118 THE SALMONIDM AND THYMALLIDJS—GILL. 



nines, there are in ThymaUus many (7-11) nubranched rays and the 

 rays in the posterior lialf are mostly simply bifid. The view generally 

 prevalent (that ThymaUus is intermediate between the Salmonines and 

 Coregonines, or that it is a member of the latter group), is thus nega- 

 tived by both the osteological peculiarities and external characteristics. 

 The family ThymaUida' is well distinguished. 



The diagnostic characters which separate the two families, Salmonidw 

 and ThymaUida', and the two subfamilies of the former are now jjre- 

 sented. The genera and their principal synonyms are also added. 

 The desirability of exhibits of exact references to the first introduc- 

 tion and uses of the various synonyms will be evident to those who 

 are conversant with recent works in which the genera have been 

 treated, and will show why the various names here used are employed. 



Fiimily Salmonidw. 



<^Dermopteres, Dumehil, Zool. Aualytique, p. 146, 1806. 



<C_Salmonidi, Kafinesque, lutlice d'lttiolog. Siciliana, ]). 32, 1810. 



<^'Dermopteria, Rafinesquk, Analyse de la Nature, p. 87, 1815. 



<^Sahnonoides, Risso, Hist. Nat. de rEurope Mcrid., t. 3. 



<C_Salmones, Cuvier, Eegne Animal [1'- ^d.], t. 2, p. 1.5!>, 1817; 2" M., t. 2, p. 



301, 1829. 

 <^Salmonides, Latreille, Fam. Nat. Regne Animal, p. 119, 182.5. 

 <^Salmones, Agassiz, Sel. Gen. et Sp. Piscium q. coll. Spix., p. 56, 1829. 

 <^Salmonacei, Nil.ssON, Prod. Ich. Scand., p. 1, 1832. 

 <lSalmonidfv, Bonaparte, Giorn. Accad. di Scieuze, v. 52 (Saggio Distrib. Metod. 



Animal. Vertebr. a Saugne Freddo, p. 37,) 1832. 

 <i^Salmonida', Swainsox, Nat. Hist, and Class. Nisbes, etc., v. 2, pp. 184, 283, 1839. 

 <^Salmonidw, Bonaparte, Nuovi Annali delle Sci. Nat., t. 2, p. 132, 1838; t. 4. p. 



272, 1840. 

 <^Sahnoncs, Muller, Arcbiv Naturgescb., 9. Jg., 1. B., p. 323, 1843. 

 <^Salmonoides, Valenciennes, Hist. Nat. des Poissons, t. 21, p. 1.53, 1848. 

 <^Sahnornd(v, Adams, Man. Nat. Hist., p. 109, 1854. 

 <^Sahnomdce, Richardson, Encycl. Brit., 8tb ed., v. 12, p. 245, 1856. 

 <^Salmonoidei, Bleeker, Enum. Sp. Piscium Arcbipel. Indico, p. xxxi, 1859. 

 <CSalmonidw, Gunther, Cat. Fisbes Brit. Mus., v. 6, p. 1, 1866. 

 <^Salmonidw, Cope, Proc. Am. Assoc. Adv. Science, 1871, p. 333, 1872. 

 <^Salmonidw, Gill, Arrang. Fam. Fisbes, p. 16, 1872. 

 <^Salmones, Fitzinger, Sitzungsber. K. Akad. der Wisseuscb. (Wien), B. 67, 1. 



Abtb., p. 37, 1873. 

 =Sahnoiiidxi>, Gill, Rep. Smitbs. Inst. 1884, p. 619, 1885. 



Diac/nosis. — Salmonoideans with a short dorsal fin of normal struc- 

 ture, epipleural appendages not develoj^ed, and parietal bones separated 

 at middle by the intervention of the supraoccipital which connects with 

 the froutals, and ripe ova first discharged within abdominal cavity. 



Subfamily SaljVKin in^e. 



<lTrui1tx {Triiiifuniu'n), Lati:killk, Vam. Nat. du R^gne Animal, \k 119 (tribe). 

 1825. 



