326 



MOLLUSCOIDA. 



[STR. SYN. 



denticulata, Ulricb, 1888, (in press,) Bull. 

 Denison tlniv., vol. 4, p. 85, Cuyahoga 

 shale. 



distincta, Ulrich, Geo. Sur. 111., vol. 8, pi. 

 71, Kaskaskia Gr. 



hamiltonensis, Nicholson, 1874, (Cerio- 

 pora hamiltonensis,) Geo. Mag., vol. 1, 

 p. 161, Ham. Gr. 



hertzeri, Ulrich, 1888, Bull. Denison 

 Univ., vol. 4, p. 85, Cuyaboga shale. 



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

 vol. 8, pi. 71, Keokuk Gr. 



multiporata, Ulrich, 1888, Bull. Denison 

 Univ., vol. 4, p. 87, Waverly Gr. 



nicklesi, Ulrich, (in press,) Geo. Sur. HI., 

 vol. 8, pi. 71, Kaskaskia Gr. 



obliqua, Ulrich, 1888, Bull. Denison 

 Univ., vol. 4, p. 85, Cuyahoga shale. 



radialis, Ulrich, (in pressi) Geo. Sur. EL, 

 vol. 8, pi. 72, Keokuk Gr. 



regularis, Ulrich, 1888, Bull. Denison 

 Univ., vol. 4, p. 88, Waverly Gr. 



striata, Ulrich, 1888, Bull. Denison Univ., 

 vol. 4, p. 87, Waverly Gr. 



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



HI., vol. 8, pi. 71, Kaskaskia Gr. 

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

 111., vol. 8, p. 383. [Ety. strotos, spread ; 

 poros, pore.] Ramose, branches large, 

 irregular, solid or hollow ; large, ab- 

 ruptly spreading cells, which are sup- 

 posed to represent ooecia, are distrib- 

 uted among the ordinary zocecia ; when 

 well-preserved they appear on the zoarial 

 surface as strongly convex nodes, about 

 0.5 mm. in diameter, with an opening 

 on one side. In all other respects like 

 Fistulipora. Type S. foveolata. 



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

 HI., vol. 8, pi. 77, Keokuk Gr. 



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

 111., vol. 8, pi. 77, Keokuk Gr. 



perminuta, Ulrich, (in press,) Geo. Sur. I 



HI., vol. 8, pi. 47, Up. Held. Gr. 

 SUBRETEPORA, D'Orbigny, 1850, Prodr. d. j 

 Paleont., t. 1, p. 22. [Ety. from Rete- \ 

 pora.~\ Filiform, cylindrical branches, ir- j 

 regularly anastomosing ; cells in a single 

 row on the upper side of the branches 

 (Ulrich says from 2 to 8 rows) ; apertures 

 circular or oval. Type S. reticulata. 



angulata, Hall, 1852, 

 ( Retepora angulata, ) 

 Pal. N. Y., vol. 2, p. j 

 163, Niagara Gr. 

 aspera, Hall, 1847, { 

 (Gorgonia (?) aspera,) I 

 Pal. N. Y., vol. 1, p. I 



asJeratoSta!"' Hall, 

 1852, (Retepora as- 



peratostriata,) Pal. N. Y., vol. 2, p. 161, 



Niagara Gr. 

 clathrata, Miller & Dyer, 1878, (Intricaria 



clathrata,) Cont. to Pal., No. 2, p. 7, 



Hud. Riv. Gr. 

 corticosa, Ulrich, 1886, (Phyllopora corti- 



cosa,) 14th Rep. Geo. Sur. Minn., p. 61, 



Trenton Gr. 



dawsoni, Ulrich, (in press,) (Phylloporina 



dawsoni,) Geo. Sur. 111., vol. 8, pi. 54, 



Trenton Gr. 

 dichotoma, Hall, 1852, (Hornera dicho- 



toma,) Pal. N. Y., vol. 2, p. 163, Ni- 

 agara Gr. 

 fenestrata, Hall, 1850, (Retepora fenes- 



trata,) 3d Rep. N. Y. St. Mus. Nat. 



Hist., p. 178, Trenton Gr. 

 gracilis, Hall, 



1847,(Retopora 



gracilis,) Pal. 



N. Y., vol. 1, p. 



15, Chazy Gr. 

 incepta, Hall, 



1847, (Retepora 



incepta,) Pal. 



N. Y., vol. 1, p. 



15, Chazy Gr. 

 reticulata, Hall, 



1847, (Intrica- 

 ria reticulata,) 



Pal. N. Y. ; vol. 



1, p. 77, Tren- 

 ton Gr. 



tre ntonensis, 

 Nicholson, 

 1875, (Retepora 

 tre ntonensis,) 

 Geo. Mag., vol. 



2, p. 37, Tren- 

 ton Gr. 



variolata, Ulrich, 

 1882, (Phyllo- 

 pora variolata,) 

 Jour. Gin. Soc. FjG 52 4._subretepora re- 

 Nat. Hist., vol. ticnlata. Natural size 

 5, p. 160, Hud. and magnified. 

 Riv. Gr. 



SULCOPORA, D'Orbigny, 1850, Prodr. d. Pa- 

 leont., t. 1, p. 22. [Ety. sulcus, furrow; 

 poros, pore.] Distinguished from Stic- 

 topora by the obtuse extremities of the 

 branches, and by the perpendicular 

 rows of apertures separated by elevated 

 ridges and cross bars. Type S. fenes- 

 trata. 



fenestrata, Hall., 1847, 

 (Stictopora fenes- 

 trata,) Pal. N. Y., 

 vol, 1, p. 16, Chazy 

 Gr. 



SYNOCLADIA, King, 1849. 

 Ann. and Mag. Nat. 

 Hist., 2dser., vol. 3, p. 

 389. [Ety. syn. to- 

 gether ; k'lados', young 

 branch.] Cup-shaped, 

 with a central root-like base ; reticulated, 

 composed of rounded, narrow, often 

 branched interstices, bearingon the inner 

 face from 3 to 5 alternating, longitudinal 

 rows of prominent edged cells, separated 

 by narrow keels, studded with vesicles ; 

 dissepiments thin, spur-shaped, ex- 

 tending upward, and meeting those 

 from the adjoining interstice, and bear- 

 ing two rows of cells. Type S. virgu- 

 lacea. 



FIG. 525. Sulcopora 

 fenestrata. Natu- 

 ral size and mag- 

 nified. 



