244 SUBANTARCTIC ISLANDS OF NEW ZEALAND. [Polychaeta. 



anterior segments they scarcely reach the tip. St. Joseph has drawn attention to 

 the fact that the chaetigerous lobe is highly retractile, so that its length, relatively 

 to the dorsal cirrus, is variable. (Cf. Plate IX, figs. 6, 7.) 



The ventral cirrus is quite short. 



Tlie notopodium is represented by a black aciculum with 2 very delicate colour- 

 less aristate homogomphs, in which, however, there is a very slight inequality in the 

 height of the lips of the articular cup. 



The neuropodial bundle contains the aciculum with 1 or 2 pale slender hetero- 

 gomphs, with a very finely toothed "arista."* Below these are about 8 stout 

 dark-brown falcate heterogomphs, the appendix of which is fringed with coarse 

 blunt teeth, closely set along the whole length. (Plate IX, fig 9.) 



The posterior lip of the chaetigerous lobe, which is the longer, is bluntly conical ; 

 the anterior lip is rounded. 



The dorsal cirrus in the greater part of the body is well provided with blood- 

 vessels, as described by St. Joseph (1903) and by Johnson. The vascular supply 

 is more complex than would be gathered from these accounts. I find, in addition to 

 the plexus of finer vessels which ramify near the surface of the cirrus, a coil of larger 

 vessels in a cavity at the base of it ; but I have not traced the matter further. 



The pharynx has no paragnaths, and in this respect Lycastis again differs from 

 the typical condition of Nereis. The jaw is dark brown in colour. The part which 

 protrudes from the muscular wall has 4 or 5 teeth in addition to the terminal point ; 

 the imbedded part has indications of several other teeth, but they are all united 

 by chitinous material. 



Locality. — Campbell Island : Perseverance Harbour, on shore near the exit of 

 a creek from the flank of Mount Honey ; the shore above high-water mark is traversed 

 by numerous little watercourses oozing through the earth above (W. B. B., Feb- 

 ruary, 1907) : also, in sea-pools ; (G. Marriner, November, 1907). 



Distribution. — Magellan Strait ; Fuegia ; Chili. 



Ehlers (Polychaeten : Hamb. Magalhaens. Sammelr., 1897, p. 70) states that 

 this species " is verj' euryhaline, in that it was found on the sea-floor at 7 fathoms, 

 on the sea-shore below stones and injthe sand, as well as under stones at the 

 mouth of a stream, and in fresh-water ponds " Most of the species of Lycastis 

 occur in fresh or brackish water. For an account of this habit, see Johnson (4). 



Fam. EUNICIDAE. 



Marphysa, Quatrefages, 1865. 



Marphysa aenea, Blanchard. 



1849. Eunice aenea, Blanchard, in Gay's Hist. fis. y poUt. de Chile, Zool., iii, 

 p. 19. 1864. Nauphanta corallina, Kinberg, Annulata nova. Ofvers. K. 

 Vet. Akad., p. 564. 1865. Marphysa peruviana, Quatrefages, Hist. Nat. 

 Annel., i, p. 336. 1901. M. corallina, Ehlers, Die Polychaeten magel. u. 

 chilen. Strandes, p. 131, pi. xv, figs. 13-18 (gives full synonymy and 



• This term is suggested by Johnson (5) for the long appendix of those chaetae called by Ehlers 

 " gratenborsten " ; and such chaetae he terms " aristate." 



