518 



Zoological Society. 

 Table (continued). 



Name of Animal. 



Size of Tubes. 



State of Testes, &c. 



May 8, 



Feb. 28, 



May 4. 



May 22. 



Fringilla domestica, Linn. 



Fringilla Ccelebs, Linn. 



Emberiza Citrinella, Linn. 



Cuculus canorus, Linn. 



1-80 to 1-66 



■90 to 1-71 



•80 to 1-60 



MOO to 1-66 



Nov. 26 



May 31. 



Dec. 5. 



May 12. 



Picus minor, Linn. .... 

 Cypselus Apus, Flem. 



Columba Livia, Briss. 

 Sterna Hirundo, Linn. 



1-571 to 1-363 

 1-130 to 1-100 



•444 to 1-285 



1-240 to 1-200 



1000th of an inch in 

 diameter ; great abun 

 dance of molecules; no 

 perfect spermatozoa. 



Testis one-third of an 

 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- 

 2666th of an inch long 

 and l-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 resembling, 

 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. 



