n. n: \\oxiDA. 47 



Tin- u|>|HT surface alone shows the arculatcd appearance beluw the dermal mem- 

 brane, tin- un<ler surface being nearly opaque. 



A second specimen is conico-cylindrical in shape, 11 cm. long and 3 cm. in 

 diainet* T. the lower end being broken off. This specimen also apparently lay on the 

 IM.MOMI :il..ni: |'.>rt of its length, as the pore surface extends all round only at the 

 upprr en.l of the specimen. 



\ thinl >]MM iiin-n from Coulman Island is fan-shaped, 7 cm. high, 3'5 cm. thick, 

 7 cm. l'r-M-1 ai tln> iip|>cr edge, and 3 cm. broad at the base, where it is attached to two 

 -in.ill -tours. Tli. -in laee is quite worn away, and the body of the sponge full of debris. 



An "an-ola" with it* central node (the end of the main fibre) and lateral 

 branchlet* occupies on an average an area of 6 x 4 mm. 



Tlti- ends of the main fibres are arranged in linear scries. 



Tin- dermal membrane is separated al>out 3 mm. from the floors of the large 

 sub-dermal spaces, and the band-like supporting pillars are al>out 2 mm. broad. A 

 vertical section gives the appearance of a miniature "hall of a thousand columns." 

 The dermal membrane on the under surface of the sponge contains scattered ozcas 

 arranged tangentially. 



The pores vary a good deal in size and shape, 1>eing oval or round, and 45-120 p 

 in diameter. The flagellated chambers are spheroidal, eurypylous, and about 25 p in 

 diameter. The triangular cushion-like shape of the type recalls to mind Gelliu* 

 flagellifer (R. and P.), but there are no flagellate sigmata in the new species. 

 G. rudis (Topsent) has a much firmer and denser structure ; the oxeas are shorter, 

 thicker, and with tornote ends, and the sigmata are more slender and with uniform curve. 



Dredged near Winter Quarters, off Hut Point in 12-20 fms. ; also off Coulman 

 Island in 100 fms. 



GBLLIUS PILOSUS. 



(Plate XVII., figs. 3, 3a, and Plate XXIV., fig. 3a-c.) 

 1907. QMutpilonu Kirkpatrick (10m. p. 287). 



Sponge in form of an erect flattened triangular or elongate lamella divided or 

 digitate at the upper edge. 



Consistence soft, fleshy, compressible. 



Colour in spirit, dirty white or very pale yellow. 



Surface finely conulose and pilose owing to the projection of the ends of the main 

 skeleton fibres about 1 mm., the conules being about '6 mm. apart from each other. 



A few oecules about 1 mm. in diameter, on a level with the surface. 



Skeleton formed of slender main axial fibres on an average about 2-5 spiculea 

 thick, curving out to the surface where they form the pile, and of secondary fibres, 

 usually one, but sometiui.-- tw.. or three spicules thick, at right angles to the main 

 ones, with which they form oblong scalariforni nv -In -. Spongin well developed at the 

 nodes of the network. 



rou rr. 2 O 



