38 
AUSTRALASIAN ANTARCTIC EXPEDITION. 
upper lip of the mouth, and especially along its median line, on the ridge which extends 
upwards to the anterior margin of the prostomium ; and (2) the elongated lips of thi 
notopodial and neuropodial lobes are coloured dark brown or purplish brown. 
These two features I found very useful in distinguishing readily the species from 
H . tuber os a. 
As to the chsetae. The latest drawings are those of Fauvel (1916, pi. VIII, figs. 
8, 9). He shows the dorsal chteta as having a row of stout spines along one edge, 
each spine being apparently the enlarged marginal tooth of one of the pectinated frills. 
My own observations do not bear out this interpretation ; the frills certainly project 
a good deal beyond the edge, and the appearance produced is of rather stout spines, 
but I interpret this as being due merely to the fact that two or more of the pectinations 
are here seen one over the other, producing indistinct thickening of the frill. I do not 
find definite spines here, nor do other authors. 
In the ventral chsetay however, there are in the distal frills definite spines which 
are shown by Willey (pi. XLIII, fig. 2). 
In this paper (1902) Willey distinguishes “three principal allotypic modifi¬ 
cations ” of the species, one of which he retains as a distinct species, and refers it to 
McIntosh’s Lagisca crossetensis. The other two are described as varieties of //. spinosa, 
namely, “ var. typica ” and “ var . fullo,” with a sub-variety u lagiscoide o.” The two 
latter varieties are characterised by, among other things, the presence of long conical 
tubercles or spines on the elytra; the last variety by the fact that the hindmost seg¬ 
ments are not cervered by the elytra. 
Gravier (1911) describes in detail examples of the two varieties, “ typica ” and 
“ lagiscoides ,” and mentions that the latter has the elytra more deeply pigmented than 
the former. 
I have, as already noted, a very large series of the species —but I have failed to 
find any in which the hinder segments are thus exposed. It is true that I have not 
been able to give the time to sorting out of this series into groups or varieties, and the 
range of variation in several characters is very considerable, as Elders has shown, yet 
both in large and small specimens, in those with dull and in those with bright colouration 
the elytra cover the whole body. It must, however, be noted that in many cases the 
elytra had fallen away ; but I find, as Gravier did, that none of those examined with 
this purpose possess as many as forty segments, the number given by Willey for this 
particular individual. Is it possible that he had under observation some other 
species ? 
Localities .— 
Boat Harbour— 
2- 4 fathoms, coll, by l)r. A. L. McLean (fourteen). 
3- | fathoms, coll, by Dr. A. L. McLean (twenty-one). 
fathoms, coll, by Dr. A. L. McLean (three). 
