420 FAUNA HAWAIIENSIS 



closely coiled. The duct of the spermiducal gland is directed rather forward, as is so 

 often the case in barbadensis, and is rather curved, especially at the end, where it is 

 distinctly thinner. This thin termination was not observable in one individual in which 

 the male pores had the appearance of being somewhat everted. These worms are 

 undoubtedly my hesperidum. 



It is interesting to find from three distant parts of the world specimens of a worm 

 associated with a form from which they can be easily derived, by a reduction of the 

 number of spermathecae, and by an emphasising of the slightly coiled diverticulum of 

 the parent (.'') form, by the loss of genital papillae and setae on the clitellum. The 

 coincidences are at least noteworthy. 



If we are to assume that the migration of the genus Aviyiitas from the Oriental 

 region is due always to the interference of man, it is most peculiar that they should have 

 been exported in lots of corresponding species. I do not however at present do more 

 than emphasise the facts which are as has been stated above. 



(4) Amyntas hawayanus Rosa. 



Perichaeta hawayana Rosa, Ann. k. k. Hofmus. Wien, 1891, p. 396. 



PericJiaeta berviudensis Beddard, P. Z. S. 1892, p. 160 



Perichaeta barbadensis Beddard, ibid. p. 167. 



Perichaeta morrisi Beddard, ibid. p. 166. 



Perichaeta mauritiana Beddard, ibid. p. 1 70. 



Perichaeta mandhorensis Michaelsen, Arch. f. Naturg. 1892, p. 241. 



Perichaeta pallida Michaelsen, ibid. p. 227. 



Perichaeta amazonica Rosa, Atti R. Ac. Torino, 1894, p. 4. 



Perichaeta ciipnlifcra Fedarb, Proc. Zool. Soc. i8g8, p. 445. 



The collection contains a considerable number of examples of A. hawayanus. 

 These show so many variations that I believe myself to be able to justify the above 

 rather formidable list of synonyms, which are a little more extensive than the list given 

 by Dr Michaelsen' in a recent paper. My original description of Perichaeta bermu- 

 densis was published when I was unaware of Dr Rosa's Perichaeta hawayana, though 

 his publication' seems to antedate mine. I was led in my " Monograph of the Oligo- 

 chaeta " to adhere to my species bcrmitdensis on account of the fact that Dr Rosa did 

 not mention in his description the larger size of the setae upon the anterior segments, 

 nor the presence of setae upon the last segment of the clitellum. The number of 

 papillae in the neighbourhood of the male pores seemed too to be different in the two 

 series of worms from Hawaii and from the Bermudas. In the series of specimens in the 



^ Die Terricolen des Madagassischen Inselgebietes. Abh. senck. naturf. Ges. 1897, p. 234. 

 ^ Die exotischen Terricolen, &c. Ann. k. k. Hofmus. Wien 1891, p. 396. 



