1 68 Evolution and Distribution of Fishes 



Directly connected with our special theme is his state- 

 ment: "in certain places, such as the patches of light blue 

 clay, where the remains of small amphibians, sharks, etc., 

 are generally abundant, plant remains are also common," 

 indicating that the animals were entombed in or near their 

 natural habitat. A striking feature, that physically con- 

 nects these beds with corresponding ones of Europe is 

 brought out in his observation that: "The bluish clay is 

 copper bearing in many places." The term "Kupfer- 

 schiefer" would apply equally therefore to Texan as to 

 central European beds. 



The subjoined tabular list that he gives at once indi- 

 cates the variety of the fish-life, and their relation to the 

 "Illinois" beds of the "Upper Pennsylvania" or top of the 

 Carboniferous system. 



c a 



■jz a, 



Selachii 



Janassa strigilina 



Janassa gurleyana 



? Hybodus 



Ichthyotomi 



Pleuracanthus quadriseriatus 



Pleuracanthus gracilis 



Dicranodon texensis 



Dicranodon platypternus . . . 



Ctenacanthus amblyxiphias . . 



Anodontacanthus americanus 

 D'tpneusti 



Sagenodus dialophus 



Sagenodus fossatus 



Sagenodus paucicristatus . . . . 



Sagenodus periprion 



Sagenodus vinslovi 



Ceratodus favosus 



Gnathorhiza pusilla 



Crossopterygii 



Megalichthys nitidus 



Megalichthys ciceronis 



Actinopterygii 



Sphaerolepis arctata 



Spermatodus pustulosus 



Pyritocephalus sp 



Plan^somus palmaris 



