New cuttlefishes from the North West Shelf 
297 
Figure 17 A-B, Sepia sulcata Hoyle; A, dorsal view female MV F56919, 96.2 mm ML; B, ventral view, same specimen, 
arrow indicates the position of a ventrolateral ridge. Scale bars 10 mm. 
animals. The dorsal surface of the sepion is 
roughened with calcified projections, but these 
projections are more regular in arrangement and 
shape in the Philippines animal than in the 
Australian species. The Philippines animal was 
collected at 30 m depth, in contrast to the 
Australian specimens found between 426-256 m. 
Until additional specimens become available, 
conspecificity of the Philippines form with S. senta 
sp. nov. remains uncertain. 
Sepia senta sp. nov. differs from all other sepiids 
in the structure of the dorsal side of the cuttlebone, 
with its irregular calcareous projections. Other 
characters are either shared or differ among other 
members of the genus. As discussed in the remarks 
section of S. plana above, until relationships among 
the sepiids are established there is little value in 
comparing differences in individual characters 
between S. senta sp. nov and all other nominal 
species. 
Sepia sulcata Hoyle, 1885 
Figures 9,17-25; Tables 7-10 
Holotype 
Indonesia: Arafura Sea, off Ki Is. - 1M (53.2 mm 
ML), 5°49'15"S 132°14T5"E, 140 fms (255 m), 26 Sep 
1874, coll. W.E. Hoyle on HMS "Challenger", 
(BMNH 89.4.24.77). 
Additional material 
Australia: Western Australia, North West Shelf - 
2F (28.1, 38.1 mm ML), NW of Augustus Is., 
13°51.4'S 123°01.8'E - 13°52.8'S 122°59.0'E, 308-306 
m, 14 Feb 1984, coll. S. Slack-Smith on RV "Soela", 
(WAM 337-86); IF (42.8 mm ML), NW of Collier 
Bay, 14°16.5'S 122°34.4'E - 14°13.6’S 122°38.3'E, 302 
m, 14 Feb 1984, coll. S. Slack-Smith on RV "Soela", 
(WAM 336-86); 3F (57.0-64.1 mm ML), NW of 
Augustus Is., 14°29.4'S 122°01.4'E - 14°28.4'S 
122°03.2'E, 304-296 m, 12 Feb 1984, coll. S. Slack- 
Smith on RV "Soela", (WAM 335-86); 7M (37.8- 
50.6 mm ML) 13F (37.1-65.3 mm ML), 14°35.8'S 
121°49.4'E - 14°37.2'S 121°47.4'E, 304-300 m, 16 Feb 
1984, coll. S. Slack-Smith on RV "Soela", (WAM 
343-86); 6M (42.9-60.0 mm ML) 4F (55.6-66.1 mm 
ML), NW of Cape Leveque, 14 C 49.0'S 121°31.1'E - 
14°50.8'S 121°35.6'E, 302-300 m, 12 Feb 1984, coll. 
S. Slack-Smith on RV "Soela", (WAM 333-86); 4M 
(46.0-52.7 mm ML) 2F (42.8, 60.9 mm ML), NW of 
Cape Leveque, 14°51.9'S 121°40.6'E, 260-256 m, 16 
Feb 1984, coll. S. Slack-Smith on RV "Soela", 
