66 



ENVIRONMENT OF VERTEBRATE LIFE, ETC. 



(Abbreviations: x. = rare, at one or more localities 



Endothyra ? sp 



Serpula ? sp 



Vermes indet. (trails?) 



Crinoidea (plates and stems) 



Rhombopora lepidodendroides? 



Lingula umbonata 



Orbiculoidea missouriensis 



Rhipidomella pecosi 



Derbya crassa 



Derbya robusta 



Chonetes granulifer 



Productus cora 



Productus semirecticulatus 



Productus pertenuis 



Pustula symmetrica 



Pustula nebraskensis 



Strophalosia sp 



Spirifer cameratus 



Ambocoelia planiconvexa 



Composita subtilita 



Composita sp 



Solenomya radiata 



Solenomya soleniformis 



Solenomya trapezoides? 



Prothyris elegans 



Solenopsis solenoides 



Edmondia? scutum 



Edmondia ovata var. levis 



Edmondia gibbosa 



Edmondia sp 



Nucula anodontoides 



Nucula ventricosa 



Nucula parva 



Anthraconeilo taffiana 



Yoldia propinqua 



Yoldia sp 



Leda bellistriata ? 



Leda meekana 



Parallelodon obsoletus 



Aviculipinna americana 



Aviculipinna nebraskensis 



Pseudomonotis hawni 



Myalina subquadrata 



Myalina perniformis 



Schizodus affinis ? 



Schizodus ulrichi ? 



Aviculipecten rectilaterarius 



Acanthopecten carboniferous 



Deltopecten occidentalis 



= common; a = abundant;aa = very abundant.] 



X Pectenoidea (fragments) x 



X Lima retifera x 



X Allerisma terminale c 



a Pleurophorus oblongus? x 



X Pleurophorus occidentalis a 



X Pleurophorus cf . obsoletus c 



X Pleurophorus? sp c 



X Pleurophorella geinitzi x 



a Astartella gurleyi x 



X Astartella concentrica x 



aa Pelecypoda indeterminata (several species) x 



c Bellerophon crassus var. wewokanus x 



X Patellostium montfortianum aa 



c Patellostium kansasensis x 



X Bucanopsis perlata a 



a Bucanopsis stevensana? x 



X Bucanopsis meekiana x 



X Bucanopsis? sp x 



aa Euphemus carbonarius aa 



X Pharkidonotus percarinatus x 



X Pharkidonotus percarinatus var. tricarinatus. . . a 



X Worthenia cf. speciosa a 



X Worthenia (Orestes) intertexta a 



X Phanerotrema grayvillense a 



c Schizostoma catilloides x 



X Loxonema semicostatum x 



x Zygopleura plicata a 



X Zygopleura rugosa x 



x Zygopleura scitula x 



X Zygopleura sp _. x 



a Soleniscus paludinaeformis? x 



X Bulimorpha chrysalis x 



aa Sphaerodoma ? brevis x 



a Spheerodoma ? primigenia x 



X Sphaerodoma ? primigenia var. intermedia x 



X Sphaerodoma ? ventricosa x 



c Aclisina swallowana x 



a Aclisina? sp x 



c Orthonema quadricarinatum x 



X Orthonema cf. subtaeniatum x 



x Orthonema ? sp .' x 



X Minute, open-spiraled gastropod x 



c Gastropoda indeterminata (coils) x 



X Orthoceras sp x 



X Pseudorthoceras knoxense x 



X Tainoceras occidentale x 



c Ostracoda a 



c Eumalacostracean arthropod fragments x 



a 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 II, Coal Report, under date of June 15, 1903, pages 225-227. 



