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Show 1004 SIR C. ELIOT ON THE NUDIBRANCHS rDec. 11, L_ 7 D oris fu n e br is Kelaart. = Kentrodoris annuligera Bergh. = K. maculosa (Cuv.). One radula is preserved, with a formula of about 22 x 25.0.25. The innermost teeth are smaller than the others and much as figured by Bergh. Label: D. b ell ico sa 32. Probably = Discodoris f ragilis (A. & IT.). Two radulse and labial armatures, labelled as above, seem really to belong to D. fragilis, for two specimens from which the laduLe have been extracted are numbered 32 and distinctly marked as D. fragilis. Alder and Hancock's remarks (I. c. p. 119) suggest that they originally registered the animal as D. bellicosa, and then came to the conclusion that it was distinct. The labial armature consists of two clearly-cut and symmetrical plates, somewhat wing-shaped, and resembling those of Disc, boholiensis figured by Bergh (in Semper's Reisen, Heft xvn. pi. dxxxvii. fig. 28). They are yellow and composed of a thatch of straw-like elements, which are sometimes sinuous, especially at the thin ends of the plates. The two radulse consist of about 30 and 40 rows respectively, and the smaller contains about 55 teeth on either side of the rhachis. The larger is obscured by the medium in which it is mounted. The teeth are hamate, rather erect, and moderately stout; they increase up to the middle of the half row. The last 4-5 are lower, but not degraded or denticulate. The innermost teeth of the two sides meet and almost cross one another, so that the rhachis must be regarded as really narrow ; but it appears to be wide, because the teeth near the centre (5-6 on each side) are set much more widely apart from each other than those which follow, and are small with low hooks. Possibly this part of the radula has been artificially stretched. Disc, fragilis is probably identical with some of the subsequently described species, and the specific name lias priority (1864) over all those given by Abraham, Bergh, and later writers, but must yield to bellicosa (1857) if the two prove to be identical. Alder and Hancock's statement of the differences does not amount to much, but, on the other hand, there is little resemblance between their plate and Kelaart's. D oris p ar dal is A. & H. = Discodoris pardalis (A. & H.). Labial armature yellow, consisting of rods not jointed, fairly straight but with a slightly undulated outline. The armature was apparently composed of two separate halves originally, but is now somewhat confused. The radula is also confused, but consists of about 28 rows, -containing from 12 to 30 teeth on each side of the rhachis. The |