JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE XXIV, 



Illustrating Mr. Gibbes' Memoir on the " Structure of the 

 Vertebrate Spermatozoon. '^ 



Fig, 1.— aS*. macidata. Fresh. Drawn with Powell and Lealand's 



j^ imm. X 950. 

 Fig. 2. — S. macidata. Fresh. Drawn with Powell and Lealand's i 



new formula imm. ; upper part of filament was in motion at the time. 

 Fig. 3. — Triton cristatiis. Prepared in 5 per cent, chronic ammonium, 



and mounted in glycerin. Drawn with Ziess' F. 

 Fig. 4.— Spermatozoon of horse, fresh mounted in glycerin. Drawn 



with Powell and Laland's -^-^ immersion. X 950. 

 Fig. 5. — Spermatozoon of guiuea-pig, fresh mounted in glycerin. Drawn 



with j5^ immersion, x 950. 

 Fig. 6. — Spermatozoon of Salamandra maculata, mounted in a solution 



of chloride of sodium h, percent., and drawn, after having been mounted 



forty-eight hours, with Zeiss' F. 

 Fig. 7. — Spermatozoon of Triton cristatus, taken fresh and mounted in 



5 per cent, solution of chloride of sodium, and drawn with Powell and 



Lealand's y\^ dry, after being mounted four weeks. 

 Figs. 8 and 9. — Spermatozoon of S. maculata, taken fresh and mounted 



in \ per cent, salt solution. Drawn with Powell and Lealand's ^ immer- 

 sion. In Fig. 8 the head and membrane have altogether disappeared, 



while in Fig. 9 they are scarcely touched. 

 Fig. 10. — Spermatozoon of S. maculata after immersion in a 5 per cent, 



solution of Sodae Bicarb, for forty-eight hours. Drawn with J^ of 



immersion. 



