POLYCH^ETA-BENHAM. 27 



The anal segment carries a pair of cirri similar to the dorsal cirri. 



The extent of the pharynx and the proventriculus (or stomach) agrees with that 

 shown in his figure. 



T received some specimens from Dr. Haswell in which eggs were attached to the 

 parapods. 



Ehlers has described the epitokous phase. 

 Locality. 



Boat Harbour, Commonwealth Bay, 3-4 fathoms. 



Distribution. Kerguelen (Mclntosh), South Georgia, Kaiser Wilhelm II Land 

 (Ehlers). 



Sub -family AUTOLYTE^. 

 Genus AUTOLYTUS Grube. 

 AUTOLYTUS CHARCOTI Gravier. 

 Gravier (1906), p. 7, pi. I, figs. 1, 2. 



(Plate 5, figs. 7-10.) 



Of this species, both the atokous and the epitokous phases of both sex are 

 represented ; the latter have not hitherto been described. 



Atokous phase. 



Of the seven specimens of the atokous phase in the collection, some were still 

 within thin transparent membranous tubes ; of which one measures 30 mm. in length 

 and 4 mm. in diameter. The tubes were attached to one another, side by side, forming 

 a small mass; and to one was attached a portion of a colony of a Hydrozoon. 



The contained animal is complete and measures 26 mm. in length, with a breadth 

 of 3 mm. at about |rd of its length, whence it tapers slightly both anteriorly and 

 posteriorly ; it contains 70 segments. The body is flattened dorso-ventrally and has 

 height of 2 mm. (fig. 7). Another individual, from Boat Harbour, was free from its 

 tube ; is 18 mm. in length and 1-5 mm. across the body, which is built up of 68 segments 

 or more, the last few being very small. Smaller worms were also present, one of which 

 with a length of 6 mm. was stained and mounted entire. It is still within its thin tube 

 and came from the same station in Commonwealth Bay as that first mentioned. 



Gravier had only two specimens, one of which was entire, and is smaller than 

 some of those before me. 



The worms are pale-brown in colour with a transverse bar of somewhat darker 

 tint across each segment, the width of the bars being rather greater than the pale space 

 separating them. As Gravier has noted, this banding is more marked towards the 

 middle of the body length. 



The first mentioned worm is full of eggs, though the body is not yet differentiated 

 into regions ; there are none of the characteristic long slender bristles that indicate the 

 epitokous phase. 



