24 Bulletin 12 153 



ensis x, Discina sp., Diphyphyllum. sp., Favosites hemispheriais c, 

 Michelinia cyliyidrica c, Orthis livia r, Pentamerus 7iucleus f r, 

 Platyceras dumosuni r, Platystovia lineatu'm r, ProditRella sub- 

 aadeata var. catarafla r, Proetus canaliculahts r, Spirifer arEli- 

 segmenhis r, Spirifer byrnesi r, Spirifer euruteines r, Spirifer 

 gregarius a, Stropheodonta demissa c, Stropheodoiita heniispherica 

 c, Sb'opheodonta perplanax, Thecia minor c, Trochoiiema rectila- 

 tera r, Zaphrejitis giga^itea, Zaphrentis ungula c. 



Station z/i?.— Near the government jetty on the Indiana side 

 of the Falls. 



The following species were obtained from about 3' of the lowest 

 beds exposed at low water: 



Blothrophyllum sp. c, Conocardium ciineus a, Favosites hemis- 

 phericus c, Holopea sp. r, Modiomorpha mytiloides r, Pentamarella 

 arata r, Pleicrotomaria sp. r, Proetus crassimarginatus c, Proetus 

 microgemvta r, Spirifer gregarius r, Spirifer varicosus r, Stroph- 

 eodonta demissa, Stropheodonta perplaiia r, Terebratula lincklceni 

 c, Zaphrentis gig anteus a. 



Station ijB' . — Immediately above 17B the following species 

 were obtained from about two feet of hard grey limestone: 



A£linopteria boydi r, Atrypa reticularis c, Callonema bellatuhim c, 

 Callonema imitator f c, Chonetes mucronatus c, Conocardijun 

 cu7ietis a, Cyathophylltim rugosum. c, Cyrtijia hamilto7iensis r, Z?a/- 

 inanites aiichiops var. sorbrinus r, Dalmanites seleniirus r, Glypto- 

 desma occidentale r, Modiomorpha affinis a, Modiomorpha mytiloides 

 a, Orthis iowe^isis f t, Proetus crassimarginatus o., Ptychodesma n. 

 sp. r, Stropheodonta arElostriatus r, Stropheodonta demissa c, ^/w- 

 pheodonta perplana r, Turbo shiwiardi c, Zaphrentis giganteus c 



Statio7i ijB" . — About six feet above B' the limestone beds af- 

 forded the following species: 



Atrypa reticularis c, Cho7ietes 77iucro7iatus c, Proetus crassi7nar- 

 gi7iatus ? c, Spirifer acuminatus c, Sti^opheodonta demissa c, ^/ri?- 

 pheodo7ita he7nisphei'ica c. 



Statio7i ijA. — Near the south end of the J. M. & I. railroad 

 bridge the fine grained calcareous sandstones lying just below the 

 Black shale are quarried for cement. Three or four feet 6f rather 

 pure limestone separates these sandy beds from the Black shale 

 above. The "cement beds" here afTorded the following species: 



