1911] The Ottawa Naturalist 195 



Heavy-bedded limestones from 20 to 40 feet above the 

 Beyrichia zone are very fossiliferous in places, but it is difficiilt 

 to get good specimens. A Cornulites is very abundant in some 

 of the layers. The species which have so far been recognized are: 

 Zygospira recurvirostris , Lophospira hicincta, 

 Raphistomina lapicida, Pterotheca sp. ind. 



Lophospira perangulata, 

 The next bed above this which has furnished any good 

 fossils is the cream-colored sandstone which is exposed at the 

 Hogs Back and near Montreal Road. Nearly all the species 

 identified were described by Dr. Whiteaves. 



Lingula lyelli, Vanuxeniia parvula, 



Clionychia ottawaensis* Soivteria canadensis, 

 C.f gibbosa, Holopea sp. ind., 



Modiolopsis fabaformis, Spyroceras sp. ind., 



Orthodesma antiquatum, Isochilina? armata.-\ 



In a dark grav dolomitic limestone within 10 feet above this 

 layer, the following species have been found: 



Tetradium columnare, Bathyurus superbus. 



Dalmanella sp. ind., 

 About 15-20 feet above this layer are beds of shaly limestone 

 in which the following species are rather common: 

 Dalmanella circularis, Bathyurus extans, 



Strophomena incurvata, Onchometopus simplex, 



Cyrtodonta huronensis, Isotelus sp. ind. 



Just above the preceding are thin layers in which a species 

 of Beatricea and Cyrtodonta huronensis are abundant. In the 

 upper 15 feet of the section fossils are rather abundant, but there 

 does not seem to be a very great variety. The following are the 

 more common ones : 



Tetradium cellulosum, Bathyurus extans, 



T. columnare, B. spiniger, 



* Strophomena incurvata, Bumastus milleri, 



Helicotoma planulata, Isotelus gigas. 



Spyroceras sp., 



These lists, incomplete as they are, show at once that all the 

 fossils which belong to the typical Chazy are beneath 

 the clavigera horizon, and the deposits of Chazy age 

 end with the limestone which at the Hogs Back and Rock- 



*Dr. Ulrich writes me that this is probably an Ainbonychia, and 

 C.f gibbosa a Vanuxemia, while Vanuxeniia parvula is a Ctcnodonta. The 

 types are not accessible at this writing. 



tidentified by Dr. Ulrich. 



