668 



PISCES. 



(1852.) The means employed for this end are simple and beautiful. 

 About the middle of the oviduct of the female there is a thick glandular 



Fig. 327. 



Viscera of the Shark, in situ: a, the heart ; 6, gill- openings; c c c, lobes of the liver ; 

 d, e,f, A, alimentary canal; i, appendage to the intestine ; g, biliary duct; n, the testis; 

 o, p, vas deferens ; k, intromittent organ ; r, s, openings communicating with the peritoneal 

 cavity ; I, claspers. 



mass, destined to secrete a horny shell, in which the yelk and white of 



