10 Thomson. So///// Afr/can (jorgon-tcea. 



The coencnchymc covering the axis is sometimes about i lOth 

 of a millimetre in thickness. 



The sj)icules of the coencnchymc covering the nodes are: 

 (i) straight, curved and kneed spindles, (2) clubs without folia- 

 ceous processes, (3; a few irregular spicules, (4) rods with 

 simple processes, and from the inner axial part, rods without 

 processes. The spindles are from 0.000 x 0.018 to 0.252 x 

 0.072 mm.; the clubs from 0.072 x 0.018 to O.126 x 0.072 mm. ; 

 the irregular spicules smaller than the last; the rods of the 

 inner axial parts, from 0.036 x 0.0036 to 0.108 x o.oi8mm. ; 

 The spicules of the polyps including the calyces and antho- 

 codipe are fairly similar to the above, they appear as a rule to 

 be larger, and some of the straight s[)inclles arc bifurcated at 

 the end. The spindles are from 0.072 x 0.018 to 0.252 x 

 0.054 mm.; the clubs, from 0.072 x 0.054. to 0.198 x 0.054. mm. 

 The spicules of the coenenchyme from the internodes are simi- 

 lar to those of the nodes in shape, except that many of the 

 spindles and clubs having a larger number of and better de- 

 veloped processes. Some of these larger spindles are 0.270 x 

 0.072 mm. in size, and the clubs are about 0.216 x 0.090 mm. 

 The rods without ])rocesses from the axial parts of the inter- 

 nodes are from ac72 x 0.009 to 0.108 x o.OT8mm. The sneci- 

 men in some respects approaches MeUtodes fiahellifera, var. 

 cylindrala, Kiik. 



Locality, etc — Pieter Faurc, No. t8.78S. Ca}>e .*^eal W. 

 by N., \ ^■. 7 miles. By large travvd. Depth. 30 fathoms. 

 Nature of bottom, mud. Date, April 20th, 1906. 



Mopsella singulans sp.n. 



Plate II., Fig. 4. 



Diagnostic Characters. — The polyps have small projecting 

 calcyes. Foliaceous clubs are present. The branching is from 

 the nodes, several branches arise from a prominent encrusting 

 base, which diverge in i:)lanes crossing one another, but in each 

 of these the branching is in one plane. The distinction be- 

 tween nodes and internodes is well marked, the former are 

 yellov/, the latter white, the anthocodic-e yellow. The lower 

 internodes are shorter and stouter than the upper, the unT>cr 

 nodes become correspondingly smaller. The coenenchyme 

 covering the nodes and internodes is rough and granular, due 

 to the slightly protruding spicules. There arc not many polyps 

 on the basal stems, those on the upper branches are mainly 

 arrangc^d in a biserial manner; a few, however, occur on the two 

 remaining sides. The distribution of pohn>s, except on the 

 most apical branches, is rather sparse, and there is some in- 

 terval between them. The polyps are not confined in their 

 origin to the internodes, a number arise from the nodes even 



