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Show 1906.] OF SOUTHERN INDIA AND CEYLON. 1 0 0 1 the animal should be called, so far as our present knowledge goes ; but in the following descriptions I have thought it safer to put first the names written 011 the bottles by Alder and Hancock, which imply 110 identifications into which an element of theory may possibly enter. D oris gloriosa Kelaart. = Hexabranchus marghiatus Q. & G. The labial armature and radula confirm this identification. The formula of the radula is about 30 x 60.0.60 as a maximum. The teeth are hamate and rather erect; the outermost smaller but not degraded ; the 4-5 innermost markedly smaller than the rest and almost without hooks, as if the tips were broken off. D oris glen ie i Kelaart. = Chromodoris gleniei (Kelaart). A labial armature and radula are preserved, showing that Alder and Hancock dissected a specimen, though, so far as I know, they have left 110 record of their investigations. The labial armature consists of two grey, roughly triangular plates, distinctly separate but almost touching one another. They are composed of bent rods, slightly swollen at the tips. The yellow radula has a formula of about 60x70.0.70. On the rhachis are lozenge-like areas. The teeth are strong and erect and bear at least 6-8 denticles 011 the outer side. As the teeth are in situ and none are isolated, the denticles are nowhere easy to see and become almost invisible in the last 30 teeth, though since they can be seen here and there they are perhaps present on all. The innermost teeth are broad and bear at least one large denticle on the inside and perhaps two or three. The outermost are low, not denticulate on the top, but bearing one jag or denticle at the side. This radula and labial armature show that I). gleniei is a Chromodoris, and support the idea that it is closely allied to Chr. cavce Eliot, which may be a variety of it. C hromodoris z e b r in a . A. & H. 1. c. p. 123. Alder and Hancock describe the radula as a generic character, but their remarks, confirmed by the slides, show that the description applies to the species Chr. zebrina. The buccal parts as preserved comprise a labial armature and radula. The former consists of two plates, composed of elements arranged in unusually regular rows and apparently mace-like in shape, though none are completely isolated. The outer ones are bifid, but this feature is not so plain in those near the centre of the plates. The radula is in confusion, but consists of at least 40 rows containing numerous, minute, two-pronged teeth which bear 3-4 66* |