272 



ENTOZOA. 



modified scolices, in whicli case it is obvious that they must com- 

 mence by a process of budding from the endocyst, as, in point of 

 fact, Naumyn states they do. It does not seem probable that the 

 secondary and tertiary hydatids should arise from independent 

 granular points within the laminse of the non-vital ectocyst. For 

 the acceptance of my view it is not even necessary to perceive a 

 thorough scoleciform character in the primary buddings destined 

 to become daughter vesicles ; it is sufiicient if the original process 

 of differentiation clearly resembles the papilliform commencement 

 of the ordinary scolex head. Lastly, these views, suggested by the 

 description of several authors (more particularly by those of Huxley, 



Fia. 61.— Portion of a ruptured brood-capsule, showing Echinococcus scolices somewhat flattened 

 by pressure ; from a Lemur (x 130 diam.) — Original. 



Leuckart, and Naumyn), will likewise hold good in every case, 

 whether we have to deal with the compound exogenous, endoge- 

 nous, or multilocular hydatid growths. 



In concluding tliis division of my subject, may I not congratu- 

 late physiologists upon the highly satisfactory position at which 

 helminthologists have now arrived in regard to one of the most 

 intricate and interesting questions which the subject of parasitology 

 has evolved ? It would please me well if I could here lay aside my 

 pen, but I have yet to consider the echinococcus hydatids from a 

 more purely practical and professional point of view. 



