298 



MOLLUSCOIDA. 



[CLO. — CRA. 



carinata, Hall, syn. for Coscinotrypa cri- 

 briformis. 



clintonensis, Hall & Whitfield, 1875, 

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



flabellata, Hall, 1851, Foster & Whitney's 

 Eep., vol. 2, p. 207, Trenton (ir. 



frondoea, 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. 



striatum, see Coscinium striaturum. 

 Clonopora, Hall, 1881, Bryzoans of the Up. 

 Held. Gr., p. 20. [Ety. klono*, 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. 



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

 p. 289, Up. Held. < i r. 



incurva,|Hall, 1881, Bryozoansof Up. Held. 

 <ir., p. 20, Up. Held. (ir. 



semireducta, Hall, 1881, Bryozoansof Up. 

 Held. Gr., p. 20, Up. Held. < .r 

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

 p. 23. [Ety. koilo*, hollow ; kaulos, 

 stem.] Ramose, structure like Callopora, 

 but growing as hollow stems, the thin 

 expansion lined with a striated epithcra. 

 Type C. venusta. 



aculeolata, Hall, 1881, (Callopora aculeo- 

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

 p. 7, and Pal. N. Y., vol. 6, p. 7<>, Up. 

 Held. (Jr. 



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. (ir. 



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,) 

 26th Rep. N. Y. Mus. Nat. Hist., p. 101, 

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

 Held Gr. 

 CffiLOcoNus, 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 zoeecia 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 Gr. 



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

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



Coscinklla, Hall, 1887, Pal. N. Y., vol. ti, 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 cosciniformis,) Geo. Mag., vol. 2, 

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

 Ham. Gr. 



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

 p. 239, Ham. (ir. 

 Coscinium, Keyserling, 1846, Geognost. beo- 

 bacht., p.*192. [Ety. feodbmton, a little 

 sieve.] Lobed, leaf-like expansions, cells 

 on each side, quincuncially arranged ; 

 perforated as in Adeona crihrifoniti*; 

 intercellular spaces wide, and permeated 

 with capillary tuhuli, which till up with 

 age; the dividing plate has a cancel- 

 lous structure on either side, Ik mi the 

 outer cellules of which the large oblique 

 cells, terminating on the free surface, 

 take their rise. Type C. cyclops. 



as! c rim ii. Prout, 1860, Trans. St. L. mis 

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



cribriforme, see Coscinotrypa cribriformis. 



cyclops, Keyserling, 1846, Geognoftt. beo- 

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



elegans, Trout, 1860, Trans. St. Louis 

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



eacharoides, Prout, 1860, Trans. St. Louis 

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

 written escharense,) Keokuk (ir. 



keyserlingi, Prout, 1858, Trans. St. Louis 

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



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

 vol. 8, pi. 76, Burlinjiton Gr. 



michelini, Prout, 1800, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 578, 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 <ir. 



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. Ixniis 

 Acad., vol. 1, p. 673, Keokuk (ir. 



wortheni, Prout, 1860, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 571, Keokuk (ir. 

 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 vesiculosa 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. 

 Crateripora, Ulrich, 1879, Jour. Cin. Soc. 

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

 lineata, and C. lineata var. exjmma, rep- 



