63. AULOEHYNCHID^ AULORHYNCHUS. 
391 
Family LXIIL-AULORHYNCHID^. 
Body elongate, nearly cylindrical, with a very slender, depressed cau- 
dal peduncle. Skin naked, with a few series of partly concealed plates. 
Mouth terminal, small, at the end of a tube which is about as loug as 
the rest of the head ; teeth very small ; branchiostegals 4, Gill-mem- 
branes slightly connected, free from the isthmus. Dorsal liu with many 
small, low, free spines, each of which is depressible in a groove; soft 
dorsal short, elevated in front ; anal similar to the second dorsal, pre- 
ceded by a single spine ; caudal fin small, forked. An oblong, naked 
area in front of the pectorals. Veutrals thoracic, but inserted some- 
what behind pectorals, I, 4, or I, 5. Genus 1; species 2. Small fishes 
of the North Pacific, intermediate between the Sticklebacks and the 
Trumpet-fishes. 
{Aulorhi/nchidce Gill, Proc. Acad. Nat. Sci. Phila. 1832, 233.) 
a. Ski u of head naked ; veutrals 1, 5; pectoral fins eniargiuate.. .AuLORiiYXcnus, 192. 
192.— AUI.OKIlVJ\<DBilJS Gill. 
(Gill, Proc. Acad. Nat. Sci. Phila. 1861, 169: ty])e Anloyhynclins Jlamdus Gill.) 
Body very long and slender, almost cylindrical; caudal peduncle 
elongate, tapering, much depressed, especially posteriorly. Skin naked, 
with a series of small, rugose shields, one on each side of the lateral line, 
one on each side of the dorsal fin, and a double row on the lower edge 
of caudal peduncle. Lateral line present. Head not mailed. Mouth 
small, horizontal, at the end of a tube which is slightly longer than 
the rest of the head. Premaxillary bones much expanded, with long 
and slender processes; lower jaw projecting, with a flap at symphysis. 
Teeth in the jaws rather sharp, almost in one series; palate tooth- 
less. Dorsal spines numerous, entirely separate, equal and veiy short, 
the first in.serted above the pectorals. Dorsal and anal fins posterior, 
nearly equal, oblong, elevated in front; caudal fin small, eniargiuate; 
pectoral fins emarginate, the upper and lower rays longest; veutrals 
not much behind pectorals, each with 1 spine and (4) 5 rays, [aukuq^ 
a tube; puyyroq, snout.) 
a. Latcrjil shields imbedded, not sxiinous. (Aulorhi/nchus.) 
625. A. llavidHS Gill. 
Tawny, with about 20 darker cross blotches on the back; minutely 
punctulate above ; opercula and ante-pectoral region with bright golden 
or coppery lustre, bordered above by a blackish band. Gill rakers sleu- 
