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Show 1 9 0 6 . ] OF SOUTHERN INDIA AND CEYLON. 6 4 7 Doris sccibra, referable to the genus Platydoris. The drawing, which is not reproduced, leaves but little doubt of this. P la tyd o ris stria t a (Kelaart). Kelaart, 1. c. I. p. 302. (A. & H. 1. c. p. 117.) A single specimen is preserved in bad condition, having apparently been allowed to dry before being put in fresh spirits. As preserved, it suggests that the colour was lighter than in Alder and Hancock's plates, and the fine brown lines, though distinct, much fewer. The buccal mass had apparently been extracted, but a few scattered teeth were found among the internal organs. They are hamate and rather slender. Little could be made out of the genitalia, which were small and hardened. A tube lined with the characteristic yellow folds and lumps was found, but no scales or hooks. It is very probable that they are really present, but Bergh (‘ Siboga,' p. 138) reports that in PI. flammidata the male organs are provided with a " Langsfalten bildenden Cuticula mit spitzen und gerundeten Hockern verselien aber ohne die gewolinlichen Dorntragenden Sclieiben." It is therefore possible that they may be absent in this species too. P la tyd o ris e l liot i (A. & H.). (A. & H. 1. c. p. 116. Discodoris ellioti Bergh, Siboga, p. 102.) Three of Alder and Hancock's type specimens are preserved. One is quite hard, and was probably dried before it was put into spirits. Nothing could be made of it. The other two are soft and somewhat decayed. The texture is not that usual in Platydoris, but the present flaccid condition may be due to decomposition. The buccal parts had been removed from one specimen but remained in the other. No labial armature was found, but a number of yellowish hamate rather slender teeth, set in no apparent order, the ribbon of the radula being decomposed. The armature of the genitalia is very distinct. The efferent duct is thickly covered with discs bearing spines of the form typical of the genus. The spines are mostly stout and straight; some are a little inclined, but not bent. There is no doubt of the existence of this characteristic armature, but owing to bad preservation it is hard to say if it is on the vas deferens or the vagina, but probably the former. Bergh originally placed this species under Platydoris (Syst. d. Nud. Gast. p. 1102), but subsequently (I. c.) identified it with a Discodoris obtained by the ‘ Siboga ' from Makassar. It would appear, however, that the earlier classification was correct, for the genitalia are armed as in Platydoris and there is no labial armature. The absence of the latter is confirmed by Alder and Hancock's description, for under D. ellioti they say " Tongue as in |