DISCUSSION OF SPECIES AND THEIK DISTKIBUXION. 363 



I. Three dorsals aiid two anal fins — Continued. 



2. Lower jaw longest. Barbel al)scnt or rudimentary. 



a. Vent in vertical from si)ace between first and second dorsal. 



Teeth of npjier jaw equal roi.i.Acmr.s 



Outer row of teeth in upper jaw largest Borkocadi :s 



b. Vent in advance of vertical from origin of first dorsal. 



First anal very long. Second dorsal small JIicromesistu, s 



II. Dorsal fins two, anal one. 



A. Ventrals narrow, filamentous, l>i- or tri-radiate I'huciiw 



1. First dorsal with 8-10 rays PiiYcis 



2. First dorsal of 5 rays Ljsmone.ma 



B. Ventrals broad, with 5-8 rays. 



1. Anal fin entire. Mouth terminal Lotina; 



a. Vomer with teeth ; palatines toothless. A barbel. 



All teetli villiform. 



Head not compressed. Ventrals narrow [Lota.] 



Head somewhat compressed. Ventrals broad [S^vlilota] 



Vomer and mandibles with enlarged teeth SIOLV a 



b. Vomer and palatines toothless. 



Teeth in jaws villiform, equal. Barbel PiiTsicuLtr.s 



An outer series of strong curved teeth in each jaw. No barliel Uraleptl's 



An outer series of strong teeth in lower jaw. Barbel Lotella 



2. Anal deeply notched or in two parts. Moutli inferior or snbinferior Morimv 



a. Anal in two iiarts. 



Teeth cardiform, in band in upper jaw Mora 



b. Anal more or less deeply notched. 



Teeth on vomer. Barbel. 



Snout obtuse. Bones of head firm Lepidion 



Snout produced. Bones of head cavernous, with largo luuciferous cavities. .Antimoka 



No teeth on vomer. No barbel. Anal in two connected divisions. 



Snout obtusely conical. Mouth wide, nearly terminal HAL.4.RGYRErs 



C. Ventral rays .5 or more, elongate, oxsertod. 



1. Ventral rays 5, very elongate, the three median ones with lanceolate tips. 



a. A large abdominal cone ERETMoriioRis 



2. Ventral rays 7, some of them slrglitly prolonged and witli rounded heads. 



6. No abdominal cone HvrsiRiiYNcms 



III. Second dorsal and anal continuous with caudal. No barbel ilelanoniiiw 



A. No teeth on vomer and palatines. 



1. Jaws with bands of small teeth, with an outer row of larger ones Stkinsia 



B. Teeth on vomer and palatines in narrow strips. 



1. Jaws with teeth in villiform l>ands. 



a. Tail long and tapering Melaxoxus 



IV. First dorsal composed of a single ray and a baud of fringes. Second dorsal and anal distinct Oninw 



A. Barbels three. 



1. Snout without cirrus Oxos 



B. Barbels four. 



1. Snout with cirrus - RiiisoxEMrs 



V. Dorsal and annal fins single. 



A. Ventrals well developed Brosmiiiw 



1. Tooth on vomer and iialatines. 



a. Teeth in upper jaw in narrow baud. A barbel Brosmus 



2. No teeth on vomer and palatines. 



a. Teeth in jaws biserial. No barbel -- Brosmicuui.s 



GAD US, Artedi. 



Gad,m, Artedi, Genera Piscium, 1788, xi.\.— Linnjsus, Syst. Nat., ed. x, 1758, 2.52.— Bonaparte, Fauna Italic.a, 

 fasc. 23, 1838. 



Gadoid fishes witli 3 dorsal and two anal Hus, tlie anterior dorsal beins' but slii;litly 

 elevated. Head large, oblonj;-, conic, and pointed; the snout at least twice as lonj: as tlie 

 eye, the maxillary reaching past the front line of the eye. Mouth large, liarbel well de- 

 veloped. Ventrals normal. Lateral line pale. 

 19868— No. 2 23 



