46 MADREPORAEIA. 



Group III. -TURBINARI^ FRONDENTES. 



Specimens in which the nearly perpendicular edge of the deep bawl-shaped cup increases in circumference 

 by forming lobes, which may curl imvards round vertiuil axes (Dana's "cucuUatc infolding "). 



Species 22. Turbinaria frondens. 



Gemmipm-a frondens, Dana, Zoophytes, 1848, p. 412, pi. 27, fig. 10. 



Turbinaria frmdescens,* Milne-Edwards and Haime, Les Coralliaires, iii. (1860) p. 1G7. 



Description. — Corallum consists of tliiii erect leaves, here and there lobed, not externally 

 wrinkled. 



The calicles are crowded, projecting, either suljcylindrical or on rounded conical 

 eminences, the aperture from 1 to 1'33 mm. in diameter. Septa 17, fossa deep, ccenenchyma 

 irregular, ridge-and-furrow system. 



In addition to his description of the corallum, Dana gives a coloured figure of a single 

 polyp, with 17 yellow, half contracted tentacles around a green oral disc, the actual edge 

 of the oral aperture being also yellow ; the skin of the corallum appears of a reddish-brown 

 colour. 



This species is represented in the National Collection merely by one small fragment 

 labelled T. frondens by Bruggemann, which may be a portion of a larger growth, but it does 

 not show the projecting calicles of Dana's figure. 



Dana's specimens were from the Fiji Islands. 



a. Samoa Island. Eev. S. J. Wliitmee. 



Species 23. Turbinaria brassica. 

 Gemmipora brassica, Dana, Zoophytes, 1848, p. 413, pi. 29, fig. 1. 



Description. — Fronds erect, very thin and curled round vertical axes (" cucullately 

 infolded "), exterior wrinkled. 



Calicles not crowded, projecting " conico-cylindrically," 1 • 25 mm. in diameter. Septa, 

 according to Dana's figures, 20 to 30, hardly projecting from the margin, and limiting a large, 

 circular, shallow fossa, the walls of which slope slightly inwards towards a well-marked convex 

 columella. 



There is no specimen in the National Collection corresponding with this description. 



Habitat, Fiji Islands. 



* The specific name is given as T. frondescens, but this is apparently a clerical error for 

 "frondens." 



