98 VERRILL, SYNOPSIS OF 



covered with rather small spinuliform granules. Color 

 of the unbleached coral deep yellowish brown. 



Hawaiian Islands. J. D. Dana; Rev. Mr. Baldwin; 

 A. Garret; Horace Mann; W. T. Brigham. 



Var. TUBEROSA. 



One specimen, which I refer with doubt to P. nobilis, 

 .is peculiar in having much larger and more prominent 

 lateral verrucas, which are rounded and often swollen at 

 the end, or even obovate. Towards the base the verrucse 

 are less prominent and even hemispherical. The ends of 

 the branches are enlarged, often lobed, and thickly 

 covered with prominent verrucse. The lateral cells are of 

 medium size, not crowded, with the septa and columella 

 but little developed. Surface between the cells closely 

 granulous. 



Hawaiian Islands. W. T. Brigham. 



A species closely allied to P. nobilis occurs at Zanzibar, 

 of which there is but one broken specimen in the Museum 

 of Yale College. Its mode of growth and form of 

 branches and verrucas are the same, but it has smaller 

 and less crowded cells, and the surface is much less gran- 

 ulous, with finer grains. The septa and columella are 

 little developed, except in some of the cells near the 

 base, where they become more distinct. 



PociLLiroRA M^EANDRINA Dana. 



Zoopli., p. 533, Plate 50, fig. 6, 6a, 6b, 1846. 



The original specimen of this species is in the Museum 

 of Yale College. It is closely allied to P. nobilis, but 

 has mostly broad, plicated and convoluted, short, frond- 

 like branches, with nearly naked summits. The verrucas 

 are rather small and closely crowded. The cells are 

 somewhat smaller than is usual in P. nobilis, and the 

 septa are in general very narrow, or scarcely apparent. 

 The surface is finely granulous. Its resemblance to P. 

 nobilis is so great as to suggest the possibility that it 

 may be only an extreme variety of that species. 



Hawaiian Islands. Rev. Mr. Baldwin. 



