364 



TELEOSTEI 



The mesonephric kidneys, without coelomic funnels, are often 

 enlarged in front into a mass of lymphatic tissue developed in con- 

 nection with the larval pronephros (Balfour [29]) ; behind they 

 give off two mesonephric ducts which join together and open behind 

 the anus by a median pore. The sinus formed at their junction 

 may be produced into a mesoblastic urinary bladder, which, of course, 



B. 



mx 

 md . 



FIG. 353. 



Brain of Ksox lucivs. Dorsal view (A). Brain of Gadus rnorhun, dorsal view (B); ventral 

 view (C). 1, olfactory, 2, optic, 3, oculomotor, 4, pathetic, 5, trigeminal, 6, abducens, 7, 

 facial, 8, auditory, i>, glossopharyngeal, and 10, vagus nerve, ac, accessories, 6, buccal, h, 

 hyomaudibular, mil, mandibular, mx, maxillary, oph, superior ophthalmic, and r, dorsal 

 recurrent nerve branch ; r, cerebellum ; fb, forebrain ; l.i, lobus inferior ; m, myelencephalon ; 

 o.l, olfactory lobe ; op, optic lobe ; os, olfactory tract ; pt, pituitary body. 



is not homologous with that of the terrestrial vertebrates (Fig. 

 354). 



In Fierasfer and Zoarces (Emery [131]), and to a less extent 

 in Lepadogaster (Guitel [188]), the pronephros functions in the 

 adult. 



Never do the generative products of the male pass through the 

 kidney (p. 89). The elongated testes, which are shut off from 

 the abdominal coelom as in all other Gnathostomes, are directly 



