13 
ends do not seem to be reflexed, a feature stated for related forms 
by de Man and S tein er. 
The spicular apparatus is much like that of P. vulgaris , espec- 
ially the spicules themselves; but there is a decided difference 
between the accessory pieces in the two forms. The accessory 
V 
piece in P. vulgaris is almost conical and tapers rather evenly 
towards the tip, in P. Mortenseni it is rod-shaped and somewhat 
curved in its distal end; in this species a peculiar loop is further- 
more seen in its proximal end, formed by a projecting chitinous 
list which is entirely lacking in P. vulgaris. The preanal papillæ, 
the number of which is six in this species, are arranged in two 
groups, one consisting of two, the other of four papillæ. Be¬ 
tween the two groups there is a distance of c. 56 g. The two 
papillæ in the hindmost group are separated 24 g from one an- 
other, and the most caudad of them is 24 p from the anogenital 
aperture. The four papillæ in the second group are arranged more 
densely, only being separated 10—12 /u from one another. 
As remarked above it is beyond doubt that the species in con- 
sideration is closely related to the P. vulgaris de Man from Pen- 
zance in England, but several facts tend to make me at any rate 
provisionally prefer to maintain the Auckland form as specifically 
different from the English species. Firstly the difference in size, the 
English species attaining about one third more in length. Secondly the 
above named differences in the structure of the accessory piece, 
and finally the differences concerning the masculine papillæ; de 
Man does not name the number of these in P. vulgaris but he 
remarks that „les papilles préanales semblent étre situées å des 
distances å peu pres égales“, a feature that does not at all hold 
good for the Auckland species. 
Sabatieria de Rouville. 
Sabatieria tenuispiculum n. sp. 
PI. II, figs. 6, 8. 
Locality: Auckland Islands. North-arm of Carnley harbour. Clay. 
Length: Female 1,8 mm. Male 1,6 mm. 
Female: ci = 44. /S — 7,o. y = 10. 
Male: a — 42. 0 — 8,7. y = 9. 
