60 Proceedings of the Royal Irish Academij. 



colour and horny nature. This sea-shrub sends forth round white eggs, 

 larger than any of the genus. 

 Locality. — Isle of Bourbon. 



Juncella hystrix. 



Juncella hystrix Valenciennes, Comptes Eendus, xli., p. 14. 

 Juncella hystrix Milne-Edwards and Haime, O'orall., i., p. 186. 

 Juncella hystrix Johnson, xix., p. 143. 

 Juncella hystrix Johnson, xviii., p. 506. 



The only description of any importance of this species is as follows : — 

 Stem delicate. Verrucae markedly projecting. 

 Locality. — Bahia. 



Juncella vimen. 



Juncella vimen Valenciennes, Comptes Eendus, xli., p. 14. 



Juncella vimen Milne-Edwards and Haime, CoralL, i., p. 186. 

 Milne-Edwards and Haime describe this species thus : — 

 Verrucae disposed laterally in such a manner that a large distinct 

 non-polyp-bearing median space is left. 

 Locality. — Isle of Bourbon. 



Juncella surculus. 



Juncella surculus Johnson, xviii., p. 506. 

 Juncella surculus Johnson, xix., p. 143. 

 Locality. — Senegal. 



Juncella laevis. 

 1865. Juncella laevis Verrill, xlviii., 1865, p. 189. 

 1870. Juncella laevis Gray, xii., p. 29. 



Verrill's original description is as follows : — 



" Corallum tall, simple, subcylindrical, rather slender, diminishing in 

 size both at the summit and near the base, where the polyps become 

 obsolete. Cells adpressed, scarcely prominent, arranged in two broad 

 bands, leaviny a narrmv, median, naked space on each side, along which 

 there is a well-nuirked groove ; they are placed alternately, at a distance of 

 about one-fifth (-2) inch, in about six vertical rows on each side, pro- 

 ducing a quincunx arrangement ; axis slender, cylindrical, calcareous, white, 

 surrounded by about sixteen longitudinal lobes, two of which are larger 

 and correspond with the lateral grooves ; the others to the rows of polyps. 

 Length of the single specimen, imperfect at each end, 20 inches ; greatest 

 diameter, \ (•25) inch. Colour yellowish-brown, in alcohol." 



