REPORT ON THE NTJDIBRAN CHIATA. 
33 
Scyllcea pelagiea, Linne (PI. XL fig. 20). 
Scyllcea pelagica , L., Bergh, Beitr. z. Kenntn. d. MolL des Sargassomeeres, loc. cit., pp. 
1288-1293. 
„ „ L, Bergh, Malacolog. Untersuch, loc. cit., pp. 319-334, Taf. xh, xlii., xliii. 
figs. 1-6. 
Five specimens were taken in the Atlantic, on the snrface, attacked to a Fucoid, May 
4th and 5tk, 1876. 
The larger individual measured 3 ‘5 cm. in length, ky L2 cm. in height, and ‘75 cm. in 
breadth. The height of the rkinopkoria was 5 '5 mm., of the first pair of dorsal papillse 
7 '5 mm., of the second 7 mm., of the caudal crest 5 ‘5 mm. The colour of the animal 
is a dirty yellowish- white. 
The form of the body was quite as usual, and also the head and rhinophoria ; 
the club of the latter was provided with about seven leaves. The branchise were 
grouped in the following way. Nine or ten more or less distinctly separated tufts were 
situated on the inside of the first pair of papillse ; thirteen or fourteen rather smaller 
branchise on the inside of the second pair, and on the sides of the caudal crest were four 
to five small branchial tufts, and in addition a few small tufts were found in the 
neighbourhood of the interpapillary margin. The anal and genital papilla together with 
the renal pore were perfectly typical, as also the foot. 
The visceral cavity extends about as far as the anterior end of the caudal crest. 
The centred nervous system presented a commissure no longer than in the example 
already figured by me ; 1 in no other specimen did I ever see it much longer ; the three 
portions of which the commissure is made up were easily to be distinguished ; the 
subcerebral commissure appears never to be distinct. 2 The eyes and otocysts were as usual. 
The bulbus pharyngeus is about 4;6 mm. long, and of the usual form ; the mandibles 
have already been described by me as well as the peculiar armature of the masticatory edge 
which can easily be rubbed off, thus leaving the jaw smooth. The tongue presents its usual 
appearance, the radula containing seven series of teeth and sixteen series within the sheath, 
the total being therefore twenty-three rows. In the posterior row of the tongue there 
are thirty-six lateral teeth (on either side of the median tooth) ; thirty-nine in the 
posterior row of those within the sheath. The form of the teeth presented no peculiarities. 
The salivary glands were quite typical. 
The oesophagus and anterior division of the stomach were typical, the second division 
possessed fourteen strong plates ; the characters of the intestine and liver, with its two 
divisions and the ramified hepatic tubes were as already described by me. The renal 
system presented no deviations from the structure which has been described by Hancock 
and myself. 
1 Malacolog. Untersuch., loc. cit., Taf. xl. figs. (13), 14. 
2 H. v. Jhering describes the commissures as much longer and the subcerebral as distinct. Vergl. Anat. d. Nervensyst. 
d. Moll, 1877, p. 176. 
(ZOOL. CHALL. EXP. — PART XXVI. 1884.) Cc 5 
