i88 7 .] 
A Protandric Hermaphrodite. 
27 
When the spermatozoa become ripe, the envelope of the cap- 
sule probably bursts and the spermatozoa pass into the body cavity, 
which they leave through the abdominal pores. 
As to the details of the development of the spermatides into 
spermatozoa, I will give no circumstantial description here; my in- 
vestigations of that branch of the subject are not yet finished. 
From the little I have seen, I think, however, that it is evident, that 
the spermatozoon is formed from the nucleus as well as from the 
protoplasm of the spermatide, i. e. the whole spermatide is trans- 
formed into a spermatozoon. As to the tail; that is perhaps formed, 
partly by an elongation of the nucleus, partly by the protoplasm 
of the spermatide (vide fig. 16). 
As mentioned before, there is, so far as my experience goes, 
nothing in the spermatogenesis of Myxine which serves to indicate 
a development of the spermatozoa like what is supposed by Mr. 
CUNNINGHAM ; that which he has seen in his preparation I can not 
distinguish; is it possible that it is spermatozoa which have been 
artificially changed. 
As regards the structure of the anterior female portions of the 
reproductive organs (the ovaries); I have offered these no special 
attention, and would refer the reader to CUNNlNGHAMs paper 
and what I have before quoted from it; to which I have nothing 
to add. 
I will, however, before I conclude, mention, shortly, the re- 
productive organ of the »true« males, and of some specimens with 
mixed organs. 
As before stated, the reproductive organs of the males are 
more developed in their posterior than in their anterior portion. 
The posterior portion has a structure similar to that of the male 
organ of the hermaphrodite-male, to which it also corresponds. 
The anterior portion has, however, a somewhat different structure, 
it being much less developed. Fig. 8 is a transverse section of 
such a portion. The number of the testicular capsules is very 
small. I have not, yet, succeeded in finding spermatozoa in these 
capsules ; they contain, generally, small spherical cells somewhat sim- 
ilar to the spermatides of the common testes; whether those cells 
are ever developed into spermatozoa, I have not been able to eluc- 
idate. The connective tissue envelopes of the testicular capsules 
