226 PROF. W. A. HASWELL : 



nearly at right angles with the rest of its length in the manner described 

 by Vignier (34), by St. Joseph (31), and by Pierantoni (28). The most 

 dorsally placed seta is simple, gently curved towards the end, and pointed ; 

 along the concave edge of its terminal part runs a row of exceedingly small 

 hair-like teeth. The remaining seise, usually six in number, are all com- 

 pound and of the same general character, with well-developed, though short, 

 terminal appendages. In sexually matured specimens, but not in females 

 bearing external ova or embryos, there are bundles of long capillary setaB 

 (natatory or puberty seta?) beginning on the 12th to the 14th segment and 

 ending on the 28th to the 35th. 



The proventriculus (gizzard), when the proboscis is fully retracted, lies in 

 the filth and sixth setiiierons segments. Its wall contains about 15 rows of 

 muscle-columns. Yellow glands and " glandes a batonnets " are both present. 



The eggs and embryo are borne in pairs on the ventral side. 



Sph^erosyllis perspicax, Ehlers. 



? Sphcerosyliis herguelensis, Mcintosh, 20, p. 206, pi. 29. fig. 5 ; pi. 8.3. fig. 10 ; and 



pi. 15 a. fig\ 22. 

 Sphcerosyliis perspicax, Ehlers, 11, p. 66, tab. 6. figs. 1-3. 

 ? Sphcerosyliis antarcticus, Gravier, 15, p. 12. 

 Sphcerosyliis perspicax, Augener, 1, p. 250. 



The Sphcerosyliis which I refer to the above-named species is compara- 

 tively very rare in my experience in Port Jackson. 



Augener found it also rare in the South Australian collection of the 

 Hamburg Expedition to South Australia. It differs from the common form 

 which I have referred to S. ht/stria', (1) in having the palpi relatively 

 shorter, not produced into such a long narrow anterior prolongation, and 

 beset with well-formed papillae ; (2) in the presence of the third or frontal 

 pair of eyes ; (3) in the acicula being straight to the end ; (4) in the much 

 greater length of the proventriculus, which extends nearly through four 

 segments, and has about 20 rows of muscle-columns in its walls ; and (5) in 

 the embyros being borne on the dorsal side, four on each segment. 



Sph^erosyllis hirsuta, Ehlers. 



Sphcerosyliis hirsuta, Ehlers, 8, p. 48, Taf. 3. figs. 58-60. 



Sphcerosyliis hirsuta, Ehlers, Annelid, d. Valdivia-Exped. Band xvi. p. 66. 



Sphcerosyliis hirsuta, Ehlers, 10. 



Sphcerosyliis hirsuta, Augener, 1, p. 249. 



This species appears to be common in South Australia, but I have not 

 hitherto succeeded in finding it in Port Jackson. The embryo-bearing 

 females should be readily distinguishable from those of S. hystrix by 

 the dorsal position of the embryos and their occurrence in fours. From 

 S. perspicax the absence of the frontal eyes seems to be the only important 

 distinction. 



