58 



MR. J. T. .TOHNSON ON THE 



[Jan. 17, 



the south, it has never yet been discovered at Madeira. But it is 

 not impossible that the dredges of the Prince of Monaco may 

 ah'ght upon its lurking-place when his well-equipped exploring 

 yacht comes to work over this part of the bed of the Atlantic. 



1. Pleueocorallium teicolok, sp. nov. (Plate VII, fig. 3.) 



Branching subalternately in one plane to the fourth degree of 

 subdivision ; branches flexnose, not coalesciug. elliptical in section, 

 attenuating upwards, the ultimate branches slender and ending 

 in points. Axis hard, white, its surface smooth. Cortex pale 

 yellow, granulated. Polype-cells pale A'ermilion-red, very promi- 

 nent, subpedicellate, ovoid or subcorneal, 2-5-3 millim. long, less 



Plenrocorallinm tricolor. 



than 2 millim. in diameter. The upper part is divided into eight 

 upright lobes standing round the orifice in a close circle. The 

 cells are numerous and are irregularly scattered on the anterior 

 face of the branches ; the ultimate branchlets have usually two, 

 sometimes three cells at their tips. (The cells are shown about 

 2^ times the natural size in the accompanying figm-e to the left.) 



