AND ACCOUNT OF A NEW SPECIES FROM THE INDIAN SEAS. 23 
this marked external character. M. Le Sueur has represented his species as covered with 
numerous, small, narrow, transverse patches. The head is short, and projects much trans- 
versely from the great size and almost pedunculated form of the eyes. The arms, eight 
in number, are comparatively short and strong, and the disk from which they originate 
is separated externaily by a deep sulcus from the rest of the head. The suckers are very 
small, few in number, with short peduncles, and are placed alternately on all the arms. 
The posterior or upper pair of arms are by much the smallest ; they measure five lines 
in length, and have about fourteen suckers on each. The second pair is equal to the 
inferior or front pair ; they measure eight lines, and have about thirty suckers on each. 
The third or outer pair are longer, and much stronger than the other arms, and may 
compensate for the want of tentacula; they are an inch and a quarter in length, and 
have each thirty-two small suckers. The third pair of arms are those generally most 
developed in the Naked Cephalopods. At the base of this large pair, and between them 
and the front or inferior pair of arms, is seen on each side a small cylindrical tubercle, 
occupying the usual position of the tentacula of other genera, and destitute of suckers. 
These rudimentary tentacula, about a line in length, of equal size, and rounded at their 
extremity, present no appearance of laceration. If this animal agreed in structure or 
characters with any other known genus of Cephalopods possessing tentacula, it might 
be imagined that in the present instance the tentacula had been early and simultaneously 
cut off, and were now being reproduced. Neither Lamarck nor M. Le Sueur notices 
these minute tubercles at the outside of the inferior pair of arms. 
The mouth is closed externally by a corrugated outer lip!, which sends out a muscular 
band to the base of each arm, and the usual circular fimbriated lip within this imme- 
diately invests the two small dark brown horny mandibles. The exposed brown portion 
of the mandibles is very short ; they have sharp cutting margins, and the lower ex- 
tends over the point of the upper mandible. The eyes are very prominent, and the 
lens projects through a circular fold of the skin, which is spotted to the margin, 
and passes transparent over the lens. Around the lens the sclerotic has a singular 
tuberculated appearance, presenting seven round projecting eminences of a shining 
silvery lustre, like so many smaller lenses placed around two thirds of the eye-ball, 
and leaving only the posterior third of the circumference free. The rest of the eye- 
ball has a beautiful deep purple colour. The peduncle of the eye, into which the optic 
nerve enters as a long round cord coming from the distant supra-cesophageal ganglion, 
is like a smaller eye-ball placed behind the larger exterior. The surface of this pos- 
terior rounded peduncle of each eye has a deep brown colour, and is composed of 
fibres directed forwards to the base of the eye-ball. The same appearance is slightly 
represented in the figure of Lol. cyclura of M. Le Sueur, as seen from behind. The 
funnel extends far forward from the sac ; it is wide, with loose parietes, but possesses 
no trace of the internal valvular fold? which we observe in Loligo, Sepia, and Sepiola. 
‘ Fig. 5. * Fig. 6. 5 See fig. 4. where it is represented laid open. 
