3 
4 ‘* ENDEAVOUR” SCIENTIFIC RESULTS. 
succeeding plates wider than long, more or less tetragonal, 
broadly in contact. Beyond the eighth or ninth joints the 
under arm plates are nearly or quite separated from each 
other, pentagonal with proximal angle, much wider than 
long ; they keep this form to the end of the arm. Side arm 
plates rather large, but not conspicuous, well separated at 
base of arm, but broadly in contact distally ; each carries 3 
small arm spines, a minute, bluntly pointed, peg-like one on 
upper distal corner of plate (often wanting distally) and a pair 
of somewhat larger, more flattened spines, close to the lower 
distal corner of plate; except on one or two basal joints, 
none of the arm spines are as long as one-third the length of 
the side arm plates. Tentacle-pores rather larger ; the basal 
ones have 3 or 4 scales on each side, but the number soon 
dwindles to one on the under arm plate and one on the side 
arm plate and near the middle of the arm, the former dis- 
appears. Colour (dry), yellowish-white. 
This rather handsome species is well characterised by the 
peculiar oral papille, the arrangement of the arm spines, the 
shape of the papille in the arm-comb and the arrangement of 
the disk plates. In all these particulars, as well as in the 
shape of the under arm-plates it differs from A. ornata, which 
is one of its near allies, but except in the arrangement of the 
disk scales it is no nearer to A. undata, which is one of its 
nearest allies geographically. Its longer arms and _ very 
different arm-comb will distinguish it at once from A. cteno- 
phora (H. L. Clark) taken by the “ Thetis ” off the coast of 
New South Wales. 
Loc.—EKast of Babel Island, Bass Strait, 60-80 fathoms. 
Family OPHIODERMATID. 
Genus PrEctinuRA, Forbes. 
PECTINURA DyscrRITA, H. L. Clark. 
Pectinura dyscrita, H. L. Clark, Mem. Austr. Mus., iv., 11, 
1909, p. 534. 
This series of specimens has led me to question very much 
whether P. dyscrita can properly be distinguished from 
P. anchista, the Japanese species. But after comparing 
specimens of the same size, I have decided not to unite them 
at present. The arm spines in P. anchista are thinner, flatter 
and more pointed than in P. dyscrita. If similar specimens 
of Pectinura should hereafter be found in the Philippines or 
in the East Indies, it would probably result in including the 
