THE MAEINE ANNELIDES OF THE OEDEE SERPULEA . 

 SOME OBSEEYATIONS ON THEIE ANATOMY, WITH 

 THE CHAEACTEEISTICS OF THE AUSTEALIAN 

 SPECIES. 



By William A. Haswell, M.A., B.Sc. 



[Plates XXXI. to XXXV.] 



In the following paper are given the results of some observations 

 and researches which I have made during the last few months on 

 the Serpiilea of Port Jackson. The number of species which I 

 have made the subject of investigation is limited ; but it com- 

 prises representatives of all the principal sub-divisions of the ^roup. 

 These differ very little from their European allies, and there is 

 nothing specially to characterise the Australian members of the 

 order so far as I have had the opportunity of investigating them. 

 To the notes on the species which I have myself examined I have 

 added the descriptions of others previously described by other 

 writers as found on the Australian Coast. 



The researches of Claparede (I) on the minute structure of the 

 sedentary Annelides have left butlittle to be done by his successors, 

 and I find that the results of a considerable amount of work 

 comprise but few facts which were not previously observed and 

 illustrated by the Genevese savant. There are, however, two 

 subjects in which I think I have been enabled to add to our 

 knowledge of the group, and to those I have mainly confined 

 myself in the following notes on the anatomy. 



(1) '•Rccherches sur la Structure cles A nuclides Seklentaires, ,: Geneva, 1873; 

 ' 'Annelides Che'topodes du Golfe de Naples," Geneve et Bale, 1868, with Sup- 

 plement, 1870; "GlanuresZootomiques parmi les Ann^lidesde Port Vendres," 

 1868; " Beobachtungen iiber Anatomieund Entwickelungsgeschichte wirbel- 

 loser Thiere." 



