PLATE IX— Contiiined. 



Crenipecten amplus. 



Page 81. 

 Kif."-. !•. A li't't valvi- slmwiiiy tin- cjirtilag-e jiits aUniff the hiiifff. Tin- iKisteridi- eai- as rcpreseiiteil is too 



loiifT. frivirifr till" fig'iire the aspec^t of the right valve. 

 Fij,'. ly. A lai'tre left valve. The tig-iire should be exteiuli'ii fully 3 mm. on the postenor side to correspond 



with the sjiecimeii. 

 Fife', l."*. An imperfect specimen, somewhat dislcn-ted tVum pressuie, and referi-ed tn this species with some 

 doiil)t. 



• 'hfiniiiiy frronp. MockvUle, jy. Y. 



LVRIOPECTEN FASCIATUS. 



Page 65. 

 Fi{r. 10. An imperfect left \ alve. 



Fig. 11. An enlargement of a portion of the sui-face showing the fasciculate radii and concentric striae. 

 Chemung group. Leon, Cattwaiigjis Co., N. Y. 



Crenipecten Leon. 



Page 88. 

 Si'e Plate S3. 

 Fig. \2. \ left valve of this .s])ecies. .Vnother figure of this specimen is given on plate .n3 shnwirig mere 

 correctly the chara<:ters of the hinge and the form of the valve. 

 Cheuumg group. Leon, Cattaraugus Co.. N. Y. 



Crenipecten impolitus. 



Pace Si. 

 See Plate 83. 

 Fig. 14. A large left valve showing the form and pi'oportions of this species. The .spccinicji preseivcs 

 traces of distant ra<liating lines which are not represented in the tigui'e. 

 t'hemung group. Olean, N. Y. 



Crenipecten obsoletus. 



Page 84. 

 Figs. Kt, 21. Tjcft and right vahes. Fig. 21 is from the original specimen of the s])ecies. 

 Chemung group. PhiTtpshiirg. N. Y. 



Crenipecten glabek. 



P.ige 85. 

 Fig. 20. A view of the original .specimen of fig. 10, p. 264, Geolog. Rept. Fourth Dist. N. y. 1S43. 

 FMg. 22. A larger specimen referred with some doubt to this specimen. 

 Chemung group. Alleghany Co., N. Y. 



Crenipecten micropterus. 



Pago 88. 

 Fig. 23. .\ right valve .showing the foriu and surface characters. 

 Chemung group. P/iilipshurr/, iV. Y. 



Crenipecten liratcs. 



Page 87. 

 See Plate 83. 

 Fig. 24. A left valve. Another figure of this specimen is given on plate S3, to show the size of the eai"s as 

 preserved in the specimen. 



Chemung group. East Randolph, N. Y. 



