22 



44- Leiorhynchusinesacostalis. Middle Portage, eastward. 



45. Cyrtina Hamilton en sis. Middle Portage and Chemung, 



eastward, and Hamilton shales. 



46. Productclla speciosa. Middle Portage and Chemung. 

 47-8. Productella truncata. " lower beds. 



49. Stropheodonta mucronata. Middle Portage, eastward. 



50. Chonetes scitula. Portage and Chemung, locally very 



abundant. 



51. Cryptonella cudora. Middle, east Portage, rare in Che- 



mung. 

 52-3. Schizophoria impressa (both valves, interior casts). Mid- 

 dle, east Portage and E. and w. Chemung. 



54. Atrypa reticularis. East Portage and east Chemung. Very 



abundant in Hamilton beds below. 



55. Lingula complajiata. Middle Portage shale. 



56. Crania hamiltonice (showing muscular scars). Middle east 



Portage and below. 



57. The same; showing traces of Stropheodonta mucronata 



through the shell. 



58. Lingula punctata. Middle east Portage (and Chemung?). 



Explanation of Plate VIII. 

 (Portage fossils of various classes.) 



Fig. 



59. Conularia congregata. Middle, east Portage. APteropod. 



Regarded by .some as a Cephalopod. 



60. Stictopora meeki. Portage. A Bryozoan. 



61. Cladochonus sp. Lower Portage sandstone. A coralline 



form. 



62. Plumalina plnmaria. Middle to lower Portage, eastward. 



A Hydrozoan. Sometimes regarded as a fern. 



63. Phacops rana. Eower and middle Portage, eastward, rarely 



in Chemung. Abundant in Hamilton beds. A Trilobite. 



