A. E. Verrill — Corals of the Genus Acropora. 257 



Acropora millepora (Ekr.), and var. squamosa (Brook). 



Madrepora millepora Brook, op. cit., p. 116, 1893. Dana, Zooph., o. 446, pi. 



xxxiii, fig. 2, 1846. 

 Madrepora squamosa Brook, Ann. and Mag. N. H., x, p. 463, 1892; op. cit., 



p. 120, pi. xx, fig. B. 



Brook has redescribed the type of Ehrenberg. He considered it 

 distinct from the M. millepora of Dana, and described, as a new 

 species {A. squamosa), the form that he identified with Dana's. 

 To me, the differences mentioned seem trivial and not of specific 

 value. 



In either case, Dana apparently bad both forms in view when 

 he described his M. millepora. Portions of the types of his 

 species of that name are in the Yale Museum, and also a good series 

 of specimens of this species received from Singapore (coll. Capt. W. 

 H. A. Putnam). 



Sevei-al of the latter agree with the A. squamosa (Brook), but I 

 cannot distinguish them as more than a slightly marked variety of 

 A. millepora. 



I think it probable, also, that A. subulata is only a longer- 

 branched variety of A. convexa. 



Acropora nasuta (Dana) Ver. 



Madrepora nasuta Dana, Zooph., p. 453, pi. xxxiv, fig. 2, 1846. 

 Madrepora nasuta and var. crassilabia Brook, op. cit., pp. 73, 74, 1893. 



One of Dana's types is in the Museum of Yale University (No. 

 2026, and 4187, branches), as well as other similar specimens from 

 different sources. It is the form described as var. crassilabia by 

 Brook. 



This type forms a rounded, convex, thick clump of divergent 

 branches and branchlets, which show no tendency to coalesce or 

 form a basal disk. The marginal branches are divergent, stout, and 

 shorter than the others. In these respects it agrees with Dana's 

 figure, but not with the larger specimen that he described. 



The radial corallites are prominent, compressed, and truly nariform, 

 as well described by Dana. The lower lip is elongated, narrowed, 

 incurved, and decidedly thickened, as in the type of crassilabia. 

 The edge of the lip is usually lacerate and rough. The walls are 

 finely echino-costulate. The calicles are elliptical, with 12 septa, 

 more conspicuous in the immersed calicles of the bases of the 

 branches. Tahiti (Dana). 



Trans. Conn. Acad., Vol. XI. 17 January, 1902. 



