66 



ENVIRONMENT OF VERTEBRATE LIFE, ETC. 



[Abbreviations: x, = rare, at one or more localities; c = common; a = abundant ;aa = very abundant.] 



Endothyra ? sp x 



Serpula ? sp x 



Vermes indet. (trails?) x 



Crinoidea (plates and stems) a 



Rhombopora lepidodendroides? x 



Lingula umbonata x 



Orbiculoidea missouricnsis x 



Rhipidomella pecosi x 



Derbya crassa a 



Derbya robusta x 



Chonetes granulifer aa 



Productus cora c 



Productus semirecticulatus x 



Productus pertenuis c 



Pustula symmetrica x 



Pustula nebraskensis a 



Strophalosia sp x 



Spirifer cameratus x 



Ambocoelia planiconvexa aa 



Composita subtilita x 



Composita sp x 



Solenomya radiata x 



Solenomya soleniformis x 



Solenomya trapezoides? x 



Prothyris elegans c 



Solenopsis solenoides x 



Edmondia? scutum x 



Edmondja ovata var. levis x 



Edmondia gibbosa x 



Edmondia sp x 



Nucula anodontoides a 



Nucula ventricosa x 



Nucula parya aa 



Anthraconeilo taffiana a 



Yoldia propinqua x 



Yoldia sp x 



Leda bellistriata ? c 



Leda meekana a 



Parallelodon obsoletus c 



Aviculipinna americana x 



Aviculipinna nebraskensis x 



Pseudomonotis hawni x 



Myalina subquadrata c 



Myalina pernifprmis x 



Schizodus affinis ? x 



Schizodus ulrichi ? x 



Aviculipecten rectilaterarius c 



Acanthopecten carboniferous c 



Deltopecten occidentalis a 



Pectenoidea (fragments) x 



Lima retifera x 



Allerisma terminale c 



Pleurophorus oblongus? x 



Pleurophorus occidentalis a 



Pleurophorus cf. obsoletus c 



Pleurophorus? sp c 



Pleurophorella geinitzi x 



Astartella gurleyi x 



Astartella concentrica x 



Pelecypoda indeterminata (several species) x 



Bellerophon crassus var. wewokanus x 



Patellostium montfortianum aa 



Patellostium kansasensis x 



Bucanopsjs perlata a 



Bucanopsis stevensana? x 



Bucanopsjs meekiana x 



Bucanopsis? sp x 



Euphemus carbonarius aa 



Pharkidonotus percarinatus x 



Pharkidonotus percarinatus var. tricarinatus ... a 



Worthenia cf. speciosa a 



Worthenia (Orestes) intertexta a 



Phanerotrema grayvillense a 



Schizostoma catilloides x 



Loxonema semicostatum x 



Zygopleura plicata a 



Zygopleura rugosa x 



Zygopleura scitula x 



Zygopleura sp x 



Soleniscus paludinaeformis? x 



Bulimorpha chrysalis x 



Sphserodoma ? brevis x 



Sphaerodoma ? primigenia x 



Sphaerodoma ? primigenia var. intermedia x 



Sphserodoma ? ventricosa x 



Aclisina swallowana x 



Aclisina? sp x 



Orthonema quadricarinatum x 



Orthonema cf. subtaeniatum x 



Orthonema ? sp x 



Minute, open-spiraled gastropod x 



Gastropoda indeterminata (coils) x 



Orthoceras sp x 



Pseudorthoceras knoxense x 



Tainoceras occidentale x 



Ostracoda a 



Eumalacostracean arthropod fragments x 



Boring organism x 



"True, this list of Ames limestone fossils contains many that occur in the 

 Pennsylvanian strata of this and other states, but that is no reason why they 

 may not have continued to live on into Permian time. 



"The Permian or Permo-Carboniferous age of these Conemaugh red beds is 

 also confirmed by fossil plant remains recently discovered a short distance above 

 the horizon of the Ames limestone, as related to me in a personal communication 

 by Mr. David White, chief geologist of the United States Geological Survey, who 

 states that a species of Callipteris, a genus diagnostic of the Permian beds, has 

 recently been discovered in the upper half of the Conemaugh. In this connection 

 it is pertinent to quote here the opinions of the writer concerning the age of these 

 Conemaugh beds, as published in the reports of the West Virginia Geological 

 Survey, beginning with his first description of the Conemaugh series as given in 

 volume n, Coal Report, under date of June 15, 1903, pages 225-227. 



