142 " ENDEAVOUK " SCIENTIFIC RESULTS. 



There are, it is true, resemblances to Alitla virens, Sars, as 

 may be seen by consulting the memoirs of Malmgren,i 

 Ehlers- and TurnbuU-^ but from this species the present 

 differs not only in its collar-like lip but in the form of the 

 parapodium, especially in the much greater development of 

 the dorsal lamella and in the proportions of this to the other 

 parts of the foot ; in the greater length of the dorsal cirrus 

 as well as in other details which may be merely specific. 



Although A. virens, as well as some other species such as 

 N. lamellosa, Elilers-^ has the ventral surface of the peristo- 

 niium marked by furrows, so that it resembles C. jieristomialis 

 when the lip is folded fan-hke over the movith, yet in none of 

 them is there any evidence that it can be spread outwards 

 as it is here. Even Turnbull, who studied A. virens alive, 

 says nothing of this ; indeed his and other figures show that 

 it is not collar-like. 



ioc— Great Australian Bight, Long. 129° 28' E., 250-450 

 fathoms. 



Distribution. — I have specimens from New Zealand waters, 

 described in MS. some years ago, which agree precisely with 

 the above. One of them is in the Heteronereid phase, which 

 may as well be described here. 



The Epitokous Condition. 



In the epitokous state this worm consists of 130 segments 

 and measures 140 mm. Its greatest breadth is 20 mm. at 

 the 15th segment, including the para podia, or 10 mm. over 

 the body alone. 



The change in the parapodia occurs at the 27th segment, 

 when the various foliaceous outgrowths appear as small 

 structures, which gradually increase in size till the mid-body 

 and then dwindle again and disappear at about the 85th, so 

 that the worm is apparently not completely in the heteronereid 

 condition (PI. xlvii., fig. 22). 



In the 40th foot the dorsal lamella is higher, more promi- 

 nent than in the atokous state, and overhangs the base of the 

 dorsal cirrus, so that the notch becomes a deep bay. The 

 dorsal chsetse are replaced by the usual natatory bristles. 

 The dorsal, middle and ventral ligules have undergone little 

 change, but the ventral chsetophoral lip has developed a large 

 semicircular folium, as has also the base of the ventral cirrus. 



1. Malmgren — Nordislia Hafs-annulaten, 1805, p. 183. 



2. Ehler.s — Die Borstenwiirmer, 1864-68, p. 559. 



.3. Turnbull — Trans. Connecticut Acad., iii., 1876, p. 266. 

 4. Ehlers — Loc. cit., p. 564. 



