NOTES ON NUDTBRANCHS. 
87 
simply hamate, rather stout, and blunt. Those near the rhachie 
are small and low, the full size being attained only about the tenth 
tooth. The outermost are thin, but not degraded. 
The stomach is large and external to the liver. It has thick walls 
and a copiously laminated interior. The intestine also is large, and 
runs far forward before turning backward. The liver is greenish 
brown, but covered by a thick layer of the whitish hermaphrodite 
gland. It is very deeply cleft in front, and the glandular layer 
covers both sides of this cleft, and also penetrates into a smaller 
cleft running to the right. Thus the anterior right-hand corner 
of the liver almost forms a separate mass, but the two portions are 
connected below. 
The central nervous system shows a number of distinct coarse 
granulations, but the different ganglia are not at all distinct. It is 
enclosed in a very tough spotted membrane. 
The blood gland is large, greenish grey, and, though compressed 
together , seems to be divided into several lobes. 
The genitalia are as described by Bergh. The ampulla of the 
hermaphrodite gland lies on the anterior genital mass in a few short 
coils. There is no prostate. The vas deferens is thin and coiled. 
The round spermatotheca has a very short duct, and is nearly 
sessile. The spermatocyst is unusually large, sausage-shaped, and 
bent on itself. The vestibulum genitale is black. 
I have no doubt that this specimen is Bergh’s Phlegmodoris 
( Trippa) mephitica. It agrees in structure and general appearance 
with the original specimens with which I have compared it, and also 
offers many coincidences in detail, such as the granulate nervous 
system and the deep cleft in the liver. I have also no doubt that it 
is the Doris areolata of Alder and Hancock, and should bear that 
specific name. It is possible that this and the D. spongiosa of 
Kelaart are both varieties of one species, for D. spongiosa appears 
to be similar, but without the black pits. But until a specimen with 
the external characters described by Kelaart has been examined. no 
conclusion is possible. 
Discodoris fragilis (A. & H.). 
— Disc. morphcea , Bergh, Mai. Unters. in Semper’s Reisen Heft. XII., 
pp. 536-40, id. Challenger Report, 1884, pp. 93-8. 
See A. & H. I., pp. 118-9 ; Eliot 2, p. 1004. 
Two specimens from Colombo. They are somewhat bent, but 
about 75 mm. long. In one the auto to my of the mantle which is 
characteristic of the species is commencing, but the flap has not yet 
been thrown off. The texture is soft, though the tubercles on the 
dorsal surface are hard. 
The colouration of both specimens is extremely complicated, but 
not quite the same, though similar, since in one the predominant 
7(14)09 
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