Azooxanthellate Scleractinia of Western Australia 
395 
GCD, a full fourth cycle of 128 septa occurring only 
in the very largest (GCD = 60 mm) F. hoffmeisteri 
but already present in medium-sized coralla (GCD 
36 mm) of F. tuthilli. Also, although found at the 
same depth range, the two species overlap in 
distribution only off western Tasmania, most of the 
records of F. tuthilli being from the Great 
Australian Bight, where F. hoffmeisteri has not been 
collected. 
Distribution 
Western Australia: continental slope of 
northwestern coast from Cartier Island to Port 
Hedland; 302-544 m; soft (muddy) substrates. 
Elsewhere: Indonesia; Kermadec and Colville 
Ridges; off Victoria and Tasmania; 110-646 m 
(Cairns and Zibrowius 1997). 
Flabellum (U.) tuthilli Hoffmeister, 1933 
F labellum tuthilli Hoffmeister, 1933: 7-8, pi. 1, figs. 
3-5.—Cairns and Parker, 1992: 46-47, pi. 16, 
figs, a-c (synonymy and description). 
New Record 
Saxon Progress: stn RP-8, 1, NMV F78389. 
Remarks 
The specimen reported above is the largest 
known, measuring 50.5 x 37.6 mm in calicular 
diameter and 33.9 mm in height, and having 128 
septa. 
Distribution 
Western Australia: continental slope of southern 
coast (Great Australia Bight from Bremer Bay to 
South Australia); 347-550 m. Elsewhere: Great 
Australia Bight off South Australia to western 
Tasmania; 348-824 m (Caims and Parker 1992). 
Flabellum (U.) marenzelleri Cairns, 1989 
Flabellum marenzelleri Cairns, 1989: 57-58, pi. 30, 
figs, a-e (synonymy and description).—Cairns 
and Zibrowius, 1997: 156. 
New Records 
Soela: stn 01/84/54, 1, USNM 96639; stn 01/84/ 
55, 1, WAM 557-84; stn 01/84/87, 1, WAM 684-84. 
Lady: stn RW96-18, 12: 10 (NTM C8080), 2 
(USNM 98512). 
Distribution 
Western Australia: continental slope of 
northwestern coast south of Cartier Island and off 
Dampier Land; 260-348 m. Elsewhere: Philippines 
and Indonesia; 240-390 m (Caims and Zibrowius 
1997). 
Flabellum (U.) deludens Marenzeller, 1904 
Flabellum deludens Marenzeller, 1904: 269-272, pi. 
17, figs. 10, 10a.—Cairns, 1989: 55-56, pi. 29, 
figs, a-f (synonymy and description); 1994: 73, 
pi. 32, figs. d-e.—Cairns and Zibrowius, 1997: 
154-156. 
New Records 
Soela: 02/82/10B, 1, WAM 99-83; stn 01/84/67, 
1, WAM 441-96. 
Distribution 
Western Australia: continental slope of 
northeastern coast from Scott Reef to Port 
Hedland; 348-360 m. Elsewhere: Indo-West Pacific 
(northern Indian Ocean through Indonesia to 
Japan); 106-1035 m (Cairns and Zibrowius, 1997). 
Genus Truncatoflabellum Caims, 1989 
Truncatoflabellum angiostomum (Folkeson, 1919) 
comb. nov. 
Figures 7a-c, 8a 
Flabellum angiostomum Folkeson, 1919: 5, pi. 1, figs. 
1-3.—Not Cairns, 1995: 99, pi. 32, figs, d-f 
(=new species, Caims, in press). 
Truncatoflabellum spheniscus - Cairns and 
Zibrowius, 1997: 165-166 (in part: figs. 23 a-b; 
KH72-1-29 and 30). 
New Records 
Soela: stn 02/82/54A, 1, WAM 36-83; stn 04B/ 
82/71, 1, WAM 344-89; stn 05/82/13, 3: 2 (WAM 
51-83), 1 (USNM 96640); stn 05/82/61, 1, WAM 
76-83; stn 05/82/63, 1, WAM 78-83. 
Dorothea: 64 km W Cape Jaubert, 40 m, 13 X 1962, 
4: 2 (WAM 254-93), 2 (USNM 96643); 57 km SW 
Adele Island, 73 m, 17 X 1962, 3, WAM 255-93; 208 
km ENE Troughton Island, 91 m, 23 X 1962, 1, 
WAM 256-93. 
Kunmunyah: stn BG13, 2, NTM C8000; stn BG27, 
3, NTM C8044; stn BG28, 3, NTM C8045; stn BG39, 
1, NTM C8048; stn BG83, 2, NTM C8026. 
Lady Basten: stn LB3(t), 1, WAM 10-96. 
Lady: stn RW96-5, 7, NTM C8063. 
Other records: Middle Pass, Darwin, 20 m, 28 XI 
1994, 1, NTM Cl2333. 
Description 
Angle of curved, rounded thecal edges 105°- 
200°, but usually about 180°; angle of thecal faces 
15°-25°. Holotype 45.2 x 14.7 mm in calicular 
diameter and 34.2 mm in height, with a basal scar 
4.3 x 3.3 mm in diameter; however, largest known 
specimen (NTM C12333) 63.3 x 19.9 mm in 
calicular diameter and 42.1 mm in height. Upper 
calice strongly arched in a semi-circle; GCD:LCD = 
