288 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



173. A. nifjor Rich. 



Black. u it h about 22 luminous spots between chin and ventrals. Bar- 

 bel a little longer than head. Dorsal beginning just behind base of 

 vcmrals: pectoral not reaching nearly to ventrals. Jaws equal. Eye 

 large, well forward. Head 4; depth 5i. D. 17; A. 14. Deep waters 

 of the Atlantic; described from specimens from the Grand Batiks, per- 

 haps belonging to a different species. 



(Richardson. I.-hlh. Voy. Sulpb. 97; Giinthcr, v, 425.) 



FAMILY XLVI. SALMONID^E. 



(The Salmon Family.) 



Body oblong or elongate, covered with cycloid scales. Head naked. 

 Mouth terminal, varying much in si/e and form; maxillary forming the 

 lateral margin ol' the upper jaw, provided with a supplemental bone; 

 premaxillaries not protractile. Teeth various, sometimes wanting. (Jills 

 4, a slit behind the fourth. Pseudobrauchirc present, but often small 

 or rudimentary. Gill-rakers various. Gill-membranes not connected 

 free from the isthmus. Branchiostegals 3-20. No barbels. Dorsal usu- 

 ally nearly median, not greatly elongate. Adipose fin present. Cau- 

 dal fin forked. Anal lin moderate or rather long. Ventrals moderate, 

 nearly median. Pectorals placed low. Lateral line present. Abdo- 

 men rounded. Air-bladder large. Stomach ccecal or siphonal; the py- 

 loric C<LMM i. \v or many, sometimes obsolete. Ova generally large, fall- 

 ing into the cavity of the abdomen before exclusion. Genera about 20; 

 species 1U.3. A large and varied family; its members inhabit chielly the 

 fresh waters of northern regions, many of them being anadromons, 

 running up from the sea to spawn in the rivers. One genus (L'dro- 

 piniKi) is found in New Zealand, and the species of Microstoma, Arycn- 

 tiim, and }It/i>li<tl<>iinl,-its are mostly deep-sea fishes. In economic im- 

 portance this family ranks among the very lirst, and the salmon and 

 trout in all northern regions arc the choicest pri/es of the angler. 

 i ( .imi her, \i, 1 -.'().">.) 



Pylorir n.-r.-i l',-u urnuiir; .stuuiiicli 



I'm nc:irl\ it\Tilic- \c-ntr:ils. ( . l/'./i iiliniiid'. ) 



a. Branohiostegals 3 or 4 ; Ixxly i-lmi.nalr, sul>cyliinlric:il ---- MlCUOSTOMA, 1U8. 

 an. ]5r;ilicliiiis|i-^:i! , i; 8; bodj ciiiiiliivsscd. 



b. Adipose I'm !<>n^ and low, scarcely shorter than dorsal I'm. 



MA I.LOTUS (.juv.) 

 I'll. Adipose I'm normal, :.hort and hi^h. 



c. Ventrals inserted in front ol' I he middle of ihe dorsal; month lurjje. 



\er\ small; males \\ith villons hands; teeth leehle; pectoral 

 rays UJ--JU ............................. M ALLOT us, 140. 



