PROCEEDINGS OF THE NATIONAL MUSEUM. 121 



'yCoregonus, Agassiz, Lake Superior, p. 336, 1850. 

 '^Argyrosomus, Agassiz, Lake Superior, p. 336, 1848. 



Coi-ef/onns, Guxther, Cat. Fishes in Brit. Mus., v. 6, p. 172, 1866. 

 ^Prosoinnm, (Milnkr) .Jordan, Man. Vertebr. N. U. S. 2. ed., p. 38L 187S, 

 ^Allosoni'i.s, .Jordan, Man. Vertelir. N. I^. S. 2. ed., i>. 361, 1878, (subj;-. i)t' Arfiy- 



roKomiis). 

 Snhiio 8p., a lift. vet. 



Subfamily Stenod ontin^. 



Salnioiiids, with a deeply-cleft mouth, long lower jaw, articulating 

 with the quadrates beliind the eye.s, broad sui)rii-iniixillaries with 

 convex adoral inarginSj and bands of teeth on the broad head of vomer 

 and oil the palatines. 



Ocinis S T E NODUS. 



^=Steno(lus, Richardson, Narrative, Artie Land Exp., p. 521, 18.36. 

 ^Stenodns, Richardson, I'.ncycl. Brit., 8. ed., v. 12, p. 245, 1856. 

 r= lAiciotruita, Giinther, Cat. Fishes B. M., v. 6, p. 164, 1866. 

 Salmo Kp., Richardson olim. 



The genus Stenodii.<i was originally proposed by Dr. (afterwards Sir 

 John) Richardson in an appendix to Back's "Narrative of the Arctic 

 Land Expedition to the Mouth of the Great Fish IMver," etc., pub- 

 lished in 1830. In his remarks on the "Fish," allusion is made (j). 521) 

 to "the Salmo MacJcenzii, which ascends from the Arctic Sea, and does 

 not exist in the more southern waters. This fish [he continued], though 

 agreeing with the fronts in the structure of the jaws, differs from all 

 the subgenera established by Cuvier in the Begne An'vmal in having 

 .the teeth disposed in velvet-like bands, and broader on the vomer and 

 IJalatine bones. From the crowded minute teeth, the name of Stenodns 

 may be given to the subgenus, of which the inconnu, or Salmo Mac 

 lenzii, is the only ascertained species." In 185C an elaborate descrip- 

 tion of the genus was published by the same author. The name Lucio- 

 trntta was proposed for the same type thirty years after Stenodvs by 

 Dr. Giinther, who was apparently unacquainted with Kichardson's 

 propositions. 



Family THYMALLID^E. 



= Core(jomda', Cope, Proc. Am. Assoc. Adv. Science, 1871, p. 333, 1872. (Diagno- 

 sis only.) 

 = T]ujmaUi(la', Gill, Rep. Smithson. In.st., 1884, p. 619. 1885. 

 = Thymallidcv, Cope, Syl. Lect. Geol. PaL, p. 23, 1891. 

 Salinovidw gen., Auct. pi. 



jyiagnoaifi. — Salmonoideans with a rather long dorsal fin whose ante- 

 rior half is composed of graduated simple rays and posterior half of 

 bifurcate or little branched rays, epipleural spines to anterior ribs, the 

 parietal bones meeting at middle and excluding frontals from supra- 

 occipital, and ripe ova first discharged within abdominal cavity. 



