103 



there are 74 septa, of which 21 are larger and more exsert than 

 the others and divide the calice iuto 21 compartments; of these 

 21 compartments 16 contain three smaller septa each, and 5 

 coutain only one smaller septum. 



The 21 large exsert septa merge with the columella, but just 

 before they do so they are notched, so that at their junction 

 with the columella there is a sort of low paliform thickening — 

 siuuous and very indistinctly paliform. 



Of the 53 smaller septa, the middle one in each group of 

 three gives off, very low down in the calicle, a bold paliform 

 lobe, and then either ruus on to the columella or joins one of 

 the larger septa; while the remaining 37, which are narrow, end 

 on the wall of the calice. 



The columella, which though low is very large and singularly 

 compact, is made up almost entirely of the thickened granular 

 contorted impacted ends of the 21 large septa, with but little 

 assistance from the 16 septa of the next degree. 

 Greatest height of corallum to the summit of the most exsert 



septa about 25 millim. 



Diameter of calicle about 37 » 



19. ? Sabinotrochus fiatiliseptis n. sp. 



Corallum saucer-shaped, with a pedicled scar of attachment, 

 whence radiate costse, which, as well as the furrows between 

 them, are covered with »oolitic" granules. 



Septa in six systems and three cycles with some traces of a 

 fourth. Those of the first two cycles are large and are remarkably 

 inflated and granular in the middle of the shallow calicle, where 

 they meet to form an umbilicated columella. Those of the third 

 cycle sometimes join those of the second, but more often they 

 end about midway between the centre and the circumference of 

 the calicle. 



Height of corallum about 5 millim. 



Diameter of calicle 11 » 



