570 NEW YORK STATE MUSEUM 



Zealaiul the t'Utirt* l^owtT Sihiric is represent «'<1 1»\ «;raptolite 

 sliales witli forms of woiM wide distrilmtion. 



Zone with Diplograptus dentatus and Cryptogxaptus antennarius 



In the exposure produced by the construction of the dam of 

 the I.ansinjjburj; waterworks two graptolite beds were noticed: 



GraptoUtc bed 6 



This bed contained, embedded in a massive dark mud rock: 



1 Phyllograptus angustifolius Hall c 



2 Ph. sp. 710V. c 



3 Diplograptus dentatus Bromj. r 



4 Retiograptus tentaculatus Hall c 



5 Cf. Trigonograptus ensiformis Hall (fragments) r 

 A larger fauna was obtained from 



araptoUtc hed 7 



This bed consists of soft, black shale, the bedding pianos of 

 which are profusely covered with specimens. It furnished the 

 following fauna. 



1 Dendrograptus sp. not. c 



2 Dictyonema sp. nov. cc 



3 I), sp. nov. c 



4 D. (Desmograptus) cancellatum Hopk. c 



5 D. (D.) sp. nov. c 



6 Callograptus diffusus Hall r 



7 C. sp. nov. V 



8 Ptilograptus plumosus Hall rr 



9 Loganograptus logani Hall rr 



10 Dichograptus octobrachiatus Hall (hexad type) c 



11 Didymograptus (Isograptus) gibberulus Nich. var. nanus, 



var. nov. c 



12 D. sp. nov. rr 



13 Leptograptus sp. nov. v 



14 Nemagraptus sp. indef. c 



15 Diplograptus dentatus lirong. (=D. pristiuiformis Hall) cce 

 ir, D. inutilis Hall r 



] 



