ALCYONARIA WHITELEGGE. 219 



they appear to be less opaqup than those bearing tubercles, and 

 the spines can be seen radiating from the axial region of the 

 spicule. 



The spicules of the ccenenchyma vary considerably, and may 

 be enumerated as follows : 



(1.) Large, curved or rarely straight, very variable both in the 

 amount of curvature, and the acuteness of the points ; most of 

 those evenly curved, whether boomerang, bow or /-shaped, have 

 moderately sharp points, whilst those unequally curved usually 

 have one end blunt. Size 1-7 by '25, 2-5 by -4mm. 



(2.) Straight, fusiform, equally tapering to sharp points. 

 Size 1-4 by -22mm. 



(3.) Straight, subcylindrical, with rounded ends. Size *8 by 

 15 mm. 



(4.) Large, straight, or curved, fusiform with spines only. 

 Size 1-4 by -22, 2- by 45 mm. 



The cortical spicules consist of : 



(1.) Comparatively smooth fusiform spindles, with small 

 tubercles or spines. Size '45 by '08mm. 



(2.) Straight, spiny, almost cylindrical. Size '35 by '05 mm. 



(3.) Clubs with tuberculate heads and long spiny shafts. 

 Size -2 by -04, -25 by -05 mm. 



The colour is coffee-brown, but this may be due to staining 

 caused by contact with other objects in the cask in which the 

 specimen was preserved. This is highly probable, as a second 

 example which at first sight was thought to be distinct, proves to 

 be the same, or perhaps a variety. 



The colour of the second specimen is pale glaiicus or sage green, 

 the primary lobes are not so high, the secondary lobes are shorter, 

 thicker, and mostly in contact, each lobe being adapted to the 

 shape of contiguous lobes. A small portion of the barren stem 

 is present and exhibits a few longitudinal plications, but it is 

 comparatively smooth to the touch. Other characters, such as 

 the size of the autozooids, their distance apart, the rudimentary 

 siphonozooids, and the spicules, are very similar, and offer no 

 marked points of difference. 



LOBOPHYTUM DEN8UM, Sp. DOV. 



(Plate xi., figs. 4o-A.) 



The colony is 70 mm. long, 45 mm. wide, and 60 mm. high. 

 About half of the sterile column is wanting, the height of the 

 remaining portion varies from 15 to 35mm. in height. The 

 coanenchyma is thickly charged with large spicules, giving the 

 stem when viewed in transverse section a solid appearance, the 

 longitudinal canals are not perceptible to the unassisted eye. 



