References
- Amer. Journ. Conch. , iv 167 – 167 .
- See Ann. Nat. Hist. 1871 for Jan. and Feb.
- Published in the American Journal of Science 1868 Sept
- There are palæontological reasons for believing Proc. Acad. Nat. Sc. Philad. 1868 313 313 that the Caribbean continent was not submerged before the close of the Postpliocene.