SPONGES FROM THE ABROLHOS ISLANDS. 497 
The skeleton consists o£ a somewhat rectangular, imispicular leticulation ; 
towards the outer surface the spicules become concentrated into plurispicular 
fibres running vertically to the surface. 
Spicules : — Oxea ; small, smooth, straight or slightly curved, sharply 
pointed, measuring about 0"23 by 0'008 mm. 
Previously known Distribution. Adriatic (Schmidt, Babiti) ; Black Sea 
( Czerniavshy, Swartscheivsky) . 
Register No. and Locality. VII. 3, Abrolhos Islands. 
25. Reniera cribricutis Dmi?/ [1921 B]. 
There are two specimens in the collection, one (R.N. VII. Ig), the colour 
of which is almost white in spirit, agrees very closely in all respects with the 
type-specimen, except that it is smaller, measuring 25 mm. in length and 
10 mm. in diameter, and has only a single vent, 5 mm. in diameter. 
The second specimen (R.N. VIII. 2) consists of two fragments, lobate in 
appearance, each possessing one large, round osculum, about 4 mm. in dia- 
meter, with a slightly raised margin, opening out of a wide oscular tube. 
This specimen, which is light brownish yellow in colour, does not conform 
so closely to the type, the subdermal cavities being smaller and the primary 
lines of the skeleton less differentiated. We feel justified, however, in 
making the identification. 
The spicules of the Abrolhos specimens are of much the same size as those 
of the type, measuring about 0'14 by 0'006 mm. 
Previously known Distribution. Amirante, Indian Ocean [Dendy'). 
Register JSo. and Locality. VII. Ig, VIII. 2, Sandy Isle. 
26. Reniera peemollis [Bowerhank). 
Isodictya pennoUis Bowerbank [1866, 1874, 1882]. 
Semei-a jiennollis Topsent [1888]. 
Reniera permuUis Dendy [1916 A]. 
We identify with this species seven specimens of an encrusting nature 
which vary considerably in size and general appearance. The surface is 
slightly hispid, and the large subdermal cavities can be seen through the thin 
dermal membrane, which is almost aspiculous. The oscula are small, sinole 
and scattered, measuring up to about 3 mm. in- diameter. The colour in 
spirit varies from light yellowish brown to nut-brown : texture in most cases 
very soft and friable, that of R.N. VI. 17 d and R.N. VI. 17 e firm and 
compact. 
The skeleton arrangement and spiculation agree closely with those of 
specimens from Okhamandal, but the tendency to form primary lines is not 
so strongly marked. 
Previously known Distribution. European seas [Bowerbank, Topsent) ■ 
Okhamandal, Indian Ocean [Dendy). 
LINN. JOURN. ZOOLOGY, VOL. SXXV, 36 
