326 



MOLLUSCOIDA. 



[STR. — SYN. 



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

 Deni8on Univ., 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, Cuyahoga 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 press,) Geo. Sur. 111., 

 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. 

 111., vol. 8, pi. 71, Kaskaskia (lr. 

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

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

 poro8, pore.] Ramose, branches large, 

 irregular, solid or hollow ; large, ab- 

 ruptly spreading cells, which are sup- 

 posed to represent ocecia, are distrib- 

 uted among the ordinary zocecia ; when 

 well-preserved they appear on thezoarial 

 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. 8ur. 

 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. 

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

 Subretei'ora, D Orbigny, 1850, Prodr. d. 

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

 pora.'} Filiform, cylindrical branches, ir- 

 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 

 163, Niagara Gr. 

 aspera, Hall, 18 4 7 

 (Gorgonia (?) aspera, 

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

 16, Chazy Gr. 

 asperatostriata, 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. 

 Hud. Riv. Gr. 



corticosa, Ulrich, 1886, (Phyllopora corti 

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

 Trenton Gr. 



Fig. 523.— Subrete- 

 pora angulata. 



dawsoni, Ulrich, (in press,) (Phylloporina 

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

 Trenton Gr. 



dichotoma, Hall, 1852, (Hornera dicho- 

 tomy) 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 < i r. 



reticulata, Hall, 

 1847, (Intrica- 

 ria reticulata,) 

 Pal. N. Y. ; vol. 



1, p. 77, Tren- 

 ton (ir. 



tre n t o n e n s i s , 

 Nicholson, 

 1875, (Retepora 

 t rentonensis,) 

 Geo. Mag., vol. 



2, p. 37, Tren- 

 ton Gr. 



variolata, Ulrich, 

 1882, (Phyllo- 

 pora variolata,) 



Jt^'J??" 8o< T Fig- 524.-Subretepor.i re- 

 Nat. Hist., vol. ticuliita. Natural size 

 5, p. 160, Hud. and magnified. 

 Riv. Gr. 

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

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

 poros, pore.] Distinguished from Stio- 

 topora by tlic 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, 

 (Sti c topora feiws- 

 trata,) Pal. N. Y., 

 vol, 1, p. 16, Chazy 

 Gr. 

 Synocladia, King, 1849, 

 Ann. and Mag. Nat. 

 Hist., 2d ser., vol. 3, p. 

 389. [Ety. syn. to- 

 gether ; klados, 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. 



Fio. 525.— Sulcopora 

 fenestrata. Natu- 

 ral size and mag- 

 nified. 



