394 



TELEOSTEI 



usually large and simple, may also be lost (Salanx). The ovary is free, 

 the oviducts being short (Osmerus), or reduced to mere pores (p. 367). 



Salmo, L., Salmon and Trout (Fig. 385) ; Northern hemisphere ; 

 Pleistocene. Mallotus, Cuv. ; N. Asia and N. America ; Pleistocene. 

 Coreyonus, Art., Whitefish ; Osmerus, L., Smelt ; Thymallus, Cuv., Gray- 



FlO. 3b4. 



CoiUa ilumnnieri, C. and V. (After Day, Fishes of India.) 



ling Northern hemisphere. Argentina, Art. ; Europe. Salanx, Cuv. ; 

 China. Suciotrutta, Gthr. ; Caspian Sea, Russia, N. America. Opistho- 

 proctus, Peters (Fig. 401, A). 



Family ALEPOCEPHALIDAE. A family of deep-sea fish apparently 

 related to the last, but with neither adipose fin nor postclavicle. All 

 have lost the air-bladder ; Platytroctes the pelvic fins ; and some, like 

 Aleposaurus, have lost the scales. 



Alepocephalus, Risso; Bathytrodes, Gthr. ; Aleposomus, Gill; Leptoderma, 

 Vaill. ; Platytroctes, Gthr. 



Family STOMIATIDAE. Specialised deep-sea fish, with very delicate 

 scales or naked skin, and usually numerous well-developed phosphorescent 



FIG. 385. 

 Salmo salar, I.,. ; tlie Salmon. (From Seeley, freshwater Fishes of Europe.) 



organs. The maxilla is large and toothed ; the parietals meet in a 

 median suture (Chauliodus). The branchial opening is very wide, the 

 post-temporal being attached near the middle line. There is often a 

 hyoid barbel and an adipose fin. The air-bladder may be absent and the 

 paired fins reduced. In this one family Boulenger has united the 

 Stomiatidae and Sternoptychidae of Giinther. 



