702 



NORTH AMERICAN INDEX FOSSILS. 



551. 



Protocardia subquadrata, M, d 



338. 



553- 



Isocardia cliffwoodensis, M, a, c 



339. 



*S56. 



Cyprimeria crassa, L, c 



340. 



557. 



C. excavata, M, a, b 



341. 



560. 



Meretrix tippana, M, a, b, c 



352. 



561. 



M. eufaulensis, M, a, b 



370. 



562. 



M. veta, U, a 



371. 



♦563. 



M. ripleyana, M, a 



374. 



567. 



Dosiniopsis deweyi, M, d 



''376. 



568. 



D. owenana, M, d 



384. 



569. 



D. nebrascensis, M, d 



385. 



*57i. 



Tapes hilgardi, L, c 



386. 



572. 



Tellina equilateralis, M, d 



387. 



576. 



Linearia metastriata, M, a, b 



388. 



577. 



^nona eufaulensis, M, a, b, c 



389. 



581. 



Siliqua huerfanensis, L, d 



390. 



583. 



Leptosolen biplicatus, M, a, b 



392. 



584. 



Solyma lineolata, M, a, b 



396. 



585. 



Legumen planulatum, M, a, b, d 



397. 



587. 



Cymbophora ashburneri, L, e 



400. 



588. 



C. utahensis, L, d 



401. 



589. 



C. alta, M, d 



403- 



590. 



C. lintea, M, a, b 



404. 



591. 



C. emmonsi, L, d 



405- 



592. 



C. warrenana, M, d 



406. 



593. 



Schizodesma appressum, M, a,b, c 



407. 



594. 



Corbula pyriformis, L, d 



408. 



595. 



C. engelmanni, L, d 



413- 



596. 



C. subtrigonalis, X, d 



414. 



597. 



C. bisulcata, M, a, b 



415. 



598. 



C. crassiplica, M, a, b, c 



416. 



604. 



Panopea decisa, M, a, b 



417. 



605. 



Turnus kummeli, M, a, c 



421. 



606. 



Teredo irregularis, M, a, b 



422. 



607. 



Polorthus tibialis, TJ, a 



423. 

 424. 





SCAPHOPODA. 



425. 



2. Dentalium pauperculum, M, d 



443. 



3. D. 



gracile, M, d 



444. 



4. D. 



stramineum, e 



446. 



5. D. 



cooperi, e 



449. 



6. D. 



subarcuatum, M, a, b 



450. 



7 D. 



nanaimoense, li, e 



453. 

 454. 





Gastropoda. 



455. 



327- 



Margarita ornatissima, L, e 



456. 



32S. 



M. abyssina, M, a 



457. 



333- 



Neritopsis biangulata, L, c 



458. 



336. 



Nerita naticiformis, L, d 



459. 



337. 



N. crebrilineata, U, d 



460. 



N. pisum, L, d 



Velatella patelliforniis, L, d 



V. carditoides, L, d 



V. baptista, TJ, d 



Scalaria sillmani, M, a, b 



Vanikoropsis suciensis, L, e 



V. tuomeyana, M, d 



Natica halli, M, a, b 



N. shumardiana, L, e 



Gyrodes depressa, L, d 



G. conradi, L, d 



G. crenata, M, a, b 



G. abyssina, M, a, b, c 



G. petrosa, M, a, b, c 



G. conradiana, L, e 



G. expansa, L, e 



Amauropsis bulbiformis, L, d 



Xenophora leprosa, M, a, b 



X. umbilicata, M, a, b 



Valvata nana, L, d 



V. subumbilicata, TJ, d 



Viviparus couesii, L, d 



V. conradi, M, d 



V. leai, U, d 



V. leidyi, TJ, d 



V. plicapressus, TJ, d 



V. prudentia, TJ, d 



Campeloma macrospira, L, d" 



C. vetulum, M, d 



C. multilineatum, TJ, d 



C. multistriatum, TJ, d 



C. productum, TJ, d 



Turritella whitii, L, d 



T. vertebroides, M, a, b 



T. encrinoides, M, a, b 



T. trilira, M, a, b, c 



T. tippana, M, a, b 



Laxispira lumbricalis, M, a, 1> 



Siliquaria pauperata, M, a 



Glauconia coalvillensis, L, d 



Melania insculpata, TJ, d 



M. wyomingensis, TJ, d 



Melanopsis americana, TJ, d 



Pyrgulifera humerosa, L, d 



Goniobasis chrysallis, L, d 



G. chrysalloidea, L, d 



G. cleburni, L, d 



G. convexa, TJ, d 



G. endlichi, L, d 



G. gracilenta, TJ, d 



