18/6.] AND LITTORAL CORALS. 439 



which are placed before the tertiary septa in perfect systems. Fissi- 

 parity is common in the terminal calices, and they present short broken 

 series. There is no epitheca. Eudotheca tolerably abundant. 



This genus differs from Cladocora in having no epitheca, in the 

 fissiparous division, and in the thickness of the walls. It is distin- 

 guished from Pleurocora, to which it is more closely allied than to 

 any other genus, in its general shape and the fissiparity of the 

 terminal calices ; and it is separated from Goniocora by having pali. 



Dendrocora fissipara, sp. n. (Plate XL. figs. 5-7.) 



The corallum is small and bush} 7 , the branches being slender ; 

 the terminal calices are elongate, and undergo fissiparity by the di- 

 vision of the calice by a large septum. Ordinary calices are round, 

 shallow, with exsert septa, very granular, in vertical lines, and slightly 

 incised ; and the columella has an open reticulated form, with pro- 

 cesses centrally, and pali at the side. Septa in 6 systems, and usually 

 three cycles in each, a fourth never being complete. The pali are 

 before the third septa. The costse are broader than the septa at the 

 calice, and are sharply granular and very distinct. Height of coral 

 2 inches. Breadth of ordinary calice j\j inch, of a series T 4 inch. 



Locality. Off Bonito, West Africa. 4| fathoms. Liverpool 

 Museum. 



Division ASTRANGTACEiE. 



Astrangia minuta, sp. n. (Plate XL. fig. 8.) 



The base is larger than the centre ; and the costse are moderately 

 developed. The calice is very open and shallow ; the columella is 

 well seen, and consists of papillse which resemble those of the smaller 

 septa. The corallite is very short ; and there are three complete 

 cycles of septa, which are short, granular, unequal, arched, and 

 slightly excised. 



Breadth of calice -^ inch. Height of corallum -^ inch. 



Locality. On a reef-coral from the shores of San Domingo. 



ASTRANGIA EPITHECATA, Sp. 11. (Plate XL. fig. 9.) 



The corallum is short, the calices open and shorter than the base ; 

 the fossa is shallow ; and the epitheca comes to the margin. The colu- 

 mella is small, being formed by a circle of trabeculse joining the septal 

 ends. Septa wide apart, unequal, usually long, and in three cycles. 



Breadth of calice -^\, inch. Height of corallum -^ inch. 



Locality. On West-Indian recent reef-coral. 



A group of corals associated with several little Brachiopods of 

 the genus Krausia (probably a variety of Krausia jjersicum), from 

 Port Natal, in South-eastern Africa, presents some interesting results 

 to a careful investigation. The corallites have the aspect of the 

 genus Cylicia, Dana, as they are crowded, spring from a basal ex- 

 pansion, have a well-marked epitheca, deep fossae, and the septal 

 edge concave. At first sight the whole would be associated with 



