362 



TELEOSTEI 



surrounding the labyrinth of the ear (Mormyridae, Serranidae, 



Berycidae, Sparidae, Gadidae, Notopteridae ; Bridge and Haddon 



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



and pterotic bones and may 



touch the labyrinth (most Clu- 



peidae, Hyodontidae ; Ridewood 



[357]). The most complex 



arrangement is that found only 



in the Cypriniformes, as de- sv 



V5. 



Fio. 350. 



Alimentary canal and air-bladder of 

 Alosa vulgaris. (From Gegenbaur, Vcrgl. 

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

 ductus pneumaticus ; M, stomach ; Md, 

 intestine; Oe, oesophagus; K5, air- 

 bladder. 



FIG. 351. 



Diagram of the venous system of a Teleost, 

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

 caudal vein ; J.e, ductus Cuvieri ; h, heart ; 

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

 jugular vein ; fc, kidney ; I, liver ; p.c.v, 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 



