27 
rounded or acute tips. Under low 
power it looks as if this piece of the 
cuticle were covered with hairs and 
quiteshaggy (fig. 6 , PI. III)butseen under 
high power it proves to be covered 
with papillæ of a rather different shape, 
wherefore I find it perhaps misleading 
to call them hairs. Some of these are 
rounded, nearly globular, others more 
lengthened, almost ovoid, some have 
an acute tip and the rest are more or 
less conical, lengthened and hair-like. 
They are most densely crowded in the 
ventral midline, where their shape is 
also most hair-like. ' Their length is 
varying considerably; the longest at- 
tain 12—15 /i. In my opinion there 
can be no doubt that this feature is 
in COnneCtion with the sexual func- pig jg Thoracostoma papillosum; 
tions. It is only seen in the males spicuiar apparatus. 
and is quite unique among freeliving Nematodes. It lends a very 
curious aspect to the body-part in question, which looks as if it 
were covered with a soft fur. The spicules are seen in fig. 19. 
They are in shape somewhat differing from those of T. campbelli, 
and the apophyse of the accessory piece is much larger than in 
this species. 
Thoracostoma aucklandiæ n. sp. 
PI. II, fig. 10. PI. III, figs. 4, 7. 
Locality: Auckland Islands. North-arm of Carnley harbour. Clay. 
Length: Female 12 , 3 . Male 8,5 mm. 
Female: a = 64. ft = 6 ,s. y — 110. 
Male: a — 65. ft = 6 . Y — 87. 
While both of the above described species of Thoracostomes 
were captured in the Campbell Islands, this originates from the 
Auckland Islands. 
As to the shape of the body this form is rather siender, though 
not so siender as T. campbelli. In the front end it is tapering 
rather evenly towards the front, and the head is truncate as in T. 
