TY - JOUR T1 - Notes on the Impregnation of the Ovum in the Amphibia: In a Letter to Thomas Bell, Esq., Sec. R.S JF - Abstracts of the Papers Communicated to the Royal Society of London (1843-1854) VL - 6 SP - 171 EP - 172 PY - 1850/01/01/ UR - http://dx.doi.org/10.1098/rspl.1850.0063 M3 - doi:10.1098/rspl.1850.0063 AU - Newport, G. ER -