HOYLE: REPORTS ON THE CEPHALOPODA. 41 
by two pairs of smaller suckers, and. then. by à large number of gradually di- 
minishing suckers in four series. Besides the two large proximal suckers are 
two rounded pads, situated in hollows, so placed that they occupy two angles 
of a rhombus, the suckers occupying the other two. With the suckers they 
undoubtedly constitute a fixing apparatus, as suggested by Fischer. 
The Surface is smooth throughout. 
The Color, in the spirit specimen, is a pinkish yellow, rather darker above ; 
the buccal membrane a dull yellowish purple, paler within than without, 
The Radula (Plate 7, Fig. 7) is remarkable for the complexity of the central 
tooth, which consists of a triangular cusp, springing from a rather irregular 
base; on either side of the base, near its posterior end, there is a prominence, 
which sometimes forms a separate denticle, united by a distinct articulation 
with the body of the tooth ; this is seen on the left-hand side of the portion 
drawn. The first laterals are stout and simple, an acute point springing grad- 
ually from a somewhat rectangular base. The second and third laterals are 
very much alike, sickle-shaped, bent almost to a quadrant, and rather blunter 
than the others: the outer series are comparatively more slender than the 
inner, 
Dimensions, 
mm. 
Length, total (excluding tentacle) . . . . . . . 88 
End ot body to mantlenargin v 4 v. vs 4. 19 
Brenuch Or NOUY cy = soa er ee d 
BeDEULORDD v. . v v ao a a a a 9 
SPAN OU ‚a O 
Length of first arm . . . e . Sup o 
Length OL Second hnc. V A IT 
Length or third ama ww aic oo ed 
JEULOLIONPULAMD s o a 0, Vo NU S 
WONG OL toniolo » +... 5S e c IS 
On opening the mantle-cavity there are seen just behind the base of the 
funnel two acorn-shaped bodies, one on either side of the middle line, the rec- 
bum passing forwards between them.  Farther back in the middle line is a 
Spheroidal body, very much like an eye in general appearance; still farther 
back in the middle line is a fourth, and at the root of each gill is another 
larger one; these are phosphorescent organs, and an account of their structure 
will be found in the Appendix (p. 51). 
Professor Pfeffer has included in the genus Plerygioteuthis Rüppell’s species 
hitherto known as Enoploteuthis margaritifera. This view I adopted in a 
communication (:02) dealing with the luminous organs of the latter species, 
but further consideration has led me to the conclusion that the differences 
between them are too great to allow of such a course. They agree in form and 
general appearance, in the size and deep color of the buccal membrane, in the 
tips of the arms being devoid of either hooks or suckers, and very strikingly 
