288 COXTIIIIIUTIONS TO NORTU AMERICAN ICnXIIYOLOGY IV. 
'173. A. Jiifror Rich. 
ilhick, with about 22 luminous spots between eliiii and veiitrals. Bar- 
bel a little longer than head. Dorsal beginning just behind base of 
veutrals; pectoral not rea(;hing nearly to ventrals. Jaws e(iual. Eye 
large, well forward. Head 4; depth oA. 1). 17; A. 14. Deep waters 
of the Atlantic; described from specimens from the (Irand Banks, per- 
haps belonging to a dilfereiit species. 
(Riclmrdfion, Ichth. Voy. Snlph. 97; Giiiitbcr, v, 42;).) 
Family XLVI. — SALMONlDgE. 
{The Salmon Family.) 
Body oblong or elongate, covered with cycloid scales. Dead naked. 
i\Iouth terminal, varying mucli in size and form; maxillary forming the 
lateral margin of the upper jaw, provided with a supplemental bone; 
l>remaxillaries not protractile. Teeth various, sometimes wanting. Gills 
4, a slit behind the fourth. Pseudobrai3chia3 present, but often small 
or rudimentary. Gill-rakers various. Gill-mend)ranes not connected 
free from the isthmus. Branchiostegals 3-20. No barbels. Dorsal usu- 
ally nearly median, not greatly elongate. Adipose tin present. Gau- 
dal fin forked. Anal tin moderate or rather long. A^entrals moderate, 
nearly median. Pectorals placed low. Lateral line present. Abdo- 
men rounded. Air-bladder large. Stomach ccecal or sii)honal ; the py- 
loric cceca few or many, sometimes obsolete. Ova generally large, fall- 
ing into the cavity of the abdomen before exclusion. Genera about 20; 
si)ecies 125. A large and varied family; its members inhabit chiefly the 
fresh waters of northern regions, many of them being anadromous, 
running up from the sea to spawn in the rivers. One genus {Retro- 
l)inna) is found in New Zealand, and the species oi Microstoma, Argen- 
tina, and llyyhalonedrus are mostly deep-sea Ashes. In economic im- 
portance this family raidvs among the very Arst, and the salmon and 
trout in all northern regions are the choicest prizes of the angler. 
(Snlinonidtv Giiuthcr, vi, 1-205.) 
* Pyloric c(pc:i few or none; stoinacli ccecal. 
t Dorsal hn nearly over the veutrals. {Argentinlncc.) 
a. Branchiostegals S or 4 ; body elongate, subcylindrical Micuostoma, 138. 
aa. Branchiostegals 0-8; bony compressed. 
b. Adi])o.se tin long and low, scarcely shorter than dorsal tin. 
Mallotus (juv.) 
bb. Adipose lin normal, short and high, 
c. Ventnils inserted in front of the middle of the dorsal; month large. 
d. Scales very small; males with villous bands; teeth feeble; pectoral 
rays 16-20 Mallotus, 140. 
