Distribution of Genera and Species. 





Terranes. 



Genera and Species. 



6 



"5 



o 



03 



s 





.22 



3 



SPONGI^. 

 Hyalostelia, sp . _ , _ 







X 







HYDRO ID A. 

 Leptograptus fiaccidus, Hall 





X 



X 





sp :___. 



Nemagraptus caplllaTis, Emmons. _. __ _ 







X 



" sp. __ __ 











X 



Didym.nqra.'phi.fi hifidiifi^ TTnll 











X 



" constrictus^ Hall 











X 



" extensus, Hall _ _ 











X 



" furcillatus, Lapworth. __ __ _ 











X 



" pennatuius, Hall . _. _ . 











X 



'< sp .- _ .- _ 











X 



Teiragraptus approximatus, Nicholson . . . 











X 



" caduceus, Salter (= T. blgshyi, Hall). 

 " de7iticulatus^l^?i\\ 











X 











X 



" fruticosus, Hall 



, 









X 



" headi, RaW _ _. _ . 











X 



" hicksi, Lapworth __ _ _. 











X 



" quadribrachiatus^ Hall _ . 











X 



" serra. Bronffniart {=^T. hryonoides. 

 Hall) . 











X 



Dichograptus octobrachiattcs, HaW . 











X 



" richardsoni^ Hall __ _ . . 











X 



" ramiclus, Hall . . _ __ 











X 



" SD. 











X 



Loganograptus logani, Hall _ _. _.. 











X 



Clonograptus Jiexilis, Hall_- _ ._ 











X 



" rigidus, Hall_ _. _..___ 











X 



" sp. _..-__. 











X 



Goniograptusthureaui^ 'McCoy, var. Helwyni^ Ami_ 

 Diplog7'aptus dentatus, Brongniart (= D. pristini- 

 Jormis^ Hall . . _ 











X 











X 



" sp. und. _ __ 





X 









" follaceus^ Murchison _ . _. 







X 

 X 

 X 

 X 

 X 





" angustifollus - _ .. 











" 7'ugosus, Emmons . . 











" muc7'onatus, Hall. _ 











" whitjieldi, Hall. _. _ 











" t7'ico7'nis, Carruthers _. 









? 



•' sp. nov, _ _. _. _.. 



=' 











Dieellograptus anceps, Hall_. _ , _. 







X 



X 

 X 





" moffatensis^ Carr., var. dLva7^lcatm, 

 Hall ... _. _. 











" forcha7n7neri, L. 













(495) 



