298 



MOLLUSCOIDA. 



[CLO.- 



carinata, Hall, syn. for Coscinotrypa cri- 

 briform is. 



elintonensis, Hall & Whitfield, 1875, 

 Ohio Pal., vol. 2, p. 113, Niagara Gr. 



flabellata, Hall, 1851, Foster & Whitney's 

 Bep., vol. 2, p. 207, Trenton Gr. 



frondosa, Hall, 1852, Pal. N. Y., vol. 2, p. 

 160, Niagara Gr. 



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

 Univ. St. Mo., p. 54, Niagara Gr. 



intermedia, Nicholson & Hinde, 1874, 

 Can. Jour., p. 156, Niagara Gr. 



intertexta, Nicholson, 1874, Geo. Mag. 

 Lond. n. s., vol. 1, p. 125, Cornifer- 

 ous Gr. 



striatura, see Coscinium striaturum. 

 CLONOPOBA, Hall, 1881, Bryzoans of the Up. 

 Held. Gr., p. 20. [Ety. klonos, con- 

 fusion ; poros, pore.] Consisting of an 

 aggregation of elongate, cylindrical, 

 tubular cells, which at intervals become 

 free and turn abruptly outward in an 

 umbelliform expansion, or in alterna- 

 tion; cell apertures expanded or nar- 

 rowly trumpet-shaped. Type C. semi- 

 reducta. 



fasciculata, Hall, 1887, Pal. N. Y. vol. 6, 

 p. 289, Up. Held. Gr. 



incurva,;Hall, 1881 , Bryozoans of Up. Held. 

 Gr., p. 20, Up. Held. Gr. 



semireducta, Hall, 1881, Bryozoans of Up. 



Held. Gr., p. 20, Up. Held. Gr. 

 C<ELOCAULIS, Hall, 1887, Pal. N. Y., vol. 6, 

 p. 23. [Ety. few/os, hollow; kanlos, 

 stem.] Ramose, structure like Callopora, 

 but growing as Jiollow stems, the thin 

 expansion lined with a striated epitheca. 

 Type C. venusta. 



aculeolata, Hall, 1881, (Callopora aculeo- 

 lata,) Bryozoans of Up. Held. Gr., 

 p. 7, and Pal. N. Y., vol. 6, p. 76, Up. 

 Held. Gr. 



hyale, Hall, 1874, (Callopora hyale,) 26th 

 Rep. N. Y. St. Mus. Nat. Hist., p. 100, 

 and Pal. N. Y., vol. 6, p. 76, Up. 

 Held. Gr. 



irregularis, Hall, 1881, (Callopora irregu- 

 laris,) Bryozoans of the Up. Held. Gr., 

 p. 7, and Pal. N. Y., vol. 6, p. 76, Up. 

 Held. Gr. 



mediopora, Hall, 1887, Pal. N. Y., vol.6, p. 

 23, Low. Held. Gr. 



venusta, Hall, 1874, (Callopora venusta,) 

 2Hth Rep. N. Y. Mus. Nat. Hist., p. 101, 

 and Pal. N. Y., vol. 6, p. 23, Low. 

 Held Gr. 



COSLOCONUS, Ulrich, Geo. Sur. 111., vol. 8, p. 

 402. [Ety. koilos, hollow ; konos, cone.] 

 Zoaria simple, hollow, expanding grad- 

 ually from the striated and sub-acute 

 basal extremity, substance thin ; exter- 

 nal characters of zo<jecia as in Rhom- 

 bopora; primitive portion short; 

 hemisepta well developed. Type C. 

 rhombicus. 



granosus, Ulrich, (in press,) Geo. Sur. 111., 

 vol. 8, pi. 72, Kaskaskia (ir. 



rhombicus, Ulrich, (in press,) Geo. Sur. 

 111., vol. 8, pi. 72, St. Louis Gr. 



COSCINELLA, Hall, 1887, Pal. N. Y., vol. 6, p. 

 19. [Ety. diminutive of Coscinium.] 

 Distinguished from Coscinium by the 

 presence of minute, angular pits be- 

 tween the cell apertures and around the 

 margins of the fenestrules. Type C. 

 elegantula. 



cosciniformis, Nicholson, 1875, (Ptilo- 

 dictya coseiniformis,) Geo. Mag., vol. 2, 



&35, and Pal. Prov. Ont., p. 80, 

 am. Gr. 



elegantula, Hall, 1887, Pal. N. Y., vol. 7, 



p. 239, Ham. Gr. 



COSCINIUM, Keyserling, 1846, Geognost. beo- 

 bacht., p. "192. [Ety. koskinion, a little 

 sieve.] Lobed, leaf-like expansions, cells 

 on each side, quincuncially arranged ; 

 perforated as in Adeona "cribriformiu ; 

 intercellular spaces wide, and permeated 

 with capillary tubuli, which fill up with 

 age; the dividing plate has a cancel- 

 lous structure on either side, Iroin the 

 outer cellules of which the large oblique 

 cells, terminating on the free surlace, 

 take their rise. Type C. cyclops. 



asterium, Prout, 1860, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 574, Keokuk Gr. 



cribriform^, see Coscinotrypa cribriformis. 



cyclops, Keyserling, 1846, Geognost. beo- 

 bacht, p. 192, Up. Held. Gr. 



elegans, Prout, 1860, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 572, St. Louis Gr. 



escharoides, Prout, 1860, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 574, (erroneously 

 written escharense,) Keokuk Gr-. 



keyserlingi, Prout, 1858, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 269, Warsaw Gr. 



latum, Ulrich, (in press,) Geo. Sur. 111., 

 vol. 8, pi. 76, Burlington Gr. 



michelini, Prout, 1860, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 573, St. Louis Gr. 



plumosum, Prout, 1860, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 572, St. Louis Gr. 



saganella, Prout, 1860, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 573, St. Louis Gr. 



striatum, Hall, 1887, Pal. N. Y., vol. 6, p. 

 238, Ham. Gr. 



striaturum, Hall, 1887, Pal. N. Y., vol. 6, 

 p. 88, Up. Held. Gr. 



tuberculatum, Prout, 1860, Trans. St. Louis 

 Acad., vol. 1, p. 573, Keokuk Gr. 



wortheni, Prout, 1860, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 571, Keokuk Gr. 

 COSCINOTRYPA, Hall, 1887, Pal. N. Y., vol. 

 6, p. 19. [Ety. koskinion, a little sieve ; 

 trupa, door.] Explanate, celluliferous 

 on both sides, with fenestrules at vary- 

 ing distances; surface plicated; cells 

 tubular, arising from a mesotheca ; 

 apertures trilobate, denticulated ; inter- 

 cellular tissue vesiculose. Type C. crib- 

 riformis. 



carinata, Hall, syn. for C. cribriformis. 



cribriformis, Prout, 1858, (Coscinium crib- 

 riforme,) Trans. St. Louis Acad. Sci., 

 vol. 1, p. 267, Up. Held. Gr. 

 Orateripora, Ulrich, 1879, Jour. Gin. Soc. 

 Nat. Hist., vol. 2, p. 29, C. erecta, C. 

 , iux\ C. lineata var. exjMnxa, rep- 



