PLATES VI & Yl\— Continued. 
47, 48. — Spermatozoa mature, resting on central blastophor {bl). 
49 , — Isolated blastophor with vacuole. 
50 . — Spermatozoa seen under 10 immersion objective, (?, mature ; 
(7, from polyplast, fig. 46. 
51 — 59. — Brown corpuscles of the seminal reservoirs exhibiting network, 
fresh. 
00 — 65. — Ditto with osmic acid and picrocarmine. 
06. — Similar brown corpuscle treated with acetic acid. 
67 — 71. — Younf brown corpuscle. 
72. — Sperm pohplast of Helix aspersa : bl. blastophor, spb. spermato- 
blasts. 
73. — Sperm pol 3 >last of Rena temporaria : bl. blastophor, spb. spermato- 
blasts. 
I 
