58 



careous la^'er noted in other sectionvS as lying about six 

 feet above the upper Trilobite bed. This contains many 

 robust specimens of Spirifer miicronatus (Conrad), but few 

 other fossils are found. Mr. Albert Meyer has, however, 

 obtained some interesting fish remains from a fragment of 

 rock which probably came from this bed. 



About five feet of the shales below the Trilobite beds are 

 exposed. The upper two feet of these are highly fossiliferous. 

 The fossils are mainly brachiopods, of the genera Spirifer, 

 Stropheodonta, Rhipidomella, Athyris, Chonetes, etc. Below 

 this the shale is less fossiliferous, down to about five feet 

 below the lowest Trilobite bed. Here a hard calcareous 

 layer occurs, an inch or two in thickness, in which fossils are 

 very abundant. The large Spirifer granulosus (Conrad), 

 which was found to be characteristic of the Demissa bed, 

 and of the Encrinal limestone, occurs here in considerable 

 numbers. Many other fossils occur with it, among which 

 may be mentioned Tropidoleptus carinatus (Conrad), which 

 is almost absent from the shale between this bed and the 

 Encrinal limestone, but is abundant in the latter rock. Less 

 than a foot below this bed is another of similar character, 

 which however, is usually covered by the debris on the 

 beach. In this bed the little Favositoid coral, Pleurodictyum 

 stylopora (Eaton) is met with for the first time, this being 

 the highest bed in which the fossil occurs in this region. 

 Spirifer granulosus (Conrad) is also common in this bed, 

 and besides these, twenty other species of fossils have been 

 obtained from it. Among them should be mentioned a 

 specimen of Goniatites uniangularis Conrad, completely re- 

 placed by iron p^'rites, as well as a number of specimens of 

 Orthoceras similarly replaced. This bed is the upper one of 

 three, in all of which Pleurodictyum stylopora (Eaton) is 

 common, and to these beds it is restricted in this region. 

 These strata have, therefore, been named the Plein-odictyum 

 beds,* and will later be described more at length. 



^Faunas of the Hamilton Group, etc. 



