ClipArt ETC
"Types of spermatozoa. A, from the round worm (Ascaris) with a cap, somewhat amaeboid; B, from the Crayfish, with numerous projections; C, from Frog; D, from Sea-urchin. h, head; m, middle piece; n, nucleus; t, tailor flagelium." — Galloway

Spermatozoa

"Types of spermatozoa. A, from the round worm (Ascaris) with a cap, somewhat amaeboid; B, from the Crayfish,…