144 Rev. IT’. Hincks’s Contributions towards a 
following must be inserted :— Avicularia elongate-oval, 
rather large, the mandible rounded, irregularly distributed, 
sometimes placed obliquely above the orifice, sometimes on 
the lower part of the front wall.” 
Ibid. (p. 280). 
Schizoporella biturrita, sp. n. 
Waters identifies this form with Lschara tuberosa, Reuss. 
As I have not had an opportunity of consulting the work in 
which the latter is described, I accept the identification on his 
authority. The leading features of the species are the tower- 
like elevations on each side of the orifice, usually bearing 
avicularia, and the gigantic umbonate ocecium. The position 
of the avicularia, as Waters has remarked, is variable ; com- 
monly they are placed at the back of the “tower,” but 
frequently at the sides, the pointed mandible directed 
upward. In the cells bearing ocecia the orifice is larger and 
has a wider sinus than in those which are not ovicelligerous. 
The oral arch of the ocecium is remarkable for its size. 
The variety in which lateral offsets from the “ towers” 
unite so as to form a bridge over the orifice is much more 
striking than significant. The structural change is very 
slight and trivial, though it affects materially the aspect of 
the species. In all essential characters it agrees entirely with 
the normal form. 
The only specimen of the variety which I possess is from 
Africa. 
At one time I was inclined to regard this species as identical 
with Busk’s “Gephyrophora polymorpha” (‘ Challenger’ Rep. 
p. 167), but the examination of specimens from New Zealand 
has shown that there are most important differences between 
them, especially in the position and structure of the ocecium*. 
It need hardly be pointed out that the bridge across the 
orifice is a character of no generic significance and that the 
genus Gephyrophora must be abandoned. 
The New-Zealand specimens of the latter are of small size 
(less than half an inch in height), erect in habit, the stems 
cylindrical, slightly branched, trifid at the upper extremity, 
the surface smooth and somewhat glossy. The smali pointed 
avicularia are borne on the summit of the lateral elevations, 
the mandible directed outwards. 
* Waters, ‘ Challenger’ Supplement, p. 29. 
