504 PROF. A. DENDY AND MISS L. M. FREDERICK ON 
36. ECHINODICTYUM BILAMELLATUM {Lamarck) Ridley. 
Spongia bilamellata Lamarck [1813]. 
• Ecliinodictyuin bilameUatum Ridley [1881]. 
Echinonema vasiplkata Carter [1882 B]. 
Kalykenteron elegans Lendenfeld [1888]. 
Kalykenteron sile.v Lendenfeld [1888]. 
Thalassodendron typica Wliitelegge [1901]. 
Echinodictyum bilameUatum Hentschel [1911]. 
Ecldnodictyum elegans Hallman [1912]. 
There is in the collection one beautiful, cup-shaped specimen, 110 mm. in 
height, with a short stalk and very slightly folded walls. The colour in 
spirit of the inner surface is almost black, that of the outside grey merging 
to violet. 
The skeleton arrangement and spiculation agree very closely with those of 
the specimens described by Ridley and Hentschel. 
We liavealso o.xamined two dry specimens of this species from the Dampier 
Archipelago, N.W. Australia, which are in Professor Dendy's collection at 
Kino^'s College, London. These are both cup-shaped with much folded walls. 
Previously known JJistribution. N.W. and W. Australia {Ridley) ; Fre- 
mantle, S.W. Australia {Carter) ; S.W. Australia {Hentschel) ; E. and W. 
Australia [Lendeiifeld) ; E. Australia {Wldtelegge, Hallmann). 
Register No. and Locality. V., Albrolhos Islands. 
37. Anchinoe fictitioides n. sp. (PL 25. fig. 13 ; PI. 26. fig. 13.) 
There are two specimens in the collection, each forming an almost 
continuous, vertical, fan-shaped lamella, with an irregularly indented upper 
margin. The larger specimen (R.N. VI. 4, PI. 25. fig. 13), which measures 
150 mm. in greatest height, 95 mm. in greatest width, and has an average 
thickness of 7 mm., has two conspicuous oval fenestras ; the other specimen 
has only one fenestra. The width of both specimens diminishes gradually 
below to a narrow base of attachment. The colour of the larger specimen 
in spirit is pale greyish j^ellow, that of the smaller light brown ; texture 
fibrous, tough and resilient. The surface is glabrous. 
On both surfaces numerous circular, slightly raised, pustule-like, cribriform 
pore-areas are closely but irregularly scattered. The larger of these pore- 
areas measure 3 or 4 mm. in diameter ; they vary, however, in size, number, 
and conspicuousness in different parts of the same specimen. 
A few small, marginal vents are seen in both specimens. A ramifying 
and anastomosing system of inhalant and exhalant subdermal canals can be 
seen through the thin dermal membrane. 
In the deeper parts of the sponge the main skeleton consists of an irregular 
network of horny fibre cored to a varying extent by smooth megascleres 
(tornotoxea) and echiuated by acanthostyli. Dense fibres, consisting only of 
tornotoxea, ascend somewhat irregularly towards the surface, and the 
radially arranged terminal spicules of these fibres form a fringe round 
