TY - JOUR T1 - Observations upon Several Species of Small Water Insects of the Polypus Kind, Communicated in a Letter to the President, from Mr. Abraham Trembley F. R. S. JF - Philosophical Transactions (1683-1775) VL - 44 SP - 627 EP - 655 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1746.0115 M3 - doi:10.1098/rstl.1746.0115 AU - Trembley, A. ER -