22 



Mr. C. Lapwortli on the Geological 

 Table X. {continued). 



Cryptograptus antennarius, Hall. 



Hopkinsoni, Nich 



Climacograptus cpelatus, Lapw. . 



Sckarenbergi, Lapw 



confertus, Lapw 



caudatus, Lapw 



bicornis, Hall 



tubuliferus, Lapic 



normalis, Lapw 



rectangiilaris, M' Coy 



innotatus, Nich 



Family VII. Lasiogkapttd^. 

 Lasiograptus Harknessi, Nich. . . 



costatus, Lapw , . 



retusus, Lapw 



■ margaritatus, Lapw 



Hallograptus biuiucronatus, Nich. 



mucronatus, Hall 



Glossograptus Hincksi, Hoplc. . . 



armatus, Nich 



ciliatus, Emmons 



Retiograptus tentaculatus, Hall . . 



Family VIII. Retiolitid^!. 

 (Retiograptus) eucharis, Hall . . 

 Clatbrograptus cuneiformis, Lapw 



Geinitzianus, Hall 



Gymnograptus Linnarssoni, Tullb 

 Trigonograptus lanceolatus, Nich. 



ensiformis, Hall 



tnmcatus, Lapw 



Retiolites Geinitzianus, Barr. . . 



fibratus, Lapw 



perlatus, Nich 



, var. ? Daironi, Lapio. . . 



obesus, Lapw 



Ordovician. 



Lower. Upper 



3 



SlLUEIAN. 



Lower. 



Middle. 



