PIRATE VII. 



Page. 

 fECTEN VENUSTUS Mortou 4r) 



Fig. 1. View of a cast of a right valve enlarged to two diameters. 



•2. Enlarged view of a right valve, preserving the .shell, from Freehold, N. J. 

 :;. View of a left valve. The curved lines iodii-atc (he degree of convexity. 

 4. Enlarged view of the hinge of the specimen. Fig. ;i. 



PECTEN TENUITESTUS Gabb 4 



Fig. ^. View of a left valve, the shell preserved. 



6 View of another left valve, showing a difteront di grei' of oinamcntation. 



Pecten (Syncvclovkjia?) perlamellosus Whillicld 50 



Fig. 7. View of the specimen descril^ed, natural size. 



Amusium Co.vradi Whitfield 50 



Fig. 8. View, enlarged, of a left valve showing indistinct radii. 



9. Enlarged view of a right valve showing the concentric lines. 



10. Enlargement of the concentric lining of the right valve. 



Amusium simpi.icu.m Conrad .-.j 



Figs. 11 and Id. Enlarged views of specimens of this species from Eufaula, Ala., the typical 

 locality of the species. The lines between these iignres show the convexity. 



Pecten quivqoenarius Conrad 47 



Fig. 13. View of a small right valve from the limestone nodnles at Marlljorough, X. J. 

 14 and 15. Impressions in fine micaceous clay, from Freehold. 

 16. Enlargement of (hi' surface from Fig. 14. 



Pecten (Chlamys) craticui.i s Morton 49 



Figs. 17 and 18. Views of Dr. Morton's type, the largest fragment I have seen of the spe- 

 cies. 



282 



