Azooxanthellate Scleractinia of Western Australia 
804-84), 3 (USNM 97820); stn 01/84/121, 1, WAM 
793-84; stn 01/84/122, 1, WAM 731-84. 
Courageous: stn 002, 1, WAM 56-84; stn 003, 6: 3 
(WAM 57- and 72-84), 3 (USNM 96988); stn Oil, 1, 
WAM 58-84; stn 013, 2, WAM 59-84; stn 015, 5, 
WAM 60-84; stn 033, 1, WAM 70-84. 
Distribution 
Western Australia: continental slope of 
northwestern coast from Cartier Island to off Port 
Hedland; 394-596 m. Elsewhere: tropical Indian 
Ocean; Indonesia; 183-595 m (Cairns and 
Zibrowius 1997). 
Subgenus Acanthocyathus Milne Edwards and 
Haime, 1848a 
Caryophyllia (A.) grayi (Milne Edwards and 
Haime, 1848a) 
Acanthocyathus grayi Milne Edwards and Haime, 
1848a: 293, pi. 9, figs. 2, 2a. 
Caryophyllia (A.) grayi - Cairns, 1994: 49, pi. 21, 
figs, i-k (synonymy and description).—Cairns 
and Zibrowius, 1997: 97-98, figs. 7 c, f, i. 
New Records 
Soela: stn 05/82/47, 1, WAM 30-85. 
Diamantim: stn 92, 1, WAM 138-83. 
Lady hasten: stn LB5(s), 4, WAM 31-96; stn 
LB5(t), 1, WAM 15-96. 
Remarks 
The specimen from Lady Basten stn LB5(t), 
measuring 23.8 x 16.7 mm in calicular diameter and 
32.5 mm in height, is the largest known corallum. 
Distribution 
Western Australia: continental shelf of western 
shelf off Cape Jaubert and Shark Bay (False 
Entrance); 130-150 m. Elsewhere: Indo-West Pacific 
from southwestern Indian Ocean to Japan; 37-490 
m (Cairns and Zibrowius 1997). 
Caryophyllia (A.) unicristata Cairns and 
Zibrowius, 1997 
Caryophyllia (A.) unicristata Cairns and Zibrowius, 
1997: 101-102, figs 9 d-e. 
New Records 
Soela: stn 01/84/52, 1, WAM 602-87; stn 01/84/ 
65, 4: 2 (WAM 663-84), 2 (USNM 96989). 
Courageous: stn 002, 1, WAM 61-84; stn 003, 2, 
WAM 68-84. 
Distribution 
Western Australia: continental slope of 
377 
northwestern coast from south of Scott Reef to 
southwest of Rowley Shoals; 302-450 m, on soft 
(muddy) substrates. Elsewhere: Arafura Sea; 251- 
477 m (Cairns and Zibrowius 1997). 
Caryophyllia (A.) decamera sp. nov. 
Figure 2 d-f 
Caryophyllia (A.) dentata - Cairns and Zibrowius, 
1997: 98 (in part: seven lots of decameral 
specimens, fig. 8 b, d). 
Records 
DEKI: stn 3, holotype (USNM 96858) and 4 
paratypes (USNM 96849). 
KARUBAR: stn 49, 1 paratype, USNM 96956; stn 
65, 3 paratypes, USNM 96857. 
Soela: stn 01/84/85, 1 paratype, WAM 681-84. 
Umataka Marti: stn 6920, 6 paratypes, WAM 132- 
and 134-84. 
Type Locality 
5°32'S, 132°36'E (Banda Sea, Kei Islands), 245 m. 
Description 
Corallum compressed (GCD:LCD = 1.3-1.4) and 
usually curved 90° in plane of GCD. Holotype 12.5 
x 9.3 mm in calicular diameter and 13.4 mm in 
height. Pedicel small (1.2—1.5 mm in diameter) and 
circular in cross section. Cl-2 low and rounded, 
covered with low, rounded granules. Cl on convex 
thecal edge ridged, bearing 4 or 5 prominent 
spines; one spine also often present on concave 
thecal edge. Corallum light brown. Septa 
decamerally arranged in 3 size classes (10:10:20, 40 
septa). Primary septa highly exsert (up to 2.8 mm), 
each pair forming a rectangular lancet with its 
adjacent tertiaries. Inner edges of primary septa 
moderately sinuous. Secondary septa half width of 
primaries, having very sinuous inner edges. 
Tertiary septa 1/3 to 1/2 width of a secondary, 
having moderately sinuous inner edges. A crown 
of 10 lamellar, highly sinuous pali occurs before 
the secondary septa. Fossa of moderate depth, 
containing a fascicular columella composed of 3-8 
slender twisted elements. 
Remarks 
As noted by Cairns and Zibrowius (1997), several 
specimens they identified as C. dentata were 
atypical in having decameral symmetry. Those 
specimens, combined with additional coralla from 
Western Australia, form the basis of the 
description of C. decamera. To reiterate and amplify, 
C. decamera differs from C. dentata in having: 
decameral septal symmetry, instead of hexameral 
symmetry (i.e., 40 septa vs 48 septa); low, granular 
costae, not highly ridged costae; a tendency to have 
a single costal spine on the concave thecal edge; 
