REPORT OF COMMISSIONER OF FISH AND FISHERIES. [68] 
The exposed parts of the jaws are black and polished; their internal 
lamine are reddish brown, becoming translucent yellowish toward the 
margins. 
The upper mandible (Plate XIV, fig. 5) has an elongated, tapered, 
considerably incurved, and sharp rostrum; the notch is rather narrow 
and deep, and a wall: deyelaped: triangular, lateral groove runs down 
from the notch for some distance, its upper border being in line with 
the cutting edge of the rostrum. The anterior edge of the al, so far 
as normally exposed, is nearly straight, but slightly undulated. 
The lower mandible (Plate XIV, fig. 6) has the cutting edges of the 
rostrum slightly concave, with a slight notch close to the tip, which is 
small and incurved; the notch at the base is broad and shallow, bor- 
dered externally by a slight, angulated ridge; the exposed anterior 
edges of the alz have each two slight lobes, but are otherwise nearly 
straight; the ale are broader toward the inner end, which is obtusely 
rounded. 
The lower mandible now measures, from fas tip of the rostrum to the 
posterior dorsal border of the mentum, 13™"; tip to the extreme pos- 
terior end of the gular lamina, 50™; to the alsneel angle of the same, 
33"; tip to the inner end of the Aes 46™"; to the bottom of the notch, 
13"; breadth of alz, 24"; transverse breadth at notches, 12"", 
The upper mandible, SS the tip of the beak to the end of the 
palatine lamina, is 71"™" long; from tip of beak to end of frontal lamina, 
53"; to bottom of notch, 11"; length of exposed (dark) portion of 
nbs edge of alx, 14™. 
The odontophore (Plate XIV, figs. 1-4) has a very broad, thin, mar- 
ginal membrane, yellowish white in color, becoming brown and thick- 
ened toward the dentigerous portion, where there is a row of very small, 
thin plates, bordering the outer row of teeth; the ventral portion of the 
dentigerous band is dark brown, regularly convex, and narrowed grad- 
ually to the obtuse end; the dorsal portion is considerably longer, — 
abruptly bent backward, with the borders incurved, gradually decreas- 
ing to the posterior end; on this part the teeth become much smaller 
and paler. 
The outer lateral teeth, on the anterior portion, are long, slender, 
sharp, and strongly curved; the median ones are much shorter, with 
a sharp, strongly curved central point, and a very small, almost rudi- 
mentary denticle on each side; the inner laterals are a little longer than 
the median, with a stout incurved point; on the outer side of its base 
there is a small denticle; the teeth of the two onter rows, on each side, 
are simple. 
Length of odontophore, from anterior bend to posterior tip of dorsal 
end, 22™"; to tip of ventral end, 14™"; breadth of lateral membrane, 
in miele, 11™"; of dentigerous palit, anteriozly, Pz. 
The following measurements were made by Mr. Dall from the fresh 
specimens: 
