26 AUSTRALASIAN ANTARCTIC EXPEDITION. 



Each young one consists of head and 4 chsetigerous segments, followed by one 

 segnient with a parapod, but without chsetae, and the anal segment carries a pair of 

 long cirri. 



Owing to the position of the mother, I am unable to see the characteristic gom- 

 photrich, but as the specimens come from the same locality T have little doubt that it 

 is this species. 



Genus Sph^rosyllis Malmgren. 

 Sph.erosyllis McIntoshi Ehlers. 

 Salvatoria kerguelensis Mcintosh (1885), p. 188, pi. XXX, fig. 4 ; pi. XXXIII, 



fig. 1 ; pi. XV A, figs. 11, 12. 

 Sfhcerosyllis mcintoshi Ehlers (1897), p. 46. 

 SpJmrosyllis mcintoshi Ehlers (1913), p. 481. 



(Plate 1, figs. 4-6.) 



Ehlers has laready shown that Salvatoria of Mcintosh is in reality a Syllid 

 belonging to Malmgren's genus. Mcintosh, although he j^laced the worm amongst the 

 Hesionidse, recognised in the course of his account that in several features it approached 

 the Syllidse. 



In the present collection I find specimens of this small worm amongst those taken 

 in Boat Harbour during the month of .lune, 1912, in 3-4 fathoms of water. 



They are only 3-4 mm. in length with 28-33 segnxents. The tentacles and the 

 dorsal cirri have swollen bases and narrowed tips, but are not so short and stumpy as 

 in the typical SphcBrosyllis . The rounded prostomium (figs. 4, 5) carries three tentacles, 

 two pairs of eyes, and a pair of palps ; the last are fused and project beyond the 

 prostomium. Ventrally this region is deeply furrowed in the median line indicating 

 the double nature of this organ. Mcintosh, it will be remembered, denied the existence 

 of the palps ; but his specimens were soft and ill-preserved. 



He was, I think, in error too in stating that the filamentous tapering extremity of 

 tentacle and cirrus is " distinctly segmented," for in my specimens, ^ diich are well 

 preserved, there is no indication of this, though there are a few quite irregularly disposed 

 constrictions along this region, when the animal is mounted in glycerine. 



I have thought it well to give a careful drawing of the head (fig. 4) as Mcintosh's 

 figure, the only one as far as I know that has been published, is misleading. 



The peristomial cirri are short. The following segments carry long parapods, 

 each with a single bundle of chsetse, a dorsal cirrus, and a short cylindrical ventral cirrus 

 which extends beyond the chsetigerous lobe. 



The chsetigerous lobe is supported by two acicula, each of which is swollen just 

 below the point (fig. 6). Below these are 8-10 chsetse, the uppermost of which is 

 capilliform, as Mcintosh has noted, while the rest are gomphotrichs of the form shown 

 in his figure. 



