CEPHAIyOPODA OF THE HAWAIIAN ISLANDS. 
333 
much more slender, more acutely tapering; hooks entirely lacking; suckers exceedingly minute, occur- 
ring in two distant narrowly spaced rows of lo to 14 suckers each, which are confined to the more distal 
portion of the arm. 
Tentacles short, stout, cylindrical, but little longer than the arms; near the base of the stalk a 
conspicuous circular constriction, beyond which the stalk swells out again, attaining a diameter even 
greater than that of the proximal portion, thence tapering gradually to the short blunt tmexpanded 
club. Suckers on inner surface of club minute, in four rows; the five 
proximal members of the dorsal row distinctly the largest, even exceeding 
in size the two suckers on the carpus, which together with two small pads 
constitute the fixing apparatus. (PI. Lii, fig. 3.) 
Subocular photophores numerous, at least 14 on each eyeball, but in 
the present material exceedingly diiiicult to locate with certainty, due to 
the ease with which they become detached upon the removal of the outer 
lid. Most conspicuous are two very large circular organs situated one just 
behind the other on the ventral periphery of the eyeball, just in front of 
the funnel (fig. 36, no. 8 and g). Well anterior to these and more or less in 
line with them are four very much smaller organs (nos. 11-14). Just pos- 
terior to the lens is a large conical organ (no. 10), while a conspicuous series 
of seven moderately large organs form an oblique ctuve in front (nos. 1-7). 
Of the latter the three upper (nos. 1-3) are very large and conical in outline; 
the next two and the last one are smaller, but the next to the last one (no. 6) 
is large flattened, of ovate outline, and pale in color, very different in appearance from any of the other 
organs. (See also pi. lii, fig. i.) 
Color in alcohol a grayish buff, the chromatophores somewhat darker. Buccal membrane purplish, 
with paler trabeculae. The gladius shows through the dorsal integument as a prominent median line. 
Measurements oe Pterygioteuthis microlampas. 
Number in author’s reg:ister 
277 
278 
Number in author’s register 
277 
278 
$ 
? 
? 
? 
Total length 
Tip of body to tip of arms 
mm. 
31 
28 
18 
6 
8 
3-5 
14 
5-5 
mm. 
Length of— 
Head 
mm. 
4 
6 - 5 
7 - S 
8 
7 - 5 
12 
mm. 
Length of mantle, dorsal 
7 
8 
8 
7*5 
Width of mantle 
6 
Width across eyes 
7 
Fig. 36 . — Pterygioteuthis micro- 
lampas, diagram to show ar- 
rangement of photogenic or- 
gans of left eyeball [277], X s- 
Type . — Catalogue No. 214386, United States National Museum [S. S. B. 277]. 
Type locality. — Albatross station 4105, in 314 to 335 fathoms, Kaiwi Channel, bottom of fine coral 
sand and foraminifera, July 24, 1902; one 9 specimen. 
Distribution . — Hawaiian Islands (Albatross). 
Specimens of Pterygioteuthis microlampas examined. 
No. of 
speci- 
mens. 
Locality. 
Depth 
in 
fathoms. 
Collector. 
Sex. 
Where deposited. 
Author’s 
register. 
a I 
I 
Kaiwi Channel 
No locality 
314-33S 
(?) 
Albatross Sta. 4105 
Albatross Sta. (?) 
U. S. Nat. Mus. Cat. 214386 . . 
Fragmentary 
277 
278 
60289° — Bull. 32 — 14 22 “Type. 
