NOTES ON NTTDIBTtANCITS. 
91 
of the same purplish colour but darker. They are not numerous, and 
are set in a ring round the mantle margin and in fairly symmetrical 
rows on the back. They look as if they were tubercles, but in 
reality are very little raised, if at all, and the dorsal surface is 
practically smooth. The foot is yellowish, especially towards the 
margin. 
The lips are ample, and the buccal parts seem slightly protruded, 
but not enough to show the labial armature. There are no tentacles 
but the lips are connected with the mouth parts by two lappets. 
The rhinophores are dark purple. The branchiae are 12 and simply 
pinnate ; their colour is much like the dorsal surface, but the axes 
are beautifully lined with white on the inner side. 
The labial armature is a narrow band, composed of rods. The 
formula of the radula is25x 14 + 1*0*1 + 14, and the teeth have 
the remarkable shape described by Bergh. The innermost on 
either side of the rhachis are large, broad, and divided into two 
portions at the top. The outer of the two portions bears six or 
more denticles. The remaining teeth are thin and erect, and bear 
about twelve denticles. 
This is apparently a dark variety of Bergh\s Halia decorata. It wi II 
be observed that the composition of the colouration is as described 
by him, though the general effect is different. Information as to 
the colour of the living animal is desirable, for these complicated 
patterns are often much altered by alcohol. 
The affinities of this remarkable form are doubtful, but it shows 
some resemblance to Sphcerodoris (especially Sph. levis) in both the 
external and internal structure of the mouth parts and in having 
simply pinnate branchiae. 
The radula also shows some resemblance to that of Thorunna 
furtiva, and both recall the dentition of the Poly cer idee y inasmuch 
as they are narrow 7 and have one tooth sharply differentiated from 
the rest. 
Chromodoris fidelis (Kelaart). 
Kelaart I., p. 295; Eliot I., p. 642. 
One specimen from Trincomalee. There are no notes on the 
living animal, but as Dr. Willey labelled the specimen Ghr. fidelis 
it presumably resembled Kelaart’s drawring, which has a very 
distinct colour pattern, viz., a white dorsal surface, with which 
contrast vividly a broad red border of irregular outline on the 
inner side, and black rhinophores and branchiae. In the preserved 
specimen the dorsal integuments are of a uniform white, but the 
rhinophores and branchiae are coal-black. The black liver mass 
can be seen through the integuments. 
The length is 8 mm. and the breadth 4 mm. The skin is smooth. 
The rhinophore sheaths are slightly raised. The mantle margin 
forms ample expansions over the head and tail. 
