TY - JOUR T1 - On the Development of the Spinal Nerves in Elasmobranch Fishes JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 166 SP - 175 EP - 195 PY - 1876/01/01/ UR - http://dx.doi.org/10.1098/rstl.1876.0007 M3 - doi:10.1098/rstl.1876.0007 AU - Balfour, F. ER -