LETTER OF TRANSMITTAL. F*. xiii 



iferous. The list of forms found in its soft shales is a long 

 one, although these strata are seldom well exposed for ex- 

 amination, and most of the collections were made at a few 

 points, chiefly Clark's mill near Bloomfield. Llngula 

 spaiiosa, Lhigula centrilineataf Atry pa reticularis, Spir- 

 ifera vanuxemi, Spirifera saffordi, Rhy iichonella nucle- 

 olata, Rhynclwnella mutabilis, Meristella bella, Meristella 

 lo3vis, Rensellwria mutabilis, Discina ampla, Discina 

 discus, Slrophomena looolworthaua ; Euomphalus pro- 

 fundus; Megambonia aviculoidea, Modiolopsis dubia, 

 Cypricardinia lamellosa ; Leperditia alia, Beyrichia, 

 granulata, Beyrichia notata ; Orthoceras longi camera- 

 turn; Lepadocystites ; Ch&tetes abruptus have been deter- 

 mined. 



No Corniferous fossils have been found. 



In the JIarcellus division of No. VIII appear Atrypa 

 reticularis, Leiorhyncus limitaris, Slrophomena rugosa, 

 Amboccelia unibonata, Discina seneca, Phacops rana, 

 Beyrichia ungula (new species), Coleolus (Coleoprion) len- 

 uicinctus, Styliola fissurella. 



The Hamilton division of No. VIII is as a whole the 

 richest fossiliferous formation of the district, and the list 

 here given might be considerably extended by further sys- 

 tematic collections ; Strophodonta perplana, Strophodonta 

 in&quistriata, Vitulina pustulosa, Chonetes lepidus, Cho- 

 netes mucronatus, Chonetes setigerus, Discina media, Dis- 

 cina minuta, Atrypa spinosa, Atrypa aspera, Atrypa 

 Jiystrix, Atrypa reticularis, Sperifera medialis, Spirifera 

 fimbriata, Spirifera mucronata, Spirif era ziczac, Spirifera 

 acuminata, Spirifera granulifera, Rhynchonella hors- 

 fordi, Leiorhynchus multicostatum, Ambocoelia umbonata, 

 Cyrtina hamiltonensis\ Pholidops hamiltonensis, Strej)- 

 torynchus chemungense (var.), Productella truncata, Pro- 

 ductella spinulicosta, Nucleospira concinna, Orthis pen- 

 elope, Or this vanuxemi, Crania hamiltonio3, Cryptonella 

 rectirostra, Tropidoleplus carinatus, Terebr alula linck- 

 103111. slrophomena rlwmboidalis ; Loxonema delphicola, 

 Nuculites oblongatus, JSuculites triqueter, Eodon tenui- 

 striatus, Eodon bellistriatus, Sanguinolites iruncatus, 



