754 iiK. J. STANLEY GABDnTER OX [June 6, 



exotheca. (The Talleys between the calicos are always distinct 

 and usually about 3 ram. broad. They are not closed in below 

 by a deuse, smooth peritheca as represented in Milne-Edwards 

 and Haime's figure, but at the bottom the oostae of neighbouring 

 calices meet. The columella is situated about 1-5 mm. below the 

 crown of paliform teeth, the whole calice being 4-5 mm. deep. 

 Eotuma ; reef. 



5. Oebicella cttrta Dana. 



OrUcella cuHa, Dana, Zooph. p. 209, pi. x. fig. 3 (1846). 



There is in this species always a distinct valley between the 

 calices, but the interthecal spaces are often filled up with dense 

 solid exotheca. The calices have typically 48 septa in four cycles, 

 but usually the last cycle is incomplete. The first and second 

 cycles meet the columella ; the primaries are much coarser than 

 the rest, ending above in broad (1"5 mm.), slightly more exserfc 

 edges, and below having generally small paliform teeth. The rest 

 of the septa are very thin and equally exsert with finely toothed 

 edges. The tertiaries often bend round and fuse with the 

 secondaries before the latter join the columella ; the quaternaries 

 are ah\ays distinct but very narrow. The costae are of equal 

 thickness and meet in the valleys, but are not directly continuous 

 between the calices. The columella is small and formed by twisted 

 lamellffi from the septal edges, which have from the surface rather 

 a papillate appearance. 



The calices in my specimen are rather irregular and a few 

 exhibit well-marked fissiparity. The lai'gest are from 8-9 ram. in 

 diameter by 5 mm. deep. 



Funafuti ; one specimen. 



6. Oebicella coeoxata Dana. 



OrUcella coronata, Dana, Zooph. p. 211, pi. x. fig. 4 (1848). 



There is one specimen of this species, which possesses very 

 markedly the specific characters given by Dana. The calices are 

 crowded, but have nearly always distinct rims ; the costse, however, 

 are sometimes continuous from calice to calice. The septa form 

 three cycles, of which the primaries are considerably (1 mm.) more 

 exsert than the secondaries and the latter than the tertiaries. The 

 costae also show similar differences. The primaries have almost 

 horizontal upper edges, 2 mm. broad, and distinct, small, low, 

 paliform teeth. A few of the secondaries may meet the columella, 

 but generally they are little broader than the tertiaries. The sides 

 of all the septa are coarsely granular and the edges of all end in 

 fine, subequal spines. The columella is very small and formed by 

 a few flat trabeculae from the primary septa. 



The calices vary up to about 8 mm. in diameter by 4 mm. deep. 

 The primary septa are about 2 mm. exsert. 



Tunafuti ; leeward reef. 



