362 



TELEOSTEI 



surrounding the labyrinth of the ear (Mormyridae, Serranidae, 

 Berycidae, Sparidae, Gadidae, Notopteridae ; Bridge and Haddon 

 [58]). The diverticulum in other genera may penetrate the prootic 

 and pterotic bones and may 

 touch the labyrinth (most Clu- 

 peidae, Hyodontidae ; Kidewood 

 [357]). The most complex 

 arrangement is that found only 

 in the Cypriniformes, as de- 



c. 



Oe 



[>CV: 



V5. 



FIG. 350. 



Alimentary canal and air-bladder of 

 Alosa mdgar'ix. (From Gegenbaur, Vergl. 

 Anat.) A.p, pyloric appendages ; tl.p, 

 ductus pneumaticus ; AI, stomach ; Mil, 

 intestine ; Oe, oesophagus ; V5, air- 

 bladder. 



FIG. 351. 



Diagram of the venous system of a Teleost, 

 ventral view, c, superior .jugular vein ; c.v, 

 caudal vein ; d.c, ductus Cuvieri ; h, heart ; 

 h.v, hepatic vein ; i, intestine ; j, inferior 

 jugular vein ; fc, kidney ; I, liver ; p.c.r, pos- 

 terior cardinal vein ; p.v, portal vein ; r.p, 

 renal portal vein ; so.v, somatic vein ; sp, 

 spermatic vein ; s.v, subclavian vein ; v, vein 

 uniting caudal with portal (not always 

 present) ; v.b, vein from air-bladder. 



scribed below (p. 373). Often the air-bladder is lost (among 

 the Scopelidae, Symbranchiidae, Pleuronectidae, Lophiidae, etc.). 



The spiral valve of the intestine has disappeared in all living 

 Teleosts except Chirocentrus (Cuvier and Valenciennes [95] (Fig. 

 77, A)). Vestiges of it may perhaps remain in some Salmonidae 



