142 PROF. OWEN ON NEW AND RARE CEPHALOPODA. 
to so many little eyes suggested the “nomen specificum.” On the arms they are limited 
to the outer or peripheral facet, and thereupon are well marked, arranged in an irre- 
gular triple row along the basal third, and in a double row for the rest of the extent. 
The ground-colour is fainter on the contiguous brachial facets, but is as well developed 
upon the central as on the peripheral facets of each arm. The tentacles and fins showed 
little or no pigment. 
The funnel is of large proportional size, extending along the ventral side of the head 
almost beyond the space between the eyes. Its free exserted part is shown, reflected, in 
Pl. XXVII. fig. 1,m. On each side of its intrapallial base is the cartilaginous socket, 
9 lines in length by 3 lines in breadth, for articulating with the corresponding cartila- 
ginous prominences on the opposed inner surfaces of the mantle. Coexisting with this 
articular apparatus (“‘ appareil de résistance,” d’Orb.) is the infundibular valve. 
Both the above structures of the funnel, common, as a rule, in Decapods, are either 
nonexistent or unnoticed in previously described species of Loligopsis'. 
The gladius or pen of L. ocellata (Pl. XX VI. fig. 8) is 4 inches 5 lines in length, 9 lines 
in extreme breadth. The shaft, 7, extends forward about 9 lines in advance of the 
vane, s, but is continued along the mid line of that part, gradually attenuating, to the 
subobtuse end, which occupies the interpinnate prominence of the body. The shaft 
commences in the medio-dorsal production of the fore part of the body. The vane gains 
its extreme breadth about one fourth of the way to the hind end, toward which it 
gradually narrows. ‘This likeness of the “ gladius” to the feather, the present species 
of Loligopsis shows in common with most of the ordinary squids (Loliginide). In 
Loligopsis veranii there is a vane-like expansion at both ends of the gladius, with a 
long intervening slender shaft°. In Loligopsis pavo the fore part of the shaft is longer 
than the hind part supporting the vane*. A similar shape of gladius occurs in L. eyclura 
(L. guttata, Grant) *. 
The following are from notes taken on dissection of the specimen above described :— 
The cartilaginous cranium presents on its dorsal aspect a general convexity with a 
transversely cordiform outline, the point being anterior, the notch posterior. The ventral 
surface offers two lateral convexities, with a middle longitudinal channel perforated by 
the two large pallial nerves and, above them, by the large vein. Two muscles of the eye- 
ball arise from the lateral part of the anterior margin, about a line apart; they con- 
verge and expand upon the sclerotic. A second muscle arises from the mesial surface 
near the hind edge of the ventral plate of the cranium, and expands upon the corre- 
sponding surface of the eyeball. A third muscle passes transversely between the two 
* Op. cit.: L. pavo, dOrb., p.321; L. cyclura, Vér., p. 322; L. peronii, Lam., p. 323; L. chrysophthalmus, 
d’Orb., p. 324, Amongst the infundibular characters of the genus is “V’intérieur simple, sans valvule,” 
p. 321. I am unwilling to propose a generic name on the difference above noted in the present specimen. 
> Op. cit. “ Loligopsis,” pl. ii. fig. 3. 3 Thid. Loligo, pl. vi. fig. 4. 4 Thid. p. 322. 
