R. W. H. ROW—REPORT ON THE SPONGES: NON-CALCAREA. 329 
of 10mm. They only occur on these upright processes, being entirely absent 
from the basal portion of the sponge. 
The complete specimen measures 120 mm. in length, 60 mm. in breadth, 
and is 35 mm. high from the base to the top of the highest tube. 
~The colour in spirit is yellowish white. 
The sponge is very fragile, being very easily broken at any point. 
The skeleton, both in arrangement and in the spicules comprising it, is 
typical of the species. The sigmata, as in the type, are rather scarce, fairly 
large, and of the usual shape. 
Locality. Along the 5-fathom line in the north-west part of Suez Bay. 
Distribution. Red Sea ; Port Jackson, Australia. 
Sub-Family HETEROXYIN#. 
Haploscleridze with a dense cortex composed of radially arranged megascleres. 
Megascleres oxea, some of which may or may not be spined. Microscleres 
present or absent. 
This diagnosis has been slightly altered from Dendy’s original one (11) to 
admit of a new genus, Anacanthea, being placed in it. The position of the 
group is rather unsatisfactory, especially as the general character of the oxea 
approaches much more nearly to the Axinellidee than to the Haploscleride, 
as it also does in the presence of trichodragmata in some species. 
I have, however, left it in its original position, as I do not feel that a single 
specimen justifies its removal. 
ANACANTHAA, N. gen. 
Heteroxyinee-in which the oxea are not differentiated into two forms, and 
without spines on them. ‘There are no microscleres. | 
The present genus has been created for the reception of a single specimen, 
showing very great external resemblance to the genus <Acanthowifer, 
Dendy (41), but whose spiculation differs from this genus in the entire 
absence of spines from all the oxea. The placing of this new genus in this 
sub-family has also been decided on on account of this resemblance ; but the 
sub-family Heteroxyine, as at present constituted, does not seem to have any 
very definite characteristics, save that the megascleres are all oxea. 
ANACANTH#A NIVEA, n. sp. (PI. 38. fig. 17 ; Text-fig. 14.) 
This new species, the only representative of the new genus Anacanthaa, is 
represented by a single rather small specimen. It is in the form of an 
