447 
5 b). Shaft siender, generally straight, about the same dimensions 
Il as the anatriaenes, though often somewhat shorter. 3. Oxea (fig. 
I 5 c). Straight, siender, thickest in the middle, tapering towards a 
Sharp point; ca. 2200X24 //. 4. Oxea (fig. 5d). Stout, curved, 
>% 
thickest in the middle, tapering more or less evenly towards the 
Sharp points; varying from ca. 150—800X20—28 // ; length in the 
ectosome commonly about 650 /r, in the dermal tufts about 400 fv; 
a few bayonet-like oxea (fig. 7 e) are seen, perhaps of foreign ori- 
gin, perhaps pathological forms. 5. Curved si 1 i c e u m-t h r e a d s 
(fig. 5 f), up to 3000 fi in length, but may be much smaller; some- 
I times they are assembled in bundles; I regard them as degener- 
i 
■ ated anatriaenes, since anatriaenes are met with, the cladomes of 
I which are very feebly developed, the shaft thin and curved, closely 
; resembling the siliceum-threads. 
Gellius vegius nov. spec. 
(F'ig. 6 a—c.) 
i Three Kings. 65 fathoms. Hard bottom. 5/1.1915. 
; One specimen forming a cake-like expansion with somewhat 
‘ irregular outlines; largest diameter ca. 65 mm, thickness ca. 4 mm; 
' a lobe of the sponge is rising perpendicularly to the main body, 
ca. 20 mm high, 8X14 mm thick and broad. Dermal-membrane 
thin, shaggy from the numerous piercing spicules; big dermal cav- 
ities and irregular canals are seen through it. Oscula numerous, 
only situated at one side of the cake, 0 , 5 —1 mm in diameter; no 
surrounding elevations. Consistence hard, brittle. Colour (formaline) 
greyish, with a reddish tint. 
The skeleton is halichondroid; the spicules are lying pell-mell 
• in every direction, and rather dense, no indication of fibre-formation 
being recognizable; no special dermal skeleton, not even so that 
' the spicules here may lie tangentially, but they are lying in every 
direction, thus making, as before said, the surface shaggy. The 
microscleres are found everywhere in the choanosome; the toxa 
^ are rather scarce. 
Spicules. 1. Oxea (fig. 6a), stout, a little curved, sometimes 
only in the middle, sometimes the curvature may reach over the 
entire length of the spicule; tapering gradually to the elegantly 
; pointed apices, only rarely the oxea are blunt; length varying. 
I 
