380 
S.D. Caims 
Genus Trochocyathus Milne Edwards and 
Haime, 1848a 
Trochocyathus philippinetisis Semper, 1872 
Trochocyathus philippinensis Semper, 1872: 253, pi. 
20, fig. 16.—Caims and Zibrowius, 1997: 107- 
108, figs. 10 d-e (synonymy and description). 
New Records 
Soela: stn 02/82/10A, 7: 4 (WAM 49-84), 3 
(USNM 96991); stn 02/82/51, 1, WAM 115-83. 
Lady Basten : stn LB5(s), 19, WAM 26-96; stn 
LB5(t), 1, WAM 454-96. 
Distribution 
Western Australia: continental shelf of 
northwestern coast off Port Hedland; 100-154 m. 
Elsewhere: western Pacific from Ryukyu Islands to 
Banda Sea; 100-268 m (Caims and Zibrowius 1997). 
Trochocyathus apertus Cairns and Zibrowius, 
1997 
Caryophyllia (Premocyathus) compressa - Wells, 1956: 
F422, fig. 323,3. 
Premocyathus compressus - Caims, 1984: 14 (in part: 
Albatross specimens).—Veron, 1986: 605, black 
and white fig. 
Trochocyathus apertus Caims and Zibrowius, 1997: 
109-110, figs. 11 a-d. 
New Records 
None. 
Remarks 
As the synonymy indicates, this species of 
Trochocyathus has been confused with Premocyathus 
compressus Yabe and Eguchi, 1942 by several 
authors. Although their coralla are quite similar — 
both species having curved coralla with an open 
base — T. apertus differs in having a papillose (not 
fascicular) columella and rudimentary Pl-2 as well 
as well-developed P3. 
Distribution 
Western Australia: Veron (1986) illustrated a 
specimen from Point Cloates, WA (20-7230 m), 
which is the only known record from this state. 
Elsewhere: Philippines and Indonesia; 33-70 m 
(Caims and Zibrowius 1997). ?Great Barrier Reef 
(Veron, 1986). 
Genus Paracyathus Milne Edwards and Haime, 
1848a 
Paracyathus rotundatus Semper, 1872 
Paracyathus rotundatus Semper, 1872: 253-254, pi. 
20, figs. 15a, b.—Faustino, 1927: 72-73, pi. 5, 
figs. 13-14.—Cairns and Zibrowius, 1997: 115- 
116, figs 13 d-e. 
7 Paracyathus caeruleus Duncan, 1889: 5, pi. 1, figs. 
10 - 11 . 
IParacyathus merguiensis Duncan, 1889: 6, pi. 1, figs. 
12-14. 
New Records 
Soela : stn 05/82/22, 1, WAM 53-83; stn 05/82/ 
71, 1, WAM 80-83. 
Distribution 
Western Australia: continental shelf off Dampier 
Archipelago; 30-40 m. Elsewhere: western Pacific 
from South China Sea to Indonesia; 18-66 m 
(Caims and Zibrowius 1997); ?Mergui Archipelago 
(Duncan 1889). 
Paracyathus Ifulvus Alcock, 1893 
Figure 4 d, g 
Paracyathus fulvus Alcock, 1893: 139-140, pi. 5, figs. 
2, 2a. 
New Records 
Soela: stn 01/84/54, 3: 2 (WAM 21-85), 1 (USNM 
96993); stn 01/84/109, 1, WAM 693-84. 
Redescription 
Corallum subcylindrical and squat, the 3 known 
specimens all firmly attached to the tip of the 
siphonal canal of a gastropod shell, also encrusting 
the shell with a thin costate, granular coenosteum 
as far as 20 mm from the pedicel. Largest Western 
Australian specimen (WAM 21-85) 12.8 x 11.9 mm 
in calicular diameter and 10.8 mm in height. Calice 
circular to slightly elliptical (GCD:LCD = 1.0-1.12). 
Costae broad (0.8-1.0 nun), slightly convex, and 
covered with small granules such that 4-7 occur 
across the width of one costa near the calicular 
edge. Corallum white except for the SI, which are 
light brown near calicular edge. Septa hexamerally 
arranged in 4 complete cycles (48 septa): 
S1>S2>S4>S3. SI moderately exsert (up to 2.5 mm), 
thick, and extend about 2/3 distance to columella. 
S2 about 1.5 mm exsert and 3/4 width of the SI. S3 
1.0 mm exsert and 3/4 width of the S3. S4 as exsert 
as the S2, each pair of S4 being fused to an SI at 
the calicular edge in a lancetted profile; S4 slightly 
wider than S3. All septa have moderately sinuous 
inner edges and granular (spinose) septal faces. Sl- 
3 bear 1-4 slender paliform lobes, each progressive 
cycle of lobes rising slightly higher in the fossa. P4 
paliform lobes merge with the P3 adjacent to 
columella. All paliform lobes bear oblique carinae, 
merging with the columella toward center of fossa. 
Fossa of moderate depth, containing a well- 
