BY WILLIAM A. HASWELL, M.A., B.SC. 673 



14. Spirographs australiensis. N. sp. 



The body of this species is of a general light green colour, 

 slightly tinged with red along the middle dorsal line, a band of 

 blue being external to this. The branchiae, which are extremely 

 numerous, are ornamented with narrow longitudinal lines of rich 

 brown, the pinnules being almost white with a very faint tinge of 

 green; some of them towards the ventral side have the pinnules 

 lead-colour ; the base of the branchial is tinged with brown with 

 narrow longitudinal white lines ; the head-lobe is brown ; the 

 collarette tinged with brosvn. 



There are eight thoracic and, in a full-sized specimen, about 

 170 abdominal segments. The low collarette is cleft deeply in 

 the middle ventral line ; the ventral lobes have no papillae. 

 The ventral tentacles are short, slender, and pointed ; they are 

 coloured like the stems of the branchiae. The only representatives 

 of dorsal tentacles are two rounded brown lobes, at the apex of 

 each of which is a pore-like orifice : in a smaller specimen these 

 organs are ver} much more pi'ominent, and are flattened and 

 leaf-like, resembling those of Spvrographis Spallanzanii. 



The dorsal setae of the thorax and abdomen are alike ; they are 

 scarcely distinguishable from those of Sabella pitnctidata. The 

 uncini are simple hooks on the recurved limb of which are some 

 minute spinules. 



The total length of the tube is seven inches ; the diameter is 

 about half an inch. 



This species occurs about low-water mark on the shores of Port 

 Jackson. 



It is possible that the Sabella grandis of Baird (I.e., Part II., 

 p. 160), which is described as coming from New Zealand, may be 

 identical with this species, but the description is too inexact to 

 permit of any certainty. 



