141 
Esperiopsis giaber nov. sp. 
Perseverance Harbour. Campbell Island. Under stones on the shore bv 
low-water. 8/XII.1914. ^ 
We possess several more or less damaged pieces of the sponge, 
which apparently has been irregularly lumpshaped; rather macer- 
ated, only in a few places the dermai-membrane is preserved; where 
it persists it is seen to be rather 
thick, though pellucid, so that 
the subdermal-cavities are seen 
through it; it is easily peeled off 
^ with a pair of tweezers, perhaps 
‘ on account of the macerated 
‘close to one another at an area, |/ 
which only is a little elevated 20. Esperiopsis giaber, nov. sp. a 
styli; b, chelae; c, sigmata. 
above the surrounding surface of 
the sponge; possibly these latter openings are excurrent canals lead- 
^ing out into a common osculum, but then the surrounding conic 
elevation has disappeared by maceration. The bigger oscula are 4 
mm, the smaller (?) only ca. 1—2 mm in diameter. Ostia? Con- 
■sistence soft, mouldering. Colour graish, fleshy. 
Skeleton consists of fairly well developed main fibres; these 
latter are rather thick, containing many spicules side byside; they 
are running almost perpendicularly towards the surface; they are 
connected with one another by styli at right angles, so that a toler- 
Jbly regular network of rectangular meshes comes up. A special 
iermal-skeleton is found: parallel with and just beneath the sur- 
ace are lymg styli packed very close together, in all horizontal 
lirections. 
Spicules: (fig. 20a—c) 1. styli, bent at about first Vs, here 
hickest, tapering towards the sharp-pointed apex; length 200—370 
by a thickness of up to 10 2. chelae, built as in fore- 
