Sponges of Palau, I—Bergquist 
157 
JO mm 
Fig. 18 b. Orina saggittaria ( Sollas ) . Apical view 
of one of the detachable caps from the oscular tubes. 
nate in oscules. None of the latter have been 
observed. Careful study of the pore sieves must 
be done on fresh material since almost all soft 
tissues have fallen away from the fibres in 
alcohol-preserved material. The combination in 
this sponge of reticulate, fibrous, and confused 
skeleton underlines the difficulty of defining 
genera on skeletal pattern. 
Burton (1934) has assigned Gellius angulatus 
var. canaliculata Dendy to this species but, in 
details of the skeleton and the size of the sigmas, 
the description of this sponge does not coincide 
with Sollas’ description or the Palau specimens. 
DISTRIBUTION: Malay area (Sollas); Great 
Barrier Reef (Burton). 
GENUS .Rally pilidion de Laubenfels 
Rally pilidion poseidon de Laubenfels 
Rally pilidion poseidon de Laubenfels, 1954, 
p. 110, fig. 70, pi. IX, fig. a. 
OCCURRENCE: Sta. 67. 
discussion : This species is well described by 
de Laubenfels (1954) and the single specimen 
from the Palaus conforms in detail with the de- 
scription and with the paratype (Bishop Mu- 
seum 169). De Laubenfels (1950) erected the 
genus Neoadocia for N. mokuoloea from Ha- 
waii, a sponge which has adociid construction 
and spiculation, except for the addition of ra- 
phides; the surface of this sponge is mark- 
edly punctate. Neoadocia and Rally pilidion are 
closely comparable; only color and shape sepa- 
rate the two genera. 
DISTRIBUTION: Palau Islands, Marshall Islands 
(de Laubenfels). 
GENUS Pellina Schmidt 
Pellina carbonaria (Lamarck) 
Fig.-19 
Spongia carbonaria Lamarck, 1814, p. 375. 
PThalasyias carbonaria Duchassaing and Mi- 
chellotti, 1864, p. 83, pi. XVII, fig. 4, pi. XIX, 
fig. 2. 
Pachychalina carbonaria Arndt, 1927, p. 152, 
pi. 1, fig. 1, text fig. 13. 
Phloeodictyon carbonarium Topsent, 1930, p. 
26. 
Pellina carbonaria de Laubenfels, 1936, p. 68, 
pi. 18, fig. 5. 
Pellina carbonaria de Laubenfels, 1954, p. 101, 
fig. 63. 
occurrence: Sta. 92, 133. 
DISCUSSION: The two specimens have been 
compared closely with de Laubenfels’ material 
from the same area (USNM 23113 and Bishop 
Museum M. 495) and with material from Ja- 
FlG. 18c. Orina saggittaria (Sollas). Section of the 
sponge showing the spongin coated spicule reticulum 
( lower left), the halichondroid skeleton ( center right), 
and the open spicule reticulum in the subdermal po- 
sition ( upper ). 
