LAMELLIBRANCHIA TA. 



547 



ALPHABETICAL ARRANGEMENT— Continued. 



Modiomorpha Clarens, n. sp., 

 M. complanata. Hall, . 

 M. concentrica, Conrad, 



M. cymbula. Hall, . 



M. hyalea. Hall, 



M. linguiformia, Hall, 



M. macilenta. Hall, 



M. mytiloides, Conrad, , 



M. neglecta, Hall, 



M. ponderosa. Hall, 



M. putillus. Hall, 



M. quadrula, Hall, . 



M. recta, n. sp., . 



M. recurva. Hall, . 



H. regularis, n. sp., . 



M. rig^da, Hall, 



M. Schoharie, Hall, . 



M. subalata, Conrad, 



M. subalata, var. Chemungensis, n. 



M. sabangulata, n. sp., . 



M. Tioga, n. sp., 



Mytilarca, Hall. 1870. 

 M. attenuata. Hall, . 



M. carinata. Hall 



M. Chemungensis, Conrad, 



M. tibristriata. White and Whitfield, 



H. gibbosa, Hall, .... 



M. lata. Hall 



M. occidentalis, White and Whitfield, 



M. pyramidata. Hall, . 



M. regularis. Hall, .... 



M. simplex. Hall, ... 



M. umbonata. Hall, 



M. (Plethomytilus) arenacea. Hall, 



M. (Plethomytilus) Knappi, Hall, . 



M. (Plethomytilus) oviformis, Conrad 



H. (Plethomytilus) ponderosa. Hall, 



273 



272 

 275 



282 

 292 

 274 

 280 

 277 

 290 

 271 

 271 

 289 

 28G 

 288 

 270 

 287 

 269 

 283 

 284 

 287 

 291 



PLATE AND FIQURE. 

 XLI, fig. 4. 



XXXIV, fig. 14 ; XLI, fig. 3. 



XXXIV, figs. 9, 10 ; XXXV, figs. 1-5 ; XXXVI, figs. 1-lG, (17, 

 18?) 



XXXVI, figs. 19. 20. 

 XLI. tigs. 28-30. 

 XXXIV. tigs. (15?), 16, 17. 



XXXVII, tig. 17 ; XXXIX, figs. 17-21. 

 XXXVIL fig. 3 ; XXXVIII, figs. 1-16. 

 XLI, fig. 13. 



XXXIV, figs. 11, 12 ; XXXV, fig. 8. 

 XLI, figs. 1, 2. 



XLI, figs. 18-26. 



XXXV, fig. 9. 

 XLI, fig. 17. 

 XXXV, fig. 12. 

 XLI, figs. 14-16. 



XXXIV, tig. lA ; XXXV, fig. 14. 



XXXV, tigs. 6, 7 ; XXXIX, figs. 1-14, 16. 

 XLI. figs. 5, 6, 8, 9, 11, (7, 10 ?) ; XXXIX, fig. 15. 

 XXXV, figs. 10, 11. 



XL, fig. 18. 



260 XXXII, fig. 20. 



259 XXXII, figs. 15-19 ; XXXIII, fig. 8. 

 258 XXXII, figs. 8-11, 13, 14. 



264 XXXIII, figs 6, 7 ; LXXXVII, fig. 6. 



262 XXXIII, fig. 20 ; LXXXVII, tig. 7. 



262 XXXIII, fig. 22. 



263 XXXIII, tigs. 3-5 ; LXXXVII, fig. 11. 



256 LXXX, figs 1-3 



260 XXXII, fig. 12. 



261 XXXIIL figs. 19, 21. 



257 XXXII, tigs. 1-7. 



253 XXX, tig. 1 ; LXXXVII, fig. 10. 

 256 LXXXVII, fig. 13. 



255 XXXI, figs. 1-8 ; LXXXVII, fig. 8. 



254 XXX, figs. 2-7. 



Nucula, Lamarck. 1799. 



N. bellistriata, Conrad, 



N. corbulifoi-mis, . 



N. diffidens. n. sp., . 



N. globularis, n. sp., 



N. Houghtoni, Stevens, 



N. lamellata. Hall, . 



N. lirata, Conrad, 



N. Neda, Hall and Whitfield, 



N. niotica. Hall and Whitfield, 



N. Randalli, Hall, 



N. subelliptica. Hall, . 



N. umbonata. Hall, 



N. varicosa. Hall, 



Niiciilites, Conrad. 1S41. 

 N. cuneiformis, Conrad, 

 N. Nyssa, Hall, 

 N. oblongatus, Conrad, 

 N. triqueter, Conrad,. . 



318 XLVI, figs. 1-9. 



319 XLVI, figs. (10, 11 ?), 24-34, (35, 36, 37 ?). 

 322 XLV, figs. 12, 14. 



322 XCIII, fig. 6. 



323 XLV, figs. 29-31. 



320 LI, figs. 18-21 ; XLV, fig. 13 ; XCIII, fig. 7. 



316 XLV, figs. 5, 11, 15, 17-22, 24, 25 ; XCIU, fig. 5. 



314 XLV, figs. 3, 4. 

 313 XLV, figs. 1, 2. 



315 XLV, figs. 6-10, 16, 23, 26, 27 ; XCIII, figs. 1-3. 



317 XLV, fig. 28. 



321 XLVII, figs. 51, 52. 



319 XLVI, figs. 12-23 ; XCIII, fig. 4. 



325 XLVII, figs. 13-16. 

 328 XLVII, tigs. 29, 30. 

 324 XLVII, figs. 1-12. 



326 XLVII, tigs. 17-28 ; XCIII, figs. 8-10 



