90 AUSTRALASIAN ANTARCTIC EXPEDITION. 



The contained worm measures only 40 mm., exclusive of the tentacles, which add 

 another 10-12 mm. to the length. It is nearly cylindrical, tapering only slightly 

 posteriorly. 



The body contains about 70 segments ; the intersegmental grooves, however, are 

 very indistinct posteriorly, so that there may be more. 



The tentacular platform (fig. 95) is low, and the post-tentacular region bears an 

 irregularly double row of eye spots laterally, but this becomes a single row across the 

 dorsum ; the right and left rows are continuous, whereas Ehlers found a short dorsal 

 gap separating the two groups. 



The first segment is very short on the dorsal surface, but becomes swollen and 

 enlarged laterally (figs. 95, 96), projecting forward here. This glandular thickening 

 extends almost to the mid-line on the ventral surface, but the right and left lobes become 

 narrower as they approach one another and terminate in rounded lobes, separated by a 

 very narrow, short, non-glandular area. 



It is here that I find a difference from Ehlers' account. He represents a large 

 oval, forwardly-directed " flap " of much greater extent, and this, instead of tapering 

 off towards the mid-ventral line, is here almost as long as it is higher up the sides, and 

 the two lobes overlap. 



The second segment is likewise short on the dorsal surface, but is swollen so as to 

 form a transverse ridge, which crosses the dorsum and extends down each side as far as 

 the margin of the first gland shield. It is quite a definite structure ; but in Ehlers' 

 figure it seems to be confluent with the flap of the first segmeiit. Possibly these structures 

 are not at their full development in the specimens before me. 



The first notopod is borne on the third segment, and the uncini commence on the 

 fourth. On each of the segments 5, 6, and 7 there is, above the notopod, near the hinder 

 margin of the segment, a low but distinct nephridial papilla. 



There are 16-17 bundles of bristles, but there are only ten well-developed 

 notopodial outgrowths. 



The uncinigerous neuropods are short throughout the worm, and lateral in 

 position. Anteriorly, as in the 15th segment, there are 19 uncini, but further back th.e 

 number is reduced to 6 or 7. The uncini agree pi-ecisely with the description given by 

 Ehlers, and differ from those of L. abranchiata Malmgren and from L. wanddensis Gravier. 



The ventral gland shields number 1 1 , and are quadrate in form, except the first 

 four, which are narrower transverse glandular bands. 



Locality.— 



Commonwealth Bay, 15 fathoms (with T. ehlersi and Th. antarcticus). 



Distribution. — Kaiser Wilhelm II Land. 



