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Crepipora solifla ririch ^ 
" venusta Ulrich 
Cheilopoi-ella tiabellata I'lrit'h 
Spatiopora aspera Ulrich 
" lineata Ulrich 
maculosa Ulrich 
•' moiitifera Ulrich 
" tut>ci'< iihita l<:(i. and Hainie 
Dicranopora emaiei-nta Nich. 
" fragilis Hillings , 
" intenioilia Millei' 
Pachydictya fencstellitt>i)ins Nich 
Ptiloilictya falcil'orinis Nich 
hilli Jaines 
inaciilata Ulrich 
" niaguiiica Miller 
" pavoriia (!'( )rb 
" ponderosa Ulrich 
" variabilis Ulrich 
Graptodictya perelegaiis Ulrich 
Arthropora sp 
r I . >! 
' shafferi Meek 
sp 
St!ct(i|iorella interstincta Ulrich 
Kcnestclla o.xt'urdHiisits Ulrich 
I'hyllopdi-iiia <'lathrata >U ami D 
" variolata Ulrich 
Arthrostylus curtus Ulrich 
" tenuis Ulrich 
Paleschara beani James 
Orthis bellula James 
•' ellaHall 
" emacerata Hall 
•' nieeki Miller 
" fissicosta Hall 
" insculpta Hall 
" jamesi Hall 
" multisecta James 
" " var. cyclus James ... 
" occidentalis Hall 
" sinuata Hall 
" plicarplla Hall 
" retiorsa Suiter 
" subipiadrata Hall 
" sectostriata Ulrich 
" scovillei Miller 
Platystrophia crassa J a mes 
" acntilirata James 
" laticostata James 
" lynx Von Buch 
small form 
Rhynchonellacapax Conrad 
dentataHall 
" pcrlamellosa Whitfield 
" fi-ingilla. Billings 
Zygospira cincinnatiensis James 
" concentrica 'Jlrich 
" kentnckyensis James 
" modesta Say 
iGlassia Schuchert and Ulrich 
f^ ^ 
1 This name is proposed for the shell figured and described by Meek in 
vol. i, Ohio Pal., p. 127, pi. xi, figs. ia-\d, under the name Zygospira 
Hcadi Billings (sp.). Recent investigations of excellent material, belong- 
ing to Mr. Charles Schuchert's extensive collection of palaeozoic brachi- 
opoda, show that our shell is distinct from the Canadian form, and that 
it possesses internal spires arranged precisely as in Davidson's new genus 
