452 
Spicules. Oxea (fig. 10), evenly curved in the middle third, 
cylindrical; only the apices are conically set off, very sharp-pointed; 
size rather constantly 260X13 p. 
In external form this specimen resembles R. aquaeductus Schm. 
(15), but it is strongly marked off from that species by the con- 
struction of the skeleton. In its spiculation it also comes near to 
R. clavata Levins. (10) and R. hyalina Ldbck. (12), but the fibres 
are very different in construction. 
Renieva cinevea Grant. 
This cosmopolitan sponge we have from two localities. Port 
Pegasus, Stewart Island, the coast, under stones. 22/XI.1914. Slip¬ 
per Island, the coast, at low water. 20/XII.1914. The length of 
the oxea varies from 125—160 //. 
Renieva scyphanoides Lamk. 
(Fig. 11). 
Spongia scyphanoides Lamarck. Ann. Mus. Hist. Nat. V, 20, p. 437. 
Reniera scyphanoides Lindgren (12), p. 7. 
Off New Plymouth. 8 fathoms. Hard bottom. 12/1.1915. 
This is apparently a very heterogeneous species, and is very pro- 
bably to be divided up into two or three distinet species. Provi- 
sionally I incorporate our specimens into the species, as they all 
fall within the variations given by Lindgren 1909 (12). There 
are three speciniens, erect, hollow cylinders, up to 15 mm high, 
2—3 mm in diameter, walls ca. 0,5 mm thick. White; resembles 
a calcareous sponge. Dermal-membrane very thin. 
Skeleton. The main skeleton consists of densely packed spicula- 
fibres, ca. 60—70 y thick, which support the body-wall, partly run- 
ning parallel with the long axis of the sponge, partly perpendicularly 
to the surface as short thick bundles of spicules. The dermal-skele- 
ton is a one layered reticulation supporting the dermal membrane, 
and resting upon the points of the transverse bunches from the 
main skeleton. 
Spicules. Oxea (Fig. 11), ca. 160x 13^1^; rather stout, cylin¬ 
drical, tolerably evenly curved in the middle part; apices short, 
conical, sharp-pointed. As will be seen, the oxea are here a little 
