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20 NEW YORK STATE MUSEUM 



We can then distinguish three larger faunal zones, namely: 



1 That of Diplograptus mohawkensis 



Corynoides calicularis 



2 That of Lasiograptus eucharis 



3 That of Climacograptus spiniferus 



Climacograptus typicalis M 



. Diplograptus macer ^^ 



All three of these zones are absent in the typical Utica section. ■ 

 Another series of sections through the " Utica " shale, or at 

 least its lower part, is afforded by the gulfs of Flat creek at 

 Sprakers and of Canajoharie creek at Canajoharie. These places 

 are about 20 miles west of the Chuctenunda sections and halfway 

 between the latter and the typical Utica section of the Utica region, i 

 The Canajoharie creek and Sprakers sections have been briefly ' 

 described by Prosser and Cumings (title 33, page 638). They record 

 at the former 53+ feet of Tribes Hill (Fucoidal) limestone, 

 underlying 17 feet of thin bedded dark blue, very fossiliferous 

 Trenton limestone with shaly partings. A distinct unconformity 

 separates the two. About 300 feet of very black, bituminous slate 

 referred to the lower " Utica " formation were found in the glen. 

 The following fossils are cited from the Trenton : 



1 Rafinesquina alternata {Con.), Hall and Clarke (c) 



2 Calymmene callicephala Green (?) (r) 



3 Orthis (Dalmanella) testudinaria Dalm. (a) 



4 Asaphus platycephalus Stokes (c) 



5 Monticulipora (Prasopora) lycoperdon Say. (r) 



6 Modiolopsis mytiloides Hall ( ?) (rr) 



7 Tellinomya levata Hall (rr) 



8 Zygospira recurvirostris (J/a//), PFwc/j. and Schuch. (rr) 



9 Plectambonites sericeus (Sozvb.), H. and C. (c) 



10 Trinucleus concentricus Eaton (r) 



11 Atrypa (Protozyga) exigua Hall (rr) 



12 Ceraurus pleurexanthemus Green ( ?) (rr) 



13 Murchisonia bellicincta Hall (rr) 



14 Murchisonia gracilis //a// ( ?) (rr) 



15 Camarella cf. volborthi Bill. (rr) 



16 Stictopora sp. (r) 



and the following from the " Utica " which is stated to contain a 

 larger number of fossils than has been found in the more eastern 

 exposures : 



1 Lingula quadrata (Eich.), Hall (?) (c) 



2 Plectambonites sericeus (Sowb.), H. and C. (a) 



3 Orthis (Dalmanella) testudinaria Dalm. (c) 



