Editorial note — APPENDIX V. PAPAL PHYSICIANS.

[Footnote 63: When the material of the famous Challenger expedition was being assigned for investigation to those who were expected to use it to the best advantage of science, the diatoms were handed over to the study of Francesco Castracane degli Anteminelli. He discovered in the material submitted to him three new genera of diatoms, 225 new species and some thirty varieties. Altogether he had written some 112 papers on the biology of his favorite microscopic plants. Castracane was a Catholic priest living at Rome in high favor with the ecclesiastical authorities and directly encouraged by the Pope in his work.]