430 Verrill, Notes on JRacUata. 



•200, -875 by -200, -825 by -200, -700 by -150; the smaller spindles 

 •575 by -1 75, -575 by -100, -550 by -100, -500 by -100, -475 by -100 

 •450 by -075, -425 by '100; the smallest white spindles -135 by -075, 

 •325 by -082, ^175 by •075, 1'75 by -062 ; some of the small triangular 

 ones -450 by -425 ; the irregular prickly spicula -400 by •325. The 

 polyp-spindles measure -375 by -100, -325 by -075, -275 by ^075, -225 

 by -100, -200 by -075, -200 by •062. 



Pearl Islands, brought from 6 to 8 fathoms below low-water mark 

 by divers, — F. H. Bradley. 



Var. miser, 



Corallum dwarfed, forming small, thickly branched, rounded, c;t'S- 

 pitose clumps, from two or six inches in diameter and about the same 

 in height, the siibdiA'ision taking place rapidly from close to the base. 

 Branches and branchlets small and slender, the latter a little enlarged 

 toward the ends, and from •S to 2 inches long. V^erruca? as in the typ- 

 ical form, but smaller, nearly obsolete on the larger branches. Color of 

 branchlets dee}) brown, of branches and often the bases of branchlets 

 very light yellow. Diameter of branchlets "10 to '15; length of long- 

 est verruca^ -04 to 'OB of an inch. The spicula are similar to those of 

 the typical form, but smaller. 



Pearl Islands, in rocky pools at extreme low-water mark, — F. H. 

 Bradley ; Corinto, — J. A. McNiel. 



This species is more nearly allied to M. ecMnata than to any other. 

 Its csespitose growth and far more numerous and smaller branches 

 will iisiially separate it readily. The verruca? are smaller and 

 shorter, and the spicula are different, though quite similar in general 

 appearance. They are mostly stouter and blunter than the corres- 

 ponding forms in M. echiyiata, while the large, stout si^indles of the 

 coenenchyma are decidedly larger, even in smaller specimens. The 

 medium sized spindles are also decidedly stouter and less acute. 



Muricea austera VerrUi, sp. nov. 



Plate VIII, figure 7. 



Corallum large, dichotomous, fruticose, sometimes ca'spitose, with 

 rather thick, obtuse branchlets, covered with close, scarcely appressed, 

 sub-conical verrucse, having an acute lower lip. 



In the largest specimen, several trunks arise from a broad base, four 

 or five inches in diameter. These quickly fork, and the branches in their 

 turn rapidly divide, being, in some cases, five or six times dichotomous, 

 producing a rather coarse csespitose clump, though some of the main 

 branches and their divisions have a tendency to arrange themselves in 



