STYLINACE^. 29 



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



As the typical Astra3ida3 are not represented in the deep-sea fauna, 

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

 gestions tow.ards it in this place. 



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

 the Astra?ido3, as I have remarked before, under the head of the Tro- 

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

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

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

 to it. 



Most of the Astr«?id£e described here will be found to be adven- 

 titious, having been drifted from shallow water. 



STYLINACE^ M.-Edw. & H. 

 G-alaxea eburnea Pourt. 

 Phite III., figs. 6 and 7. 



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

 the veiy flat costas of the two first cycles ; no costas 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 fii thorns. 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, costte for all the cycles, 

 and cellular peritheca reaching to about one third the height. They 

 were also detached corallites. There is probably but one specie.s, 

 notwithstandino- the differences indicated. 



