Jonian and F.vtrntann. — Fislics of JVorih America. 



h. Infrani\al laiuina witli 7 cusps ; dorsals wholly soparato. auuea, 12. 



iih. Intraoral lamina with 8 or 'J cusps. 



f. Lateral tuoth usually 4 on each side, all hicusp'id ; dorsals separate. 



SI'AI)ICE.\, i:}. 

 (!■. Lateral teeth usually 3 on each side of disk, the middle one tricuspid, tlie others 

 hicuspid ; dorsals slightly connected. cirakia, 1-1. 



(i((. Dorsal tins distinctly united, with a sharp notch ; lateral teeth usually li, bicuspid. 



WILIiKItl, If). 



l'». LAMPKTRA AUREA, (Dean). 



Dorsal fins separate, the first \ the height of the second, tlie inter- 

 space f the length of the first; intraoral lamina with 7 cusps, the outer 

 largest; head shorter than thorax, 104^ in length. Plumbeous, golden 

 below. (Bean.) Yukon Eiver and streams of Alaska and Kamchatka. L. 

 about a foot. Very close to the Ffur ojpeaii L. fluviatilis. (awreMs, golden.) 



Ammoaetes aureus, Bean, Proc. U. S. Nat. Mus., 1881, 159, Yukon River; (Type, No. 21.524); 



Jordan &. Gii.nEm', Synopsis, 868, 1883. 

 Lariipeira ciimtschalica, PallaS, Zoogr. Roseo-Asiat., iii, 07, 1811, Kamchatka. This was 



apparently not intended as a binomial name. 

 f Petroniijsoii borealis, GiRARD, Pac. K. R. Surv., 377, 1858, after P. flui-iali!:, Richardson, nu/ntiuned 



only as a small lamjjrey attached to an Inconnu in Great Slave Lake, " very like Bloch's 



figure" of L. fmiiatilu. 



Hi. LAMPETKA SPADICEA, Bean. 



Dorsals separated, the interspace i the snout, insertion of first at 

 middle of body; second dorsal little higher than first; infraoral lamina 

 with 9 cusps, the outer largest; lingual teeth with about 20 pectin te ; 4 

 bicuspid teeth on each side of disk. Guanajuato, Mexico. (Bean.) (spa- 

 diceus, nut-brown.) 



Lauquira fpadicea, Bean, Proc. U. S. Nat. Mus., 1887, 374, Guanajuato, Mexico. (Tyjie, No. 

 38005.) 



14. lAMPETRA CIBARIA, (Girard). 



Lips fringed; infraoral lamina with 8 or 9 subequal cusps; about three 

 teeth on each side of buccal disk, the middle one usually tricuspid, the 

 others bicuspid; teeth on upper part of disk simple; dorsal fins slightly 

 connected at base; second dorsal not much higher than first, much lower 

 than inL.wilderi; insertion of dorsal a little behind middle of body; 

 63 muscular depressions between last gill opening and vent; head 10 in 

 length. Color plumbeous, sides silvery. L. 8 inches. Pacific slope, from 

 Fraser Eiver to the Sacramento, Eather common in the rivers and brooks 

 northward, (cibariun, pertaining to food.) 



Pelromijzon plumbem:, AvREs, Proc. Cal. Ac. Sci., 1854, 28, (name preoccujiied), San Francisco. 

 Animocveles cjtai «(.«, GiUAUD, Pac. B. R. Surv., 383, 18.58, larva, Puget Sound; Joudan & Fordice, 



I.e., 2!)2, 188G. (Type, No. G17C.) 

 l'etromij;:oii ayrcsi, GUN'i'HKR, Cat., viii, 505, 1870, British Columbia. 

 Latiqietra plumbed, Jordan & Gii.nKiiT, Synopsis, 8, 1883. 



l.'i. LAMPETRA WILDERI, Gage, new species. 



(Small Black Lajiprey.) 



Head moderate, about as long as the thorax ; mouth small ; snout shorter 

 and lii)S, less fringed than in L. planeri ; dorsal fins connected only in 

 breeding season, inserted behind middle of body, considerably depressed 

 in front of the vent, but not divided into 2 fins; posterior lubo highest; 



