96 Process of Reproduction, &c. 



indeed, singular, that the red vessels should be the instrument of 

 every new production of parts, which in their natural state do not 

 possess red vessels, and which disappear whenever the growth is 

 completed. 



Soon after this substance is formed by the capillary arteries, it 

 is covered by a thin transparent temporary film or pellicle. The 

 formation of this pellicle is almost simultaneous with another 

 change, its penetration by blood vessels. I hesitate in stating 

 this fact by a*passive expression, for I regard the lymph as an 

 active agent in the formation of the vessels. Immediately after 

 the new growth has become vascular the process of organization 

 commences, and the red vessels almost entirely disappear, unless 

 when another growth is to take place where the red vascular spot 

 is observed at the extremity as usual. May we hence conclude, 

 that the new growths take place from the red vessels, and that 

 organization is effected by the colourless ones ? 



The reproduction of the members of the salamander is so justly 

 associated with the name of Spallanzani, who first observed and 

 published this extraordinary fact, it may fairly excite surprise, 

 that more present mention is not made of that observing natu- 

 ralist in the preceding pages ; but although desirous of confining 

 myself strictly to my own personal observations, never having 

 been able to procure his prodromo, I have been prevented availing 

 myself of his experience and authority. 



Naples, February 28, 1823. 



