PLATE XXIII. 



PAGE. 



DEJJTALIUM tfcLiuoiKNSE Worthen H5 



Fie. 1. View of a nearly perfect specimen, natural size. 



Mrp.< HISONIA EEOKUK Worlhen Hi 



fig. 2. Limestone cast of a nearly perfect specimen. 

 fig. 2 a. Fragment showing; the aperture. 



POLYPHEMOPSIS? KBOKUK Worthen '144 



fig. 3. Limestone cast of a specimen showing the aperture. 



POBCELIJA I-KOIUKN sis Worthen 138 



fig. 4. Profile view of dorsal side. 



Figs. 4 a and l>. Opposite views of a specimen, natural size. 



PLEUBOTOMABIA ADAMSI Worthen 137 



fig. 5. View of the spire, natural size. 

 Fig. 5 a. Same enlarged 2X. 



PLEUBOTOMABIA HJUNOIENSIS Worthen 135 



Figs. 6 and 6 a. Opposite views of same specimen, natural sizo. 

 Fig. 6 6. Profile view of the same. 



PLEUBOTOMABIA sp. undet. 

 Figs. 7 and 7 n. Dorsal view, natural eize, and magnified 2X. 



PLEUBOTOMABIA OIFFOBDI Worthen 135 



Fig. 8. View of spire showing aperture, natural size. 

 Fig. 8 u. Dorsal view of same. 



LOXONEMA QUADBI-CABINATUM Worthen 14 



Fig. 9. View of spire partially restored, and aperture, natural size. 

 Fig. 9 a. View of opposite side, natural size. 



LOXONEMA PEOBIENSE Worthen 13!i 



Figs. 10 and 10 a. View of spire, opposite sides, natural >i > 

 Fig. 10 h. Outline of the same enlarged 2X. 



TBACHYDOMIA NODULOSA Worthen 146 



FigB. 11 and 11 a. Opposite views of a peifect specimen, natural size. 



