22 



THE DEVONIAN OF MISSOURI. 



The following is a list of all of the identifiable fossils known 

 to the writer. Fragments indicate the presence of nearly as 

 many more species. The crinoids and corals are represented by 

 many more species but it is difficult to get satisfactory descrip- 

 tive materials. 



LIST OF SPECIES FROM THE MINEOLA LIMESTONE 



Coelenterata 

 Acervularia davidsoni Edwards and 



Haime (r) 

 Ceratopora grabaui Branson (r) 

 Favosites alpenensis Winchell (c) 



Crinoidea 



Megistocrinus broadheadi Branson (r) 

 Megistocrinus mineolaensis Branson (r) 

 Megistocrinus missouriensis Branson (r) 

 Stereocrinus moori Branson (c) 

 Stereocrinus springeri Branson (c) 

 Stereocrinus vandiveri Branson (c) 



Blastoidea 



Nucleocrinus verneuili (Troost) (r) 



Bryozoa 



Coscinium missouriensis Branson (r) 

 Cyclotrypa communis Ulrich (c) 

 Cyclotrypamagna-monticidata Branson (r) 

 Cystodictya mineolaensis Branson (r) 

 Fenestella missouriensis Branson (r) 

 Hemitrypa mineolaensis Branson (c) 



Brachiopoda 



Athyris vittata Hall (a) 

 Atrypa reticularis (Linnaeus) (c) 

 Cranaena romingeri (Hall) (c) 

 Cyrtina hamiltonensis Hall (c) 

 Eunella lincklaeni (Hall) (a) 

 Gypidula mineolaensis Branson (r) 

 Pentamerella arala (Conrad) (a) 

 Pholidostrophia iowaensis (Owen) (r) 

 Productella spinulicosta Hall (r) 

 Pugnoides swallovi Branson (r) 



Reticularia fimbriata (Conrad) (r) 

 Schizophoria cf. propinqua (Hall) (r) 

 Schuchertella cf. pandora (Billings) (r) 

 Spirifer euryteines Owen (r) 

 Spirifer subvaricosus Hall and Whit- 

 field (r) 

 Spirifer varicosus Hall (c) 

 Stropheodonta demissa (Conrad) (c) 

 Stropheodonta inequiradiata Hall (,r) 

 Stropheodonta mineolaensis Branson (r) 

 Syringothyris n. sp. Branson (r) 



Pelecypoda 



Conocardium ohioense (Meek) 



Gastropoda 



Euryzone lucina (Hall) (r) 

 Euryzone mineolaensis Branson (r) 

 Platyceras cf. calantica Hall (r) 

 Platyceras carinatum Hall (r) 

 Platyceras conicum Hall (r) 

 Platyceras cf. erectum Hall (r) 

 Platyceras cf. nodosum Conrad (r) 

 Pleurotomaria sp. undet. (r) 



Cephalopoda 



'Jomphoceras sp. undet. (r) 



Trilobita 



Proetus crassimarginatus Hall (r) 



Pisces 



Dinichthys pustulosus Eastman (r) 

 Ptyctodus calceolus (Newberry and Wor- 



then) (c) 

 Unidentified fish remains, (r) 



The dominant species in Central Missouri are Eunella 

 lincklaeni (Hall) and Pentamerella arata (Conrad). Athyris 

 vittata (Hall), Hemitrypa mineolaensis Branson, Cyrtina hamil- 

 tonensis Hall, and Spirifer varicosus Hall are important members 

 of the fauna but are far less abundant than the first two species 

 listed. In the crinoidal member various species of Megistocrinus 

 and Stereocrinus are abundant but nearly all of the heads are 

 exfoliated and specific identifications are impossible. The 

 crinoids are easily dominant in the crinoidal member. 



