PLATE XLVI 



PAGE 



Figs. 1, 2. CLADOCHONUS HUMIIJS n. sp 542 



1. Corallum, natural size. Hancock-Harrisonville Road, 2 miles north 



of Hancock, 725. 



2. Cast of interior of corallite, showing imprints of spinules. X 5. 



National Road, east of Hancock, 690. 



Jennings formation, Woodmont member, Ithaca fauna. 



Figs. 3, 4. PALEASTER CLARKI n. sp 543 



3. Ambulacral surface, showing the character of the thecal plates, 



and some of the adambulacral plates. The mouth parts are not 

 clearly retained. X 1%. 



4. Abactinal surface, showing the character of the three rows of plates 



on the arms, the fine intercalary plates of the median row and 

 the large and mammillated body plates. X 1%. 

 Jennings formation, Chemung member, near Oakland. 



Fig. 5. SPIRORBIS GYRUS n. sp 544 



An attached tube, showing the tubercled surface. X 5. Jennings 

 formation, Chemung member ?, Sideling Hill Creek, Allegany 

 County. 



Fig. 6. PTERIDICHNITES BISERIATUS n. sp 545 



Track made by animal. Jennings formation, Woodmont member, 

 Naples fauna, Woodmont. 



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