BY J. J. FLETCHER, M.A., B.SC. 945 



further back, as well as in one or two other little matters. 

 To this group belong the Queensland and Darnley Island Peri- 

 chaetes, and a third species supposed to have been introduced 

 into this colony from Mauritius. They are all typical species 

 of the genus Perichoeta, and are very similar to others described 

 from various parts of S.E. Asia, the East Indies and elsewhere. 

 It is interesting to note the occurrence of these typical peri- 

 chsetes at Darnley Island and North Queensland, whereas, 

 further south they seem, as far as is known at present, to be 

 absent (unless McCoy's P. Gippslandica be one), and to be repre- 

 sented by the perhaps more modified forms such as we find in this 

 colony. These belong to the second group characterised by the 

 hemispherical arrangement of the setae, the circles being interrupted 

 in the median dorsal and ventral lines, by the absence of csecal 

 appendages of the large intestine, by the gizzard being placed 

 between the two mesenteries of one segment though these are 

 often displaced, and usually by the possession of fewer than four 

 pairs of sperrnathecae. I have described six species belonging 

 to this group, all, with the exception of one from North Queens- 

 land, from this colony ; while I have a few small specimens of at 

 least probably three undescribed species also from New South 

 Wales. Similar differences have been pointed out by other writers 

 in species usually referred to the genus Perichceta, so that Beddard 

 has suggested the advisability of instituting a second genus for the 

 reception of species resembling those of the second group above- 

 mentioned. I postpone the further consideration of this matter for 

 the present as I feel sure many new Australian species remain to 

 be discovered. 



By the kindness of Mr. Haswell I have been able to see a copy 

 of Kinberg's paper referred to on p. 539, from which I find that the 

 species of worm of which I gave a description under the name of 

 Lumbricus Novce-Hollandice is different from that described by 

 Kinberg under this name, and must therefore be separated from it 

 as a new species. The following modifications may, therefore, be 

 made in the list given. 



