18 
Desmodora de Man. 
Desmodora aucklandiæ n. sp. 
PI. I, figs. 8, 9. 
Locality: Auckland Island. North-arm of Carnley harbour. Clay. 
Length: 1,3 mm. a = 31,2. ft = 8 , 2 . y 13. 
Of this species only three females were obtained, none of which 
seem to be fully sexually developed. It appears to be a rather 
small form, almost of the size of Desmodora scaldensis de Man 
to which it is probably closely related, though it differs from this 
species in some important respects. Its shape is rather siender; 
the body is somewhat expanded in the æso- 
phageal region, behind which it tapers. In the 
ovarial region it is rather considerably expan¬ 
ded so that it recalls the Chætosomes, a like- 
ness which is made the more conspicuous 
through the habit of these animals to keep their 
bodies more or less bent. Behind the ovarial 
region the body tapers again. The tail is some¬ 
what differing in shape from that of Desmo¬ 
dora scaldensis; in this latter it tapers rather 
evenly from the anal aperture to the tip, in 
D. aucklandiæ it tapers evenly to about three 
fourth of its length from the anus, then it be- 
Fig. 12. Desmodora 
aucklandiæ; head. gins to taper more quickly unto the tip. 
The cuticle is coarsely annulated and the 
annulation is the most pronounced in the foremost part of the body, 
the intervals between the striæ being larger here. 
The head is provided with a ring of scarcely perceptible pa- 
pillæ and with two rings of bristles, one of which is found in 
front of the papillæ. The number of the bristles in this ring is, 
as far as I have been able to ascertain, only four, situated sub- 
laterally, and the number of the papillæ is presumably six; of 
these latter two are situated laterally and the others subventrally 
and subdorsally. The hindmost ring also consists of four bristles 
and is found near the hind-edge of the head. Other bristles are 
found on the neck somewhat behind the head (fig. 12 ), but for the 
rest the body seems to be devoid of hairs. 
The lateral organ is spirated, rather small and of a shape 
somewhat different from that of D. scaldensis ; the outmost loop 
