Bkede.] Carboniferous Invertebrates. 187 



PLATE XXII. 



Schizodus wheeleri, (p. 155.) 



1. Dorsal view of cast. (After Keyes.) 

 16, Side view of specimen with shell on. 

 lc. Side view of No. 1. 



Schizodus hart, (p. 155.) 



2. End view of specimen. Natural size. 

 26. Left hinge. 



2r>. External view of right valve. 

 2d. Iuternal view of same. 

 Edmondia aspenwallensis, (p. 166.) 



3. Lateral view of right valve, i After Keyes. 

 36. Dorsal aspect of same. 



Solenomya radiata, p. 160.) 



5. Lateral view of specimen, i After Meek and Hayden.) 

 ob. Dorsal view of same. 



Schizodus compressus Rogers. N. sp., I p. 157. i 



6. Internal apparatus of a worn right valve. 

 66. Same of left valve. 



6c. Outline showing convexity of shell. 



6^/. Outer appearance of better specimen. All natural size. 



Nuculana bellistriata attenuate/,, (p. 149.) 



7. Lateral view. Enlarged. 



76. Surface markings. Enlarged. 

 Nucula beyrichi, i p. 149.) 



8. Side view of specimen, i After Meek.) 



Nucula ventricosa, ip. 150.) 



9. Cast showing adductors and pallial line. Natural size. 

 96. External appearance of shell. 



Astartella vera, (p. 163.) 



10. View of right valve of specimen. 



CORRECTIONS. 



Page 18: Following Lophophyllum westi, after fig. 12, add ''plate V, fig. 7."' 



Page 21: Following Cladochonust hi nnt tti, after fig. 1, erase "plate V, fig. 7.'* 



Page 43: After Hydreionocrinus sUbsivuatus, instead of "Plate VII, fig. 14." 

 read ••Plate VIII, fig. 14." 



Page 78: Following Productus semirecticulatus, after figs. 2-2d, instead of 

 ••text fig. 2, f." read "text fig. 3, f." 



Page 103: Following Hustedia mormoni, for "plate X. fig. ."J/' read "plate 

 XII. fig. :i." 



149: After Nuculana U llisiriata atte nuata, add -Plate XXII. figs. 7,7b." 



