PALEOZOIC. 



IIYDPiOZOA. 



CAMBRIAN AND SILURIAN'. 



CAMBRIAN. LOWKR SIL. UPPER SILUlilA.N. 



SPECIES. 



DiCEANOGEAPTID.E. 

 Dicellograptus... MopTclnson, 1S70 

 — caduceus Lapw 



— complanatus ... Lapio. 



— divaricatus Hall . 



— furcatus llall , 



— intortus Lapic. 



— patulosiis Lapiv. 



— pumilus LaiJW. 



— sextans Jfnll . 



DiCEAXOr.RAPTlD^ {Lapmorth) 

 Dicranograptua ... Hall, 1865 



— Moffatensis Zapw 



— spiniffr Lapw 



— tardiusculus 



— ziczac Lapw 



Dictyonema Hall, 1852 



Dictyograptus Hopk 



— corrugatellum . . . Lapw 



— dolieatulum Lapw 



— Moffatensis Lapw 



— sociale., 



Salt. 



— venustum Lapw. 



DiCnoGEAPTIBJ!. 

 Didymograptus . . . M'Coii, 1851 , 

 — constrictus Hall 



— similis Hall .. 



— superstes Lapw. 



DiriOGEAPTID.I!. 

 Dimorphograptus Lap worth, 1S76 



— aciiminatiis JS'ich 



— olongatus Lapw 



— Swanstoni Lapw 



DlPLOGEAPTIB^. 

 Diplograptus I\I'Cof/. iSjo .. 



— aculeatit.'i Lapw 



— himucYOiUitus ... Nich 



tci S .S 



tJ 



" i'2 



5"S 



KEFKRKXCES. 



Vide Idiograptus. 



Ann. W.afr. Nat. Hist. 4 sit vol. iv, 

 (l,asio{,T"ai)tiis) 



236, t. II, f. 12. 



393 



Cat. West. Scott. Foss. p. 5, t. 4, f. 83; ib. Grapto. Co. Down, 

 JU-lfast Nat. Hist. Field Club, p. I4I, t. 7, f. 3, 1876. 



Ann. Mag. Nat. Hist. 5 ser. vol. v, p. iCo, t. j, f. 17. 



Urapto. Quebec Group, p. 13; ib. Ijajiw. Helfast Nat. Field 

 Club, 1S76, p. 141, t. 7, f. 10. 



? I)icrano(frapfu^-, Graptulithit.s, Geol. Surv. Canada, finii)to. 

 Quebec Group, p. i j, 40, 41, 4O, 57. 



Ann. Mag. Nat. Hist. 5 ser. vol. v, p. 161, t. 5. f. ly. 



Ann. Mag. Nat. Hist. 5 ser. vol. v, p. 162, t. 5, f. 18. 



Tide Q. .1. Geol. ."^oc. vol. xsxiv, p. 331. 



Pal. New York, vol. i, p. 273, t. 74. 



ViiU Dicellograptus. 



Doubtful. 



Tide Q. J. Geol. Soc. vol. .wxviii, p. 5CS, 58^, 591. 



Cat. West. Scott. Foss. t. 3, f. 77; ib. Grapto. Co. Down, 

 Belfast Nat. Field Club, "p. 141, t. 6, f. 42". 



Q. J. Geol. Soc. vol. xxxvii, p. 172, t. 7, f. 3. 



Q. J. Geol. Soc. vol. xxivii, p. 172, t. 7, f. 2. 



Cat. West. Scott. Foss. p. 7, t. 4, f. y7 ; ib. Belfast Nat. 

 Field Club, 1876-7, p. 143,!. 7, f. 17. 



(Addenda.) ? LUcli/onema fahelliformif, Eicbw. Leth. 

 Kossica, vol. i, p. 369; ib. F. Romer, Die Foss. Fauna der 

 Siluriescben Diluvia Gesehube Sadeuitz bie Dels in Nieder- 

 seblcsiln, 4to. p. 32. 



Q. J. Geol. Soc. vol. xxxvii. p. 171, t. 7, f. 1. 



OrapiolUhiis, Quebec Group, Geol. Surv. Canada, t. 1, 



Grapto. Quebec Group, Geol. Surv. Canada, p. 78, t. 2, f . 1-5. 



Cat. West. Scott. Foss. p. 6, t. 3, f. 74. ? drapto. sagi/lanii.t, 

 Hall, Pal. New York, vol. i, t. 74. D. superstes, Grapto. 

 Co. Down, Belfast Nat. Field Club, p. 142, t. 7, f. Ij". 



Vide Diplograptus. 



Diploffraptui',Oco\.Mai:. Dec II, vol. iii, p. 574, t. 20, f. 12, j 

 1S76; ib. Belf. Nat. Field Club (Co. Down), p. 132, t. 6, f. 6. ! 



Diploijraptus, Geol. Mag. Dec. II, vol. iii, t. 20, f. 13; ib. 

 Belfast Nat. Field Club (Co. Down), p. 131, t. 6, f. ?. 



