66 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
uterine vesicles are but separate chambers of a compound organ, is the simul- 
taneous occurrence in these chambers of both ova and spermatozoa. Figure 
10 represents a section through one of the uterine vesicles, showing an ovum 
surrounded by a dense mass of filaments, which in every way resemble the 
spermatozoa found in the seminal vesicles of the same specimen. Lang (op. cit., 
p- 297) speaks of skeins of fine filaments resembling spermatozoa in the acces- 
sory vesicles, and of “lumps” which he doubted not were fragments of eggs 
that had found their way in there, 
