of Edinburgh, Session 1884 - 85 . 
305 
The fins are one-fourth as broad as the body, and placed much 
nearer the dorsal than the ventral surface ; they commence 2 to 3 
millim. from the anterior margin and are connected by a narrow 
fillet behind ; a slightly raised ridge passes down the ventro-lateral 
aspect of the body, similar to that seen in many specimens of Octopus 
and Eledone (possibly due to contraction). The mantle-margin pro- 
jects very slightly dorsally, and is a trifle emarginate opposite the 
funnel : the connective cartilages are deeper than in most species of 
Sepia, but there is no distinct knob as in Sepiella. The siphon 
reaches up to the depression between the ventral arms. 
The Head is broad, and the eyes prominent. 
The Arms are subequal, in order of length 3, 4, 2, 1 ; they are 
rather more than half as long as the body and distinctly three-sided, 
having a ridge on the outer side of each, broadest on the ventral 
ones ; they taper evenly to very fine points ; the inner surface of 
each is roughly papillate and has hemispherical depressions into 
which the suckers are retracted. The suckers are in four series 
throughout, almost hemispherical, not very oblique, and marked with 
meridional grooves : the horny ring bears irregular square teeth. 
The hectocotylus is not developed. The umbrella is larger than usual 
in the genus, reaching on an average about one-third up the arms : 
the buccal membrane has seven not very prominent points, and there 
is a spermatic cushion as usual : the outer lip is very thin, the inner 
thick and papillate. 
The Tentacle is about as long as the body, stout, indistinctly three- 
sided, and tapering. The club is short and but little expanded, with 
a narrow protective membrane on its outer side ; the sucker-bearing 
area is, as it were, undermined on its inner aspect by a deep groove 
or fissure, and internally to this again is a broad fin which reaches 
down the tentacle for a distance exceeding half the length of the 
club. There are three suckers much longer than the rest, whereof 
the middle one is the largest and the proximal the next, placed on 
stout peduncles arising in deep depressions ; towards the outer side 
of the club is a series of about four medium-sized suckers, and 
beyond these again one or two series of minute ones. The horny 
rings appear smooth under a powerful lens. 
The Surface is smooth in general, but there are a few irregular 
papillae in the ventro-lateral region. 
