570 NEW YORK STATE MUSEUM 



Zealand the entire Lower Siluric is represented by graptolite 

 shales v/ith forms of world wide distribution. 



Zone with Diplograptus dentatus and Cryptograptus antennarius 



In the exposure produced by the construction of the dam of 

 the Lansingburg waterworks two graptolite beds were noticed: 



Graptolite bed 6 



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



1 Phyllograptus angustifolius Hall c 



2 Ph. sp. nov. c 



3 Diplograptus dentatus Brong. r 



4 Retiograptus tentaculatus Hall c 



5 Gf. Trigonograptus ensiformis Hall (fragments) r 

 A larger fauna was obtained from 



Graptolite bed 1 



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

 which are profusely covered with specimens. It furnished the 

 following fauna. 



1 Dendrograptus sp. nov. c 



2 Dictyonema sp. nov. cc 



3 D. sp. nov. c 



4 D. (Desmograptus) cancellatum Hopk. c 



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



6 Callograptus diffusus Hall r 



7 C. sp. nov. r 



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. r 



14 Nemagraptus sp. indet. c 



15 Diplograptus dentatus Brong. (— D. pristiniformis Hall) ccc 



16 D. inutilis Hall r 



