REPORT ON THE NUDIBR AN CHIATA. 
149 
The buccal tube is 4 ‘5 mm. long, the interior as usual; the protrusor muscles are covered 
at their origin with a pigmented sheath. The bulbus pharynmus about 6 mm. long, 
5'5 mm. broad, and 3'5 mm. high; the large radula-sheath (with the dark prolongation 
of the radula) only projects slightly. The palatal plates, and their denticles, quite as 
strongly developed as in the former species. The tongue is as usual ; in the dark amber- 
coloured glittering radula there were thirty-three series of teeth (counted along the 
outer margin) ; further back there were thirty-one series, of which four w r ere incom- 
pletely developed ; the total number is thus sixty-four. The fifteen or sixteen anterior 
rows were more or less incomplete, 1 and the teeth themselves frequently worn out ; in the 
hindermost rows of the tongue there were eighty teeth on each side, and the number 
appeared not to increase notably further back. 2 The teeth in colour and shape were 
quite like those of other species; the median teeth (PL VII. fig. 9 ,ci,a) perhaps a little 
longer and broader behind. 
The salivary glands are of nearly equal size, yellowish-white and of irregularly oval 
form, 6 mm. at their greatest diameter, by 375 mm. to 4 mm. in length, and 2 mm. to 2 '5 
mm. in thickness ; the outer surface smooth and convex, the inner very uneven. The 
gland is made up of a number of variously sized lobules united (fig. 10). The duct has 
an outer pigmented sheath, it is 3 mm. long. 
The oesophagus forms a short ampulla, 1'6 mm. broad, just behind the pharynx, pig- 
mented black on the outside, the folds of the interior were stronger here than elsewhere ; 
the whole length of the oesophagus is about 13 mm., and its diameter 1 mm. to 1'3 mm. 
The first stomach is pear-shaped, its length and diameter being about 4’3 mm. The 
masticatory stomach is of the usual form and appearance ; its breadth is 9 '5 mm. with a 
length of 7 mm. and a height of 5’5 mm.; the thickness of the walls reaches 4'2 mm.; 
the structure is quite similar to that of the previous species, and even more easy to see; 
the band between it and the third stomach is quite as usual. The third stomach 
is strongly pigmented (black) on the left and upper sides, and somewhat depressed ; its 
greatest diameter about 7 mm., its least 3 mm. ; the lamellatecl structure as usual, the 
height of the leaves reaches to 2 ‘2 mm., the number of the largest and medium sized 
leaves is about thirty, between them are moreover a number of small ones ; two of these 
leaves fused together are also seen continued into the intestine. The intestine had a 
length of about 9 ‘5 cm. by a breadth of 1'8 mm. to 1'2 mm. — The contents of the alimen- 
tary tract were littoral Algae, sand, and calcareous mud, portions of sponges, Diatomaceae, 
and Poly thalamia ; frequently there were to be found teeth of the radula of the animal itself. 
The livers had a dirty greyish-yellow colour, the upper surface covered with white 
points. 3 The anterior liver is about 11 mm. long by 7‘5 mm. broad and 4 mm. in 
1 The anterior row was reduced to a median and one lateral plate, the following series to : — 5-1-7, 7-1-5 . . . 4 . . 3, 
28-1-30, and so on. 
2 Semper ( loc . cit., p. 257) describes 131 teeth in each properly developed row. 
3 The white points were possibly the eggs of some parasite. 
