xlviii 



INTRODUCTION. 



form — that of rudimentary ova ; they constituted a consi- 

 derable mass^ which extended to the wall of the zooecium, 

 and became adherent to it (Woodcut, fig. xix.) ; the rest 



Fig. xix. 



Young Zooecium o/Farrella. 

 /. Funiculus, o. Mass of ova, extending to the cell-wall. «. Sperm-cells. 



of the funiculus was covered by the sperm-sacs. As these 

 gradually detached themselves, and the substance of the 

 testicle had become reduced in size, the adherent mass of 

 ova was found to be separated from it, and was left on 

 the face of the cell-wall. In this position only it has 

 been seen by those who describe it as developed on the 

 endocyst ; but it is really, like the testicle, derived in 

 the first instance from the endosarc. Upon this I would 

 merely remark that the explanation seems hardly to meet 

 the facts of the case, inasmuch as an adherent mass of 



