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Show 270 MIL CYftIL CROSSLAND ON THE [Feb. 16. aeneous shaded to fulvous on the head and less distinctly so on the thorax. EXPLANATION OF PLATE XVII. Fig. 1. Lema eethiopica, p. 233. 2. L. humeronotata, p. 234. 3. Cryptocephalus subconnectens, p. 243. 4. C. sexplagiatus, p. 246. 5. C. beiraensis, p. 244. 6. C. sheppardi, p. 242. Fig. 7. Cryptocephalus o'neili, p. 243. 8. Miopristis o'neili, p. 236. 9. Lamia trifasciata, p. 240. 10. Colasposoma beiraense, p. 261. 11. Menius brevicornis, p. 251. 12. Eurydemus geniadatus,i>. 250. 3. The Polychseta of the Maldive Archipelago from the Collections made by J. Stanley Gardiner in 18DD. By C Y R I L CROSSLAND, B.A., B.Sc, F.Z.S., the Gatty Laboratory, St. Andrews. [Received December 15, 1903.] (Plates XVIII. & XIX.* and Text-figures 38-42.) CH^ETOPTERID^E and part of the EUNICID.E. N O T E . - I t was at first intended to publish these results as part of Gardiner's ' Fauna and Geography of the Maldive Islands,' as indicated by the references in m y paper on Phylloch&topterus from East Africa (P. Z. S. 1903, vol. i. p. 169). Since, however, it is now evident that a great simplification of the literature of the group can be made by publishing the two accounts together, they will henceforth appear under the one title shown at the head of Part III. of the East-African Polychseta {cf. below, p. 287). Genus CH^ETOPTERUS. The species of this genus are difficult to determine on accoxmt of the numerous very imperfect descriptions published and the variability common apparently to all the Chaatopterida?. Only tlxe European species has been at all fully described (by Joyeux- Laff'uie). His revision of the species is for the above reason confined to a consideration of the variations of the European form and tlxe conclusion that they all belong to one species, C. variopedatus. Differences in the number of the segments comprised in the three body-regions are given, but possible variations in other respects, which from a consideration of the numerous exotic species set up may be important, are not worked out. Marenzeller's description (5) of a Chcetopterus from Japan does not figure in Joyeux-Laffuie's literature list, nor does the latter work out the differences in the setaa and uncini of different parts of the body as Marenzeller does for his species C. cautus. I have followed Marenzeller's method with C. variopedatus, and find that his description of the seta? of C. cautus serves pex-fectly for those of C. variopedatus, except that the uncini differ slightly in size in correspondence with the sizss of the worms (C. cautus is about 80 m m . long, C. variopedatus about 115). The numbers of the * For explanation of tin- Plates, see p. 286. |
