POLYCH^TA— BENHAM. 39 



Commonwealth Bay — 



Station B, 25 fathoms (sixty-five). 

 Station C, 15-20 fathoms (fom'teeu). 

 Station D, 45-50 fathoms (twelve). 

 Station E, 55-60 fathoms (eleven). 

 Station 1, 340-400 fathoms (nine). 

 Station 3, 157 fathoms (one). 

 Station 8, 120 fathoms (five). 

 Station 10, 325 fathoms (two). 

 Station 12, 110 fathoms (twelve). 



Distnbutian.—Mage\\a,n Strait {Kinhevg, CTiube, Mcintosh), Marion Island, Prince 

 Edward Island (Mcintosh), Cape Adare (Willey), Coulman Island, Kaiser 

 Wilhelm II Land (Ehlers), Graham's Land (Gravier), Falkland Islands, 

 St. Vincent Gulf and Spencer Gulf, South Australia (Fauvel).* 



One of the specimens from Station C has a parasitic Copepod attached between 

 two of the parpaodia, as figured by Willey (pi. XLl, fig. 4). 



Harmothoe tuberosa Elders. 



Harmothor spinosa, variety Ehlers (1908), p. 43. 



Harmothoe tuberosa EUevs (1912), p. 11, pi. I, figs. 1-7. 



(Plate 6, figs. 22-29.) 



The account given by Ehlers, apart from one or two details, is adequate. The 

 coloured figure represents a much redder tint than is exhibited by any in the present 

 collection, where the worms are grayer, sometimes paler, sometimes darker, sometimes 

 with a purplish tone, sometimes bluish, and usually with a metallic lustre. 



It does not appear to attain the dimensions oiH .spinosa, for the largest individual 

 measures only 50 mm., with a diameter over the elytra of 15 mm. The body itself, 

 measured on the ventral surface at segments 7-18, is 7 mm. across : thence it tapers 

 gradually, so that at the 26th segment its breadth is 5 mm. 



The species is apparently much rarer than H. spinosa, for thougJi it occurred 

 in eight hauls, which yielded twenty-six individuals, and except at a depth of 25 fathoms 

 (Station B), only one or two were obtained in a haul. It is apparently commoner at 

 the less depths, for at this Station B as many as fifteen specimens were brought up 

 by the dredge. 



'■ Fauvel mentions a specimen as occurring aa a commensal in a tube of Thelepus ip. 



