518 



Zoological Society. 

 Table (continued). 





Date. Name of Animal. 



May .3 



May 4. 



May 22. 



Nov. 2G. 

 May 31. 



Dec. 5. 



May 12. 



Fringilla dome.stica, Linv. 



Fringilla Coelebs, Linn. ,. 



Emberiza Citrinella, Linn. 



Cuculus canorus, Linn. 



icus minor, ijinn. 



Cypselus Ap>is, Firm. 



Columba Livia, Briss. 



.Sterna Hirundo, Linn. 



1-80 to l-fie 



1-90 to 1-71 



1-100 to 1-CG 



1-571 to 1-3C3 



1-130 to 1-100 



1-240 to 1-200 



State of Testes, &c. 



1000th of an inch in 

 diameter ; great abun- 

 dance of molecules; no 

 perfect spermatozoa. 



Testis one-third of ai 

 inch long and one 

 fourth broad ; sperma 

 tozoa plentiful ; mole 

 cules not abundant. 



Testis one-tenth of an 

 inch in diameter ; nu 

 merous cells contain 

 ing rudimentary sper- 

 matozoa, but none per- 

 fect ; molecules very 

 numerous. 



Testis one-third of an 

 inch long and one- 

 fourth broad, contain 

 ing a little yellow pig- 

 ment ; spermatozoa 

 very numerous; mole- 

 cules not abundant. 



Testis one-fifth of an inch 

 in diameter, of an in- 

 tense yellow colour ; 

 numerous staff-like 

 bodies in semen 1- 

 26G6thofan inch long 

 and 1-25, 000th broad. 

 Died in confinement. 



Testis size of a rape- 

 seed ; no spermatozoa 

 or molecules. 



Testis one-third of an 

 inch long and one- fifth 

 broad ; spermatozoa 

 numerous ; molecules 

 scanty. 



Testis about as big as a 

 hemp-seed ; no sper- 

 matozoa ; a few mole- 

 cules. 



Testis one-tenth of an 

 inch in diameter; no 

 spermatozoa ; mole- 

 cules plentiful. 



Molecules of the Semen. — The molecules mentioned in the prece- 

 ding table are minute, smooth, circular particles, much x'esembling, 

 both in chemical and physical characters, the " minute oil-like 

 spherules" which I have depicted in the juice of the supra-renal 

 bodies (Appendix to Gerber's Anatomy, p. 103). The " minute shi- 

 ning globules and smaller molecules," described by Professor R. 



