84 ' ENDEAVOUR " SCIENTIFIC RESULTS. 



The calyx scales are arranged in longitudinal rows, of 

 which the abaxials alone are complete. These consist of 

 three to four relatively large overlapping scales. The adaxials 

 are practically absent. The abaxial-laterals are reduced to 

 about one small scale. The operculum is a well defined 

 sharp cone formed of eight rather high isosceles triangles, 

 which bear on their inner surface a well marked keel or 

 ridge. The abaxial pair is the largest ; the adaxial pair 

 is very small and lies bent under the other opercular 

 scales. 



The large swollen polyps differ from the normal ones not 

 only in size, but they have a much lower operculum, and 

 the polyp scales are more numerous. The armature consists 

 of overlapping scales of which there are about five in the 

 abaxial longitudinal rows, and two to three in the adaxial- 

 laterals. 



The calyx scales are broad, shield-like and fan-like, with 

 finely toothed margins, and a well marked excentric nucleus 

 surrounded by tuberculate warts. The relatively clear 

 border of the scale is narrow, and bears strongly marked 

 radiating ridges. The following measurements of the length 

 and breadth of the calyx scales were taken in millimetres : 

 612 x -315 ; -577 x -315 ; -525 x -385 ; -455 x -332 ; -367 x 

 350; -332 x -437. The eight opercular scales are of very 

 unequal size -525 x -210mm. ; -490 x -192mm. ; -402 x 

 192mm.; -350 x -210mm. ; -280 x -140mm. They are 

 sharply pointed isosceles triangles with a strong median 

 ridge. Numerous small warts are grouped along the sides 

 of the ridge. The border is relatively broad and bears a 

 number of jagged projections. The margins of the two 

 long sides of the scale are minutely dentate. 



The spicules of the coenenchyma are rather large scales, 

 oval, fan-shaped and triangular, closely studded with tuber- 

 culate warts, and without a clear border. The following 

 measurements were taken : -490 x -332mm. ; -437 x-341 

 mm. ; -420 x -350mm. ; -385 x -332mm. ; -315 x -297mm. 

 A few oval to spherical bodies covered with warts are also 

 present- -192 x -175mm. ; -175 x -175mm. ; -122 x -122mm. 



The colour of the colonies is creamy-white ; the axis is 

 greenish-bronze to black, and bears fine longitudinal 

 striations. 



Locality. Fifty miles south of Cape Wiles, South Aus- 

 tralia, 75 fathoms. 



