1879.] NATURAL SCIENCES OF PHILADELPHIA. 43 



DESCRIPTIONS OF THREE NEW SPECIES OF CALCEOLIDJE FROM THE 

 UPPER SILURIAN ROCKS OF KENTUCKY. 



BY VICTOR W. LYON. 



For several years past there have been found in the ferruginous 

 clay and light-gray marly limestone of the Niagara period, which 

 outcrops at the quarries in Jefferson County, Kentucky, on Bear- 

 grass Creek, one mile east of Louisville, many fossils, which have 

 been considered by some collectors to be a species of coral allied 

 to Zaphrentis. 



Until November 25th, 1877, all the specimens which I found 

 were in such a state of preservation that they could not be de- 

 termined. 



Since my attention has been called particularly to these speci- 

 mens, I have collected one hundred and seventy well-preserved 

 fossils, which I regard as true Galceolse. There are four distinct 

 species, of which three are new. 



In the same bed, associated with these new forms of Calceola, 

 are found Calceola Tennesseensis (Roemer) ; Orthis elegantula, 

 0. hybrida, 0. nisfs, 0. rugse, plicata ; Spirifer radiala, S. cris- 

 jms, S. rostellum ; Pentamerus nysius, P. Littoni, P. Knappi, P. 

 nucleus; Rhynchonella Sajfordi, R. Tennesseensis, P. neglecta ; 

 Cyrtia exporrecta ; Caryocrinus ornatus ; Eucalyptocrinus cssla- 

 tus, E. crassus ; Haplocrinus ovalis, etc. The new species refer- 

 red to are as follows : 



Genus CALCEOLA, Lamarck, 1801. 

 Calceola corniculum, V. W. Lyon, n. sp. 



Shell thin ; valves not articulated ; ventral valve horn-shaped ; 

 area high and narrow, greatly curved to the left, flat, one inch 

 along the shorter curve, from apex to hinge ; hinge straight, four- 

 tenths inch long, at an obtuse angle to the apex. 



Draw a line from the centre of the hinge perpendicularly, and 

 it will cut the longer curve of the area midway between apex and 

 hinge. 1 



1 I have before me two very perfect ventral valves of 0. Tennesseensis, 

 from Decatur County, Teun., Upper Silurian. Shell triangular pyramidal, 

 area one inch from apex to hinge ; hinge line one inch wide. 



If a line be drawn from cardinal process to apex, it will divide the shell 



