. Bulletin of the Geological Society of America. Geology. SECTIONS B AND C 153 The following is the list of species found at this locality ; all belong the coral layer, or middle division of the Hamilton group : to 3. Phacops rana Green. 15. Orthoceras cf. lambtonense Whit- 186. eaves. 193. 31. Orthonychia (Platyceras) conicum 204. Hall. 205. 32. Diaphorostoma lineata (Conrad). 206. 58. Craniella hamiltonise (Hall). 208. 60. Stropheodonta concava Hall. 209. 61. Stroph. demissa (Conrad). 212. 64. Pholidostrophia iowaensis (Owen). 215. 79. Rhipidomella penelope Hall. 218. 80. Kh. vanuxemi Hall.
. Bulletin of the Geological Society of America. Geology. SECTIONS B AND C 153 The following is the list of species found at this locality ; all belong the coral layer, or middle division of the Hamilton group : to 3. Phacops rana Green. 15. Orthoceras cf. lambtonense Whit- 186. eaves. 193. 31. Orthonychia (Platyceras) conicum 204. Hall. 205. 32. Diaphorostoma lineata (Conrad). 206. 58. Craniella hamiltonise (Hall). 208. 60. Stropheodonta concava Hall. 209. 61. Stroph. demissa (Conrad). 212. 64. Pholidostrophia iowaensis (Owen). 215. 79. Rhipidomella penelope Hall. 218. 80. Kh. vanuxemi Hall. 220. 84. Camarotcechia thedfordensis Whit- 221. eaves. 222. 91. Cyclorhina nobilis Hall. 92. Eunella attenuata Whiteaves. 225. 97. Atrypa reticularis (Linn.). 227. 105. Spirifer mucronatus var. thedford- 228. ensis S. and G. 230. 111. Cyrtina hamiltonensis Hall. 231. 114. Nucleospira concinna Hall. 233. 117. Parazyga cf. hirsuta Hall. 143. Reteporina prisca Nich. 237. 171. Spirorbis omphalodes Nich. 238. Crinoid joints. Nucleocrinus elegans Conrad. Dolatocrinus (spines). Aulopora serpens Goldfuss. Monilopora antiqua Whiteaves. Ceratopora intermedia (Nich.). C. dichotoma Grabau. Trachypora elegantula Billings. Cladopora frondosa Bill. Alveolites goldfussi Bill. Favosites placenta Rominger. F. turbinata Bill. F. billingsi Rom. F. alpenensis Winchell. Zaphrentis sp. Z. prolifica Bill. Cyathophyllum conatum Hall. C. cf. robustum Hall. Heliophyllum halli E. and H. H. tenuiseptatum Bill. Craspedophyllum subcsespitosum (Nich.). Cystiphyllum vesiculosum Goldfuss. C. conifollis Hall. Stratigraphically section B is below section A. SECTION C-BR1CKYARD The section here exposed comprises the following strata in descending order: Drift 1 foot 3. Clay, mingled with drift, full of corals of the same type as those found at section B, this being in fact the disin- tegrated '' coral layer " 2 feet 2. Encrinal limestone in several beds, the lowest separated from those above by a two to four
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