78 
F. ERNEST WEISS. 
The buccal membrane is large, drawn out into seven points, 
and is devoid of suckers. 
The nuchal cartilage is flattened, and of what von Ihering 1 
(5) calls the Sepia type. 
The fastening of the mantle to the base of the siphon (PI. 
VIII, fig. 4) is by two depressions on the funnel, complicated 
by a lateral tooth, and by triangular cartilages on the mantle. 
The interior of the funnel is provided with a valve (PI. VIII, 
fig. 5) near its apex, which is drawn somewhat to a point in 
the centre. It is small, but not rudimentary, though it seemed 
smaller on first observation, as it adhered to the dorsal wall of 
the funnel. 
Midway between the eyes and the funnel on the ventral 
(infundibular) side of the body are two spoon-shaped organs, 
like those figured for Cliiroteuthis lacertosa by Verrill 2 (6), 
but which have neither been described nor figured for Chiro- 
teuthis Veranyi by D’Orbigny nor by Brock. They possess 
a small ganglion at their enlarged base, which seems to be 
supplied by a nerve from the cerebral ganglia, and I regard 
them as at all events originally olfactory in fuuction. I will, 
later on, point out their homology to the olfactory organ of 
other Cephalopoda, and with regard to the other groups of 
Mollusca, Professor Lankester has suggested to me that they 
might be homologous to the Gasteropod tentacle. 
The body of Chiroteuthis is elongate and very small com- 
pared to the size of the head and arms. 
On opening the mantle cavity we find the rectum with anal 
appendages not reaching up to the base of the siphon. 
The ink-sac is short, triangular in shape, and bears on its 
surface two glandular organs, which in position especially 
greatly resemble the accessory nidimental glands in Loligo, 
which resemblance is increased by the relation to these organs 
of the branches of the visceral nerves (PI. VIII, fig. 5). These 
organs are visible in Verany’s figures by transparency (PI. 39). 
Ventrally and slightly anterior to the base of the gills are 
1 von Ihering, * Zeitschrift fiir wissenschaftliche Zool.,’ 1881. 
2 Verrill, ‘ Transactions Connecticut Academy,’ 1882. 
