riiscEs. 105 



amongst the Malacopterygii. See the fifth part of the Natural-History 

 Transactions of the Royal Society at Copenhagen, 1832, s. LXXV. Lxxvi. 



Sudis Rafinesque, Bonap., Muell. (not Cuv.). Palate with a 

 senate carina, edentulous. Inferior teeth flat. 



Sp. Paralepis hyalinus Cuv., SvAis hyalina Rafin., Bonap. Faun. Ital. iii. 

 Tab. 124, fig. r ; the scales, with the exception of those of the lateral line, 

 readily fall off; the dorsal fin is placed in front of the ventral fin. The 

 palate would appear to have no teeth, but to be serrate. In the Mediter. 

 Sea. 



Familj XVII. Sahnonacet. Body scaly, with scales sometimes 

 deciduous. Second dorsal fin adipose. Superior margin of mouth 

 formed at the sides by the supramaxillary bones. Branchiostegous 

 membrane with 6 — 13 rays (mostly 10 — 12). Pseudobranchias 

 pectinate. Swimming-bladder simple. Ovaries without oviduct, 

 the ova falling from the ovaries into the cavity of abdomen. 



Argentina L. (in part). Teeth in tongue and vomer; in max- 

 illa3 none. Branchiostegous membrane with six rays. Scales 

 deciduous. 



Sp. Argentina sphynena L. (not Gronov.), Rondelet de Fiscib. mar. p. 227, 

 la petite spkyrene, Brunnich Ichthyol. Massiliensis, Hafnise, 1768, pp. 79, 

 80, GouAN Histor, Fisc. pp. 197, 198, Cuvier. Mem. du Miis. i. 1818, 

 pp. 228 — 236, PI. XI. fig. I ; in the Mediter. Sea; becomes only 8 or 10" 

 long; the stomach is dull-black; the swimming-bladder glistering and 

 silvery. Bkunnich first recognised the affinity of this fish with the 

 salmons. 



Sahno L. (exclusive of Gliaracini). Teeth in jaws, palate, 

 vomer and tongue in most, in some no teeth. Branchiostegous 

 membrane with 7 — 13 rays. Body scaly. 



A numerous genus of fishes, especi.iUy in northern Europe i. The follow- 

 ing sub-genera may be adopted. 



Coregonus Cuv. Teeth none. Branchiostegous membrane with 

 7 — 9 rays. Body elongate, with head acuminate. Scales moderate. 

 Caudal fin forked. 



Sp. Sahno oxyrhynchus L., Bloch Iclith. Tab. 25 (under the name of Salmo 

 Lavaretus), Cuv. et Val. Foiss. XXI. PI. 630. The head ends in a pointed 

 snout, prolonged in front of the mouth. This fish, called by the Dutch 



1 Compare Sir William Jardine Nat. Histoi~y and Illustrations of the Scottish 

 Salmonidce, folio, 184 1 and foil. 



