POTTS—POLYCH ZTA : AMPHINOMID. 359 
variability in this respect, and it is clear that care must be taken in diagnosing species 
by this character. It will be useful, however, to give a list of the known species to 
illustrate the variations of serration and indicate the position which the new species 
should occupy :— 
Dorsal sete Ventral sete 
Notopygos crinita, Grube ............ serrated, non-serrated. 
maculata, Kinberg ............ non-serrated. non-serrated ? 
FLODUS LAS NVC lanartastdsasiceer i 53 i 
Parvus,prlas welll eee. secte 4- ; 3 
labiatus, McIntosh ............ 5 serrated. 
megalops, McIntosh ............ serrated. op 
VGH IO” BococnocasegeeneT non-serrated. Pf (in first few segments only). 
OTRATTHISS Sot ec segenagadece baer n i FF, 3 
GRINGO 0% Wonsaescoeorachobnee serrated. s = ts 
It is necessary to comment upon two points with reference to the above. Firstly, in 
most of the specimens examined in this collection serrations occurred only in the first 
few segments. A re-examination of such species as WV. flavus and N. parvus might reveal 
the presence of serrated setz in regions of the body where they had not before been 
looked for. Unfortunately the former accounts do not expressly state in the case of any 
individual species whether serrated sete are found throughout its length or not. 
Secondly, in WV. variabilis some of the examples were searched through for serrated setze 
in vain, and the occurrence or non-occurrence of this particular character appeared to 
be an individual variation. 
5. Notopygos hispida, sp.n. (Plate 45. figs. 6,7; Plate 46. figs. 3-5.) 
Measurements. Varies from 15-27 mm. in length; no. of segments 23-27. 
The body is elongate and slightly fusiform, more pointed at the tail than at the 
head. It is surrounded by a dense fringe of white glassy sete, which in some 
individuals meet over the middle line with those of the other side. The dorsum is 
flattened, the ventral surface slightly curved, while the latter is unpigmented; a 
couple of broad purple bands with a paler line between run longitudinally down 
the dorsum, broadening out at the junction-line of each pair of segments. There 
is also a purple patch in front of each dorsal hunch of sete. 
The caruncle is large, extending backwards to the end of the sixth segment, and 
consists of a median crest and lateral wings, both composed of transverse plications. 
The crest is separated from the wings by a smooth linear pigmented area on each 
side, but it is characteristic of this species that the lax folds of the wings and crest 
often come into contact and obscure the area. The white colour of the plications 
is only relieved by a line of purple pigment down the crest, which sometimes breaks 
into a line of dots. 
The head is transversely oval in shape, with two pairs of large black eyes, sometimes 
almost continuous, and carrying anteriorly a slender median tentacle barely a fifth 
