270 



MR. CYRIL CROSSLAND ON THE 



[Feb. 16, 



feneoiis sliacled to fulvous on the head and less distinctly so on 

 the thorax. 



EXPLANATION OF PLATE XVII. 



Eis 



. 1. Lema cetMopica, p. 233. 



2. Jj, humeronotata, p. 234. 



3. Cryptocephalus suhconnectens, 



p. 243. 



4. C. sexplaffiatus, p. 246. 



5. C. beiraensis, p. 244. 



6. C. sheppardi, p. 242. 



Fig. 7. Cryptoceplialus o'neili, p. 243. 



8. Iliopristis o'neili, p. 236. 



9. Damia trifasciata, p. 240. 



10. Colasposoma beiraense, p. 261. 



11. Menius brevicornis, p. 251. 



12. JEurydemus genicvlatus, p. 250. 



3. The Polychaeta of the Maldive Archipelago from the 

 Collections made by J. Stanley Gardiner in 1899. 

 By Cyril Crossland, B.A., B.Sc, F.Z.S., the Gatty 

 Laboratory, St. Andrews. 



[Received December 15, 1903.] 

 (Plates XYIII. & XIX.* and Text-figures 38-42.) 



Cn^TOPTERiDiE and part of the EuNiciDiE. 



Note. — It was at fii-st intended to publish these results as part of Gardiner's 

 ' Fauna and Geographj' of the Maldive Islands,' as indicated by the references in my 

 paper on Pht/llochcetopteriis 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 Polychceta 

 (o/. below, p. 287). 



Genus Ch^topterus. 



The species of this genus are difficult to determine on account 

 of the numerous very imperfect descriptions published and the 

 variability common apparently to all the Chsetopteridse. Only 

 the European species has been at all fully described (by Joyeux- 

 Lafiuie). His revision of the species is for the above reason con- 

 fined to a consideration of the variations of the European form 

 and the conclusion that they all belong to one species, C. vario- 

 23edatus. Difi'erences 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 Chcetoptems from Japan does 

 not figure in Joyeux-Lafiuie's literature list, nor does the latter 

 work out the difl^erences in the setae and uncini of different parts 

 of the body as Marenzeller does for his species C. cautiis. I have 

 followed Marenzeller's method with C. variopedatus, and find that 

 his description of the setae of C. ccmtus serves perfectly for those 

 of C. variopedatics, except that the uncini differ slightly in size, in 

 correspondence with the sizes of the worms {C. cautus is about 

 80 mm. long, C. variojyedatus about 115). The numbers of the 



* For explanation of the Plates, see p. 286. 



