362 



TELEOSTEI 



surrounding the labyrinth of the ear (Mormyriclae, 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 ; Bidewood 

 [357]). The most complex 

 arrangement is that found only 

 in the Cypriniformes, as de- 



Ap- pCV.-- 



Fio. 350. 



Alimentary canal and air-bladder of 

 Alosa vulgaris. (From Gegenbaur, Vergl. 

 Aunt.) A.p, pyloric appendages; d.p, 

 ductus pneumaticus; M, stomach ; Md, 

 intestine; Oe, oesophagus; ('."., air- 

 bladder. 



Fig. 351. 



Diagram of the venous system of a Teleost, 

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

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

 //./•, hepatic vein; i, intestine ; j, inferior 

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

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

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

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



