74 W. J. Harris : Ordovician Rocks. 



EXPLANATION OF PLATE I. 

 (New species figured by W. J. Harris and R. A. Keble). 



Fig. L — Cardiograptus morsus, gen. et sp. nov. narrow form. x #, 



Chinamen's Creek, Q.S. 15 N.W., Note 6. 

 2. — C. morsus. Another specimen showing typical shape of rhab- 



dosome. x |. Same locality. 

 3. — C. morsus. Another specimen, sliglitly enlarged. Same 



locality. 

 4. — C. morsus. A juvenile form showing sicula ; lines somewhat 



hardened to portray structure. x 3. Same locality. 

 5. — Diplograptus gnomonicus, sp. nov. Typical preservation 



facies, the reversal of the direction of the thecal walls is 



indistinctly shown. x 2. Same locality. 

 6. — D. gnomonicus (mag). Figure shows varying inclination of 



thecae. x 6. Same locality. 

 7. — Oncograptus biangulatus, sp. nov. Proxin)al end of rhab- 



dosome. x |. Same locality. 

 8. — O. biangulatus. Typical rhabdosome. x #. Same locality. 

 9. — 0. biangulatus. Juvenile form. x 2. Same locality. 



