STYLINACEiE. 29 



Family ASTR^IDiE M.-Edw. & H. (pars). 



As the typical Astrseiclce are not represented in the deep-sea fauna, 

 it would lead too far to attempt a revision of the family or even sug- 

 gestions towards it in this place. 



But one group of genera I have felt justified in separating from 

 the Astraeidge, as I have remarked before, under the head of the Tro- 

 chosmilidffi. It may remain for the present an open question if 

 they ought to form a family by themselves, and if so, what place 

 that family ought to occupy and what other corals might be added 

 to it. 



Most of the Astraeidge described here will be found to be adven- 

 titious, having been drifted from shallow water. 



STYLINACEiE M.-Edw. & H. 

 Galaxea eburnea Poukt. 

 Plate HI, figs. 6 and 7. 



Corallites cylindro-conical. Wall smooth, shining, concave between 

 the very flat cost^e of the two first cycles ; no costae for the third 

 cycle. Calicle regularly dodecagonal ; fossa small and deep. Septa 

 smooth, very little exsert, rather thick, very regular, in six systems 

 and three cycles. Dissepiments few and deeply seated. Height 2 cm., 

 diameter 6 mm. 



This description applies to the only specimen obtained off Havana 

 in 270 fathoms. Although fresh, it had no trace of the peritheca 

 except discoloration for about half the height. Since then I have 

 seen specimens from the collection of Mr. R. Arango in Havana, having 

 four cycles of septa in some of the systems, costae for all the cycles, 

 and cellular peritheca reaching to al)Out one third the height. They 

 were also detached corallites. There is probably but one species, 

 notwithstanding the differences indicated. 



