File:PSM V84 D531 Facts and factors of development fig3-5.jpg
Fig. 3. Entire spermatozoon of the annelid nereis, showing perforatorium (P); head (H); middle piece (M), and tail (T). (From F. R. Lillie)
|Source||Edwin Grant Conklin: Facts and factors of development. The Popular science monthly, Volume 84, p527. New York, Popular Science Pub. Co., June 1914. Online: archive.org.|
|Author||Edwing Grant Conklin after F. R. Lillie|
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