336 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY, 
4 and 5mm. long; in one specimen the right is longer, in another the 
left, in three they are equal. The gill and spermatic groove are white. 
At the sides of the mouth and under the projections of the anterior 
shield are numerous bluish-white prominences bearing bristles. They 
are more numerous than in C. hirundinina, and are not grouped 
symmetrically. The pharynx is not large, 3mm. wide, and moderately 
muscular. It is succeeded by a narrow tube, which passes into the 
hepatic mass without giving rise to any dilatation or stomach. The 
prostate is granulose and deeply bifid. The verge is large (7 mm.), 
and the sack in which it is contained ends in a globular expansion. 
The shell is brown, entirely membranous, and apparently hatchet- 
shaped. 
CHELIDONURA (?) HIRUNDININA, Var. PUNCTATA., D.var. 
GRIF TE Bie: (23) 
Three specimens from Zanzibar. The living animal, when in an 
extended condition with the parapodia folded, was about 35 mm, long. 
The colour is black, with a very thin white line round the parapodia ; 
while all over the body, and even on the under surface, there are 
large orange spots. The animal is fairly active in its movements, 
but adheres only slightly. The crawling surface does not appear to 
be differentiated from the rest of the body in any way. 
The measurements of the largest alcohole specimen are as follows : 
Length 18mm., breadth with the parapodia folded 11mm., with 
the parapodia fully extended 21 mm., anterior head-shield 9mm. 
long, two-thirds of which is formed by a free flap behind; the 
posterior processes 5mm. long. The orange spots have become 
pale blue. The gill is yellowish white and concealed more than 
usual, being placed in a distinct gill-chamber under and behind the 
right posterior process. The large parapodia are united in an ample 
expansion under the two posterior processes, strongly resembling 
the disposition of the same parts in Gastropteron. There are no 
symmetrically placed prominences round the mouth as in the specimens 
of C. hirundinina examined by Bergh (Zool. Jahrb., Ba. xiii, Syst , 
p- 214), but merely a number of indistinct and irrecularly ere anulated 
lumps. The pharynx is not very large (2°5mm. long by 2mm. 
broad), but is thick and muscular, and yellow in colour. The shell is 
unusually thick though brittle, pink, and entirely calcified. 
These specimens have not the typical coloration of C. hirundinina, 
but Professor Mobius (as quoted by Pilsbry, Man. Conch., vol. xvi, 
p- 85) found an individual which was ‘‘ bluish-black with yellow 
spots . . . . the reflexed foot margins on the back having 
a narrow clear green edge.’’? This is clearly the same animal as my 
specimens, and in view of the tendency displayed by all the Doridiide 
to vary in shape and coloration it is ‘safer to regard it provisionally 
as a variety. Iam not sure, however, that the position of the gill 
and the arrangement of the sense organs round the mouth do not 
constitute specific characters. 
Cuetrponura Puirrnopsis, n.sp. 
One specimen from Chuaka, Zanzibar. The general colour of the 
