EXPLANATION OF PLATE IV. 



DISCORBINA BERTHEivOTi (d'Orbigny), p. 256 



13. Upper, lower and peripheral views of a recent individual, 

 (x45). (After Challenger Report.) 



TRUNCATUUNA AKNERIANA (d'Orbigny), p. 257 



4-6. Peripheral, lower and upper views of a recent individual, 

 (x22j4). (After Challenger Report.) 



TRUNCATUUNA HAIDINGERII (d'Orbigny), p. 257 



7-9. Lower, upper and peripheral views of a recent individual, 

 (xi5). (After Challenger Report.) 



TRUNCATUUNA LOBATULA (Walker and Jacob), p. 258 



10-12. Peripheral, lower and upper views of a recent individual, 

 (x3o). (After Challenger Report.) 



TRUNCATUUNA REFUIXJENS (Montfort), p.- 259 



13-15. Upper, lower and peripheral views of a recent individual, 

 (x3o). (After Challenger Report.) 



TRUNCATUUNA UNGERIANA (d'Orbigny), p. 260 



16-18. Upper, lower and peripheral views of a recent individual, 

 (xi7j). (After Challenger Report.) 



TRUNCATUUNA WUELLERSTORFI (Schwager), p. 261 



19-21. Upper, lower and peripheral views of a recent individual, 

 (x25). (After Challenger Report.) 



ANOMAUNA GROSSERUGOSA (Gumbel), p. 262 



22. Lower lateral view, (x43). (After Bagg.) 



Cretaceous, New Jersey. 



23-25. Upper, peripheral and under views of a recent individual, 

 (x22j4). (After Challenger Report.) 



ANOMAUNA AMMONOIDES (Reuss) , ." p. 261 



26. Lower lateral view, (x35). (After Bagg.) 



Cretaceous, New Jersey. 



27-29. Upper, lower and peripheral views of a recent individual, 

 (x45). (After Challenger Report.) 



PutVINUUNA KARSTENI (ReUSS), p. 263 



30-32. Upper, peripheral and lower views of a recent individual, 

 (x25). (After Challenger Report.) 



PULVINUUNA RETICULATA Reuss var. CARINATA Bagg, p. 265 



33-34. Lower and upper views, (x26^). (After Bagg.) 

 Navesink marl, Freehold. 



