TY - JOUR T1 - On the Nature and Formation of Sponges: In a Letter from John Ellis, Esquire, F. R. S. to Dr. Solander, F. R. S. JF - Philosophical Transactions (1683-1775) VL - 55 SP - 280 EP - 289 PY - 1765/01/01/ UR - http://dx.doi.org/10.1098/rstl.1765.0032 M3 - doi:10.1098/rstl.1765.0032 AU - Ellis, J. ER -