127 
nota than to the oxea. But the structure is much more regular, 
and the fibres very much thinner than in the species in hånd. 
Family Heterorrhaphidae. 
Genus Gellius Gray. 
Gellius irregulavis nov. sp. 
Perseverance Harbour. 10—20 f. Sandy mud. 9/X1I.1914. 
Colonies formed by irregular and anastomosing funnels, there- 
fore rather often irregularly lumpformed. All specimens more or 
less damaged; it therefore has no great interest to know the real 
sizes of specimens in hånd; only to give an idea of the dimens¬ 
ions, it may be stated, that the greatest extension of the biggest 
specimen is ca. 60 mm; diameter of the funnels ca. 10 mm, interior 
diameter of the funnels ca. 4 mm, thickness of walls ca. 3 mm; 
diameter of the oscula also ca. 4 mm, as they are only the simple 
openings outwards from the interior of the funnel. Ostia, not very 
common, ca. 0,5 mm in diameter. Surface very finely hispid. A 
dermal membrane or ectosome could not be made out. Consistence 
very brittle, a little elastic; sponge pellucid, very pale grayish-yellow. 
Skeleton an irregular plexus; one can hardly recognize fibres 
running vertically towards the surface; these fibres contain 2—4 
spicules side by side, connected by irregularly placed secondary 
fibres; the distance between main fibres about the length of one 
spicule. Only very little spongin. 
Spicules: (fig.Sa—b) 1. oxea of the common Gellius-iy^t: slightly 
bent in the middle, tapering from the last Vé to very fine points; 
length 142 by 8 p,. 2. sigma ta, common form, varying much; 
length 15—65 by 0,8—2,? /<; very numerous. A few sigmata 
of extraordinary thickness occur; I think they are pathological or 
Foreign to the sponge, because they are very rare, and because no 
intermediate stages between these and the other normal sigmata 
are found. 
Gellius intevmedia nov. sp. 
Carnley Harbour. Ca. 45 f. Sandy clay. 6/X11.1914. 
Two specimens; conical, rounded base, osculum at the end of 
he conus; oscula 2—3 mm in diameter; the one specimen is 
