668 



CCELENTERA TA. 



|I'AI,.— CCE. 



Pal.eacis cavernosa, 8. A. Miller, 1891, Ad- 

 vance Sheets 17th Rep. Geo. Sur. Ind., 

 p. 4, Waverly Gr. 



Pkotospoxgia coronata, P. cyathiformis, P. 

 delicatula, P. mononema, P. polynerua, 

 and P. tetranema, Dawson & Hinde, 

 1889, Trans. Roy. Soc. Can., vol., 7, pp. 

 37 to 43, Up. Taconic. 



PtycJwstylus, Gurley, 1884. The name was 

 preoccupied by Gabb in 1866. 



Rece]'ta(Ti.itks elrodi, 8. A. Miller, IN!)!', 

 Advance Sheets of 18th Rep. Geo. Bar. 

 Ind., p. 3, Up. Held. Gr. 



Rliombodictyon globosus, James. Too poorly 



defined to be recognized. 

 Spirocyathus, Hinde. Synonym for Archa- 



ocyathus. 

 Stephanella xancta, Hinde, 1891, Lond. Geo. 



Mag., vol. 8, p. 22. Radiating lines of 



pyrites supposed to represent spicules. 



No generic or specific characters. 

 Stromatopora ludlowemis and S. tubularti, 



James. Too poorly defined to warrant 



any recognition. 

 Sybingostboma. Type S. densurn. 



•o^o« 



SUBKINGDOM CCELENTERATA. 



The Order Rugosa has been called Tetracoralla, because the septa are said to be 

 some multiple of four; and the Tabulata, Hexacoralla, because the septa are said 

 to be a multiple of six. The internal cavity of a (Jraptolite, so far as I have been 

 able to discover, is divided longitudinally into three or four departments, which is 

 altogether different from the structure of the living Hydrozoa, where the interior 

 part of the body consists of a single undivided cavity. It may be the Order Grap- 

 tolida should be raised to the rank of a Class, because it is so different in composi- 

 tion and structure from the living Hydrozoa. 



Errata. — On page 168, insert "Family Calceolidje. — Calceola," and remove 

 " Baryphyllum " to the "Cyclolitidfc." On page 169, for "Family Helioporidie " 

 read "Family Heliolitida 1 ." On page 177, strike out " Chonophyllum validuni." 

 In the eleventh line from the top of page 189, read " F. alpenensis" for " F. du- 

 mosus." In the sixth line from the bottom of page 194, read "1669" for 

 "1869." In the first line on top of page 196, read "Description" for " Des- 

 crides." In the third and seventh lines from the top of page 199, read "Ham- 

 ilton " for " Chemung." In the fifteenth and sixteenth lines from the bottom of page 

 201, read "Edwards & Haime, 1850," for "Lonsdale, 1839, Sil. Syst., p. 691, and 

 E. & H." For the word "lamelke," in the definition of Zaphreutis, on page 208, 

 read " septa," and add Clifford as an author of the genus with Rafinesque. On page 

 209, under Z. elliptica, read "Pal., No. 8," instead of Pal, No. 6." 



Fig. 1197.— Am plex- 

 us blairi. 



Actinocystis variabilis, 

 Whit eaves, 1892, 

 Cont. to Can. Pal., p. 

 271, Devonian. 



Alveolites roemeri refer to 

 Cladopora. 



Amplexus blairi, A. bi- 

 costatus, A. cornicu- 

 luin, S. A. Miller, 



1891, Advance Sheets 

 17th Rep. Geo. Sur. 

 Ind., p. 8. The blairi 

 and corniculum from 

 the Chouteau lime- 

 stone and bicostatus 

 from the Burlington 

 Group. 



cinctutus, S. A. Miller, 



1892, 18th Rep. Geo. 

 Sur. Ind., p. 5, Niag- 

 ara Group. 



coralloides, probably, not an American 

 species. 



Chetetes ponderosus, Rominger, 1892, Am. 

 Geol., vol. 10, p. 61, Up. Held. Gr. 



Ccenograptus, Hall, 1868, 20th Rep. N. Y. 

 Mus. Nat. Hist, pp. 210, 211, 251. [Ety. 

 koinos, living together; grapho, I write.] 

 Polypary compound, developed bilater- 

 ally from the initial point; cellules on 

 one side of slender branches, which are 

 developed on one or two sides of a long 

 slender axis or rachis, the free extremi- 

 ties of which are likewise celluliferous. 

 Not branching dichotomously. Type C. 

 divergens. 

 divergens, Hall, 1859 (Graptolithus diver- 

 gens), Pal. N. Y., vol. 3, p. 509, Hud. 

 Riv. Gr. 

 gracilis, Hall, 1847 (Graptolithus gracilis),. 

 Pal. N. Y., vol. 1, p. 274, Utica Slate. 



