KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 59. N:0 |. 9 



sometimes appear. Septa of the fourth cycle fuse with those of the third, and these 

 a^ain with those of the second cycle. Columella concave with a rough surface, which 

 seems sometimes to be almost compact, and in other cases to consist of calcareous rods 

 and plates. 



The great difference in height of septa of different cycles, the steepness of the 

 primary and secondary septa, and the very dark colonr of the colnmella give a charao- 

 teristic appearance to these specimens. 



d 45 miles W.S.W. off Cape Jaubert, 18.7.11, 140 feet, 1 sp. Figs. 6—7. 



Height of corallum 5,5 mm. Calice slightly elliptical, greatest diameter 6,2 mm. 

 Costae of the fourth cycle are somewhat weaker than the rest and have one line of grannlae 

 onl) T , which are of the same kind as those on the other costae. Many costae grow broader 

 towards the granulated base of the corallum. The intercostal furrows are deep. Septa 

 48, not very exsert, the upper septal margins angularly rounded, inner septal edges 

 of the primary and secondary cycles vertical and entire, those of the other cycles 

 toothed and also rather steep. The septa are distinctly granulated and the different 

 cycles fuse with each other in the usual manner. The teeth of the septa resemble pali, 

 but genuine pali are lacking. In the centre of the calice the septa rim together into a 

 very diminutive columella, which has no papillae. The bottom of calice is grey. 



This specimen agrees well with the description and figure given by Rehberg of 

 his species Heterocyathus pvlchéllus. Gardiner does not state to which of his two types 

 he ref ers this species. For my part, I consider it synonymous with Type II, in view 

 of its having the following characteristics common with this type: the base as broad as 

 or smaller than the calice, costae of two types, intercostal furrows deep and broader 

 than septa, columella slightly developed and deeply situated, inner septal edges toothed, 

 pali very slightly developed or entirely lacking. 



o 42 milos W.S.W. off Cape Jaubert, 10.7. 11, 30 feet, 1 sp. 



f ■• » » • , 9.7.11, 00 » 1 » 



g 1 45 » » , 18.7.11, 140 » 1 » 



1 figs. 8—9. 



Greatest Smallest Height of Coluni9lla Total no. 



diameter of diameter of corallum of septa 



base in mm base in mm in mm 



o 15 13,3 6 slate-grey, very small, surface 



compact and somewhat spiny 67 



f 14,7 13,5 7 white, spongy, 2,5 mmin length 64 



g 13,7 13 7 white, spongy, 3,5 mm in length 64 



The bases, the measurements of which are given above, are much more expanded 

 than those of Gardiner's specimens, and this fact seems to be the principal difference 

 from Type I. Reciprocally these three specimens are of quite analogous appearance. 



K Sv. Vet, Akad. Haudl. baud 59. N:o 1. 



