Abstract

Lists of described Species

When, in 1886, C. A. White2 reviewed the invertebrate fauna of the formation now known as Morrison, he listed 21 species, as follows:

Unio felchii White Vorticifex stearnsii White 
Unio toxonotus White Valvata scabrida M. and H. 
Unio macropisthus White Viviparus gilli M. and H. 
Unio iridoides White *Lioplacodes veternus M. and H. 
Unio lapilloides White *Neritina nebrascensis M. and H. 
Unio stewardi White Metacypris forbesi Jones 
Unio nucalis M. and H Metacypris sp. 
Limnæa ativuncula White Darwinula leguminella Forbes 
Limnæa consortis White Cypris purbeckensis (Forbes) 
Limnæa ? accelerata White Cypris sp. 
Planorbis veternus M. and H.  
Unio felchii White Vorticifex stearnsii White 
Unio toxonotus White Valvata scabrida M. and H. 
Unio macropisthus White Viviparus gilli M. and H. 
Unio iridoides White *Lioplacodes veternus M. and H. 
Unio lapilloides White *Neritina nebrascensis M. and H. 
Unio stewardi White Metacypris forbesi Jones 
Unio nucalis M. and H Metacypris sp. 
Limnæa ativuncula White Darwinula leguminella Forbes 
Limnæa consortis White Cypris purbeckensis (Forbes) 
Limnæa ? accelerata White Cypris sp. 
Planorbis veternus M. and H.  

Of these, seven species are referred to Unio, three to Limnæa, one each to Planorbis, Vorticifex. Valrata, Viviparus, Lioplacodes, and Neritina and five are ostracod crustaceans. All are of fresh-water habitat. More than half of them come from a single locality near Cañon City, Colorado. The others are reported . . .

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