94 SPOLIA ZDYLANIOA, 
generally one or two quite small plumes set irregularly between the 
large ones. Thus the total number is 13-14. 
The labial cuticle is unarmed. The formula for the largest radula 
is 22 X 27 + 1 ‘0*1 + 27; but most of the rows are considerably 
shorter. The first tooth on either side of the rachis is much larger 
than the others, but all have the same form, awl-shaped and erect. 
In the central nervous system the ganglia are very distinct. The 
cerebral and pleural portions are arranged so as to appear like the 
figure 8. 
The stomach extends unusually far back and is free on the upper 
surface (except in one specimen), but its under surface and extreme 
posterior end are covered by the liver. This latter is purplish and 
so loose in consistency that it hardly answers to the definition that 
the liver of the Holohepatica forms a compact mass. It opens into 
the central cavity or stomach by such numerous ducts that the walls 
look as if they were basket work. The hermaphrodite glands are 
not separate from the liver, but in all four specimens adhere to it so 
closely that the two organs are separable only with difficulty. The 
details of the arrangement are not the same in all the animals, 
though in all there seems to be two more or less coiled glands. In 
one they form two short simple coils on the anterior part of the 
liver about 6 mm. long. In another the liver has spread above the 
stomach more than in the others, and bears on its anterior portion a 
triangular mass of glandular coils, clearly divided into two halves 
down the middle. In the remaining two specimens the hermaphrodite 
glands are invisible from above, but are disposed on the lower surface 
of the liver in two thick, rather complicated coils about 9 mm. long. 
On the male branch of the genitalia is a very large prostate, the 
interior of which is composed of numerous leaves or laminations. 
Bergh also found this organ in T. alba var. pallida to be provided 
cc mil star ken blattartigen Falien der Innenseite” The vas deferens 
is not very long, and forms only one or two coils. The penis is thin, 
cylindrical, and covered with bent spines. 
I regard this animal as undoubtedly the genuine T. ceylonicM of 
Kelaart. It is characterized externally by its large branchiae, and 
internally by the structure of the hermaphrodite gland, which, though 
variable, does not in any specimen form globules separate from the 
liver. I think that Bergh’s T. rubromaculata is the same as this 
species. Of the hermaphrodite gland he says, “ zwei .... Zwitter- 
driisen die von Meniscus—Form waren .... am Hinterende der 
Leber, an dieselbe angehaftet.” This does not quite describe the 
conformation in the present specimen, but indicates that the gland 
is not separate. 
Doridopsis nigra (Stimpson). 
Three specimens from Trincomaiee. One, about 22 mm. -long, of 
a uniform jet black when alive, belongs to tlxe variety aterrima .. 
