, see Thamnodictya newberryi. 

 nodosum, Hall, 1863, 16th Rep. N. Y. St. 



Mus. Nat Hist, p. 91, Chemung Gr. 

 parallellum, Hall, 1884, 35th Rep. N. Y. 



St. Mus. Nat. Hist., p. 471, Chemung Gr. 

 patulum, Hall, 1884, 35th Rep. N. Y. St. 



Mus. Nat. Hist., p. 469, Chemung Gr. 

 prismaticum, Hall, 1884, 35th Rep. N. Y. 



St. Mus. Nat. Hist., p. 469, Chemuner, Gr. 

 ramosum, Lesquereux, 1884, Coal Flora 



of Pa., p. 827, Up. Chemung Gr. 

 redfieldi, Hall, 1863, 16th Rep. N. Y. St. 



Mus. Nat. Hist, p. 88, Waverly Gr. 

 rude, Hall, 1863, 16th Rep. N. Y. St. Mus. 



Nat. Hist., p. 90, Chemung Gr. 

 sacculus, Hall, 1884, 35th Rep. N. Y. St. 



Mus. Nat, Hist., p. 473, Waverly Gr. 

 telum, Hall, 1884, 35th Rep. N. Y. St. Mus. 



Nat. Hist., p. 470, Chemung Gr. 

 tenue, Hall, 1884, 35th Rep. N. Y. St. Mus. 



Nat. Hist., p. 474, Waverly Gr. 

 tuberosum, Conrad, 1842, (Hydnoceras 



tuberosum,) Jour. Acad. Nat, Sci. Phil., 



vol. 8, p. 267, Chemung Gr. 

 DICTYOSTROMA, Nicholson, 1S75, Ohio Pal., 



vol. 2, p. 254. [Ety. 



dictyon, net; stroma, 



layer.] Allied to 



Stromatopora, but 



the upper surface of 



each lamina is devel- 

 oped into conical 



points, which sup- 

 port the lamina 



above instead of pil- 

 lars. The laminre 



have horizontal 



canals, and are prob- 

 ably minutely per- 

 forate. Type D. 



undulatum. 

 reticulatum, Spencer, . 



1884, Bull. Mus. 



Univ. St. Mo., p. 51, Niagara Gr. 

 undulatum, Nicholson, 1875, Ohio Pal., 



vol. 2, p. 254, Niagara Gr. 



FIG. 102. 

 Dystactospongia iasolens. 



DYSTACTOSPOXGIA, S. A. Miller, 1882, Jour. 

 Gin. Soc. Nat. Hist., vol. 5, p. 42. 

 [Ety. dystaktos, hard to arrange ; spongia, 



