H. B. Kmx.—On the Anatomy of Sepioteuthis bilineata. 155 
but a short distance backwards on the outer aspect, being here shortened 
by a concave border. At the sides they expand and become irregularly 
oblong in shape. They have a somewhat irregularly waved outline and 
extend forward beyond the uncus, so as to cover the inner portion of the 
ale of the upper-jaw. The apophysis extends outwards and backwards 
with a slight curve, its shortest length being at the median line, where the 
margin is concave. Its greatest length is within, where the margin is con- 
vex. The apophysis slopes rapidly from the median line, leaving a well 
marked keel. 
(Note.—In describing the jaws I have not adhered to the rule of speak- 
ing of the animal as though it were in a walking position, but have noticed 
them as they are detached and shown in the drawing.) 
Taste-organ (fig. 3 a).—Within the jaws and on the posterior side of the 
mouth is the gustatory organ, showing a fairly well-marked division into 
two lobes. It is soft and uncurved, and under the microscope shows inter- 
lacing fibres. 
Odontophore (fig. 8b).—Next follows the broad radular band which 
works in and out of a socket in the centre of a raised papilla. It is armed 
with seven rows of silicious teeth. Its upper part is expanded, and has the 
margins recurved. The lower part has the margins incurved so as to form 
a cylinder, and it is probable that this part is but little used in mastication. 
The teeth on the upper part are stronger and stouter. 
The central row of teeth consists of slightly curved, rather stout and 
obtuse spines, whose bases develope short obtuse prominences, one on each 
side, giving the denticles of this row a 8-fid appearance. The first lateral 
row consists of slightly curved spines, somewhat more acute than those of 
the median row. The spines have the base also developed as in the 
median row, but the inner basal spine is somewhat shorter than the 
outer. The next two rows consist of longer curved spines without basal 
spinules. 
Faucial follicles (fig. 8 d). Next come the two “faucial follicles.” They 
are attached along one side, starting at the tongue and continuing to the 
commencement of the esophagus. They are very well developed. The 
free margin is straight, and when folded over they form a covered channel 
over the radular socket. 
Salivary glands.—The mandibles, tongue, odontophore, and faucial 
follicles are contained in the buccal mass, which narrows into the «eso- 
phagus. Outside the buccal mass, at the commencement of the esophagus, 
are two slightly-raised papille, the lingual salivary glands. Further along 
the esophagus, and imbedded in the liver, are two salivary glands with 
well-marked ducts. 
