46 BULLETIN OF THE 



diameter, arranged in simple longitudinal series on the edges of the branch' 

 lets, deep at the. eentre, with a minute slender columella, which is often 

 wanting; septa twelve or fourteen, a little exsert, about one third as broad 

 as the cells. Color, light red, with small irregular spots of white ; >ides of 

 the branchlets thickly covered with small Yerrucie. — U]K)!u, Navigator 

 Islands ; J. D. Hague. 



Distichopora nitida Vekkill. 



Corallum (labelliform, branehing diehotomotisly in a plane. Branches 

 round or flattened transversely ; the branchlets obtuse, often compressed at 

 the tips ; surface very minutely granular, appearing almost smooth, with 

 scattered patches of rounded verruca?, having rudimentary septa and pits 

 surrounding them, and therefore probably corresponding to the enlarged 

 columella? of cells without solid walls. Three rows of minute pits are 

 arranged closely in regular scries along the edges of the branches; those 

 of the central, larger row are circular and often have a slender columella 

 in the centre. The lateral ones are much smaller, and generally irregular 

 in form ; a transverse section shows that the central pits correspond to the 

 central open space in the cells of Stylasto; while the lateral ones are inter- 

 septal chambers, the greater part of which have been obliterated by the 

 thickening of the septa; in some of the cells, twelve septa may be traced. 

 Color bright red, with the tips of the branches yellowish white ; other 

 specimens are light orange. — Ebon Island ; A. Garret. 



Distichopora COCCinea Gray. 18G0. — Australia?; A. Garret. 



Errina aspera Gray, Trans. Zool. Soe. 1835. 



Syx. Millepora aspera, Linx. Ed. XII. 17G7. — Fayal ; Chas. Dabney. 

 An examination of the structure of this coral has convinced me that it is 

 closely allied to Distichopora, and consequently to Sfylaster, the process of 

 filling up the cells being here carried to the last degree. 



Oculina varicosa LeSueur. 1817. — St. Thomas, W. I. ; Dr. G. II. Otis. 

 This species is unquestionably distinct from the next, with which it has 

 been united by Milne-Edwards and Ilaime. It resembles more 0. Peti- 

 vt ri M. Edw. and II. 



Oculina diffusa Lamarck. — Florida; L. Agassiz, G. Wurdemnnn. 



Oculina arbuscula Agassiz, MS., "Rep. on the Florida Reefs, with fig. (un- 

 published). 



Corallum arborescent ; the trunk, arising from a flat, incrusting base, 

 divides rapidly into spreading, round, tapering branches and branchlets. 

 Corallites prominent, arranged somewhat in spiral lines; cells large (.06 

 inch), open, deep ; septa in three cycles well developed, the principal ones 

 exsert, rounded at the summits, vertical within ; columella little developed. 



