72 Miscellaneous. 
With regard to Brooks’s opinions, I have very strong reasons for 
believing that the genital or inferior cord of the stolon does not 
serve to give origin solely to the ova or female elements which are 
seen in the aggregated Salpa, but also to the spermatozoids ; if, 
therefore, we are to see in this cord a sexual gland, it will not be a 
female but an hermaphrodite gland. Hence it follows that the 
solitary Salpa is not a female but an hermaphrodite form. 
Moreover, Brooks is wrong in thinking that the ova with germi- 
nal vesicle and spot, which are observed already sketched out in the 
young buds, are true ova. In each bud of Salpa or Pyrosoma there 
exists at a certain moment a single one of these bodies; it is seen 
to divide several times before any fecundation. Only one of these 
segments becomes the definitive ovum; the others constitute a mass 
of cells already observed in the Salpe by Leuckart (who was not 
aware of its origin), and destined to form the proper walls of the 
oviduct and follicle. There is consequently no reason to be sur- 
prised, as has often been the case with reference to the Salpe and 
Pyrosomata, at seeing the ovum precede in development the indi- 
vidual which has to bear it; this body, which nevertheless in its 
dimensions and constitution presents all the characters of an ovum, 
is not a definitive ovum, but one of those bodies which the English 
call “ germinal cell” and the Germans “Ure,” and which it may be 
useful to designate in our language by the name of proovwm. 
To sum up. The gemmation of the Salpe is a true gemmation, 
but rendered particularly complex by the fact that organs already 
differentiated take part in it, each on its own behalf. 
The solitary form, hitherto regarded as agamic, is not a female ; 
it does not contain an ovary; nor does it contain an hermaphro- 
dite gland, but at the utmost the sketch or rudiment of such a 
gland; it therefore perhaps merits the denomination of an agamic 
form. 
To avoid all ambiguity it will be well to define the sense which 
should be attached to this term. 
The stock agamic form is that which, produced sexually and pos- 
sessing sexual tissue, either not yet differentiated andsimply in poten- 
tiality, or already differentiated and recognizable, but being incapable 
of conducting it to the term of its evolution, confides it for this pur- 
pose to one or more successive forms, the las. of which at least is 
sexual. 
This formula applies to the Salpe, to the Pyrosomata (in which 
the third bud alone is capable of reproduction), to the Doliola, to the 
compound Ascidia (which may present still more complex processes), 
and, lastly, to several other animal forms.— Comptes Rendus, June 4, 
1883, p. 1676. 
