GRAPTOLITES OF NEW YORK, PART 2 539 



Diplograptus amplexicaulis Hall 



Page 361 



10 Group of specimens preserved in shale 



Transition shale, Sandy Hill, N. Y. 



1 1 Typical rhabdosome preserved in relief 



Trenton limestone, Middleville, N. Y. 



12 Typical specimen preserved in shale 



Transition shale, Sandy Hill, N. Y. 



13 Impression of specimen in limestone. Sicularend narrower in original 



Trenton limestone, Middleville, N. Y. 



Diplograptus amplexicaulis var. pertenuis nov. 



Page 365 



14 Group of typical specimens in demirelief (cotypes) 



Normanskill shale, power house at Lansingburg, N. Y. 

 15, 16 Strongly flattened specimens in shale. These figures are too wide 



in the reproduction 

 Upper Trenton shale (zone of Dipl. amplexicaulis), Brothers' 



quarry, Troy, N. Y. 



Diplograptus peosta Hall 



Page 372 



17 Specimen preserved in relief 



Maquoketa shale, Graf, Iowa 



Diplograptus angustifolius (Hall) 



Page 366 



19 Portion of a slab with group of typical specimens 



Normanskill shale, Glenmont, N. Y. 



20 Large rhabdosome. Too wide in reproduction 



Normanskill shale, power house at Lansingburg, N. Y. 



