190 PEECT SLADEN TRUST EXPEDITION. 



produced. There are usually 1-2 smaller spicules between these main groups. The 

 tentacle-spicules are arranged in a double row, "en chevron"; they are very conspicuous 

 by reason of their bright lemon-yellow colour, while stem, branches, and the rest of the 

 polyp-spicules are a dull maroon-red. Below the " points " of the anthocodia come at 

 least 10 rows of horizontally arranged spicules of the usual spindle shape. The base of 

 this band is sunk in the projecting verruca formed of the coenenchyma spicules : these 

 are more strongly developed towards the outer side of the verruca, and frequently 

 project beyond the polyp-base as a distinct point. 



The spicules of the coenenchyma are long crimson-red spindles of rather slender build 

 and tliiuly covered with comparatively simple warts. The following measurements were 

 taken of length and breadth in millimetres :— 1-36 X '204, 1-1 X -187, -85 X -153. The 

 spindles of the anthocodise are about 'SQX'l? mm. 



This form comes nearest to Siphoiiogorgia mirahiUs as described by Hickson, where 

 he figures the crown " points " in the fan-arrangement described above. In this 

 particular his S. inirabilis differs from the description and figures given by Klunzinger, 

 which we incline to accept as those of the type-species. Tlie polyp-armature also 

 suggests affinities with Kiikenthal's SipJionogorgia minictcea. On the whole, it seems 

 most convenient to include it in the same group with S. mirahilis and S. miiiiacea, 

 but as a distinct species. 



Locality. Providence, 30-100 fms. 



57. Siphonogorgia pendiila, Studer, var. ternatana, Kiikenthal. 



Por description see : — 



Kiikenthal : Alcyonaceen von Trrnate, Abhandl. Senckenberg. Ges. (1896) p. 135, figs. 28 & 29. 



Por description of tS*. p)endula see : — 

 Studer: 'Challenger' Reports, xxxi. (1889) p. 5, pi. 1. figs, la, lb, pi. 5. fig. 2. 



A small, almost complete specimen and a number of fragments may be referred to 

 Studer's Siphonogorgia peiidula, but seem best included under Kiikenthal's variety of 

 that species, ternatana. 



Kiikenthal finds that ternatana differs from »S. pendula proper : " (1) in the branches 

 coming off at right angles, (2) in the absence of furrowing on the branches, (3) in tlie 

 spicules being longitudinal on the branches, (4) in the spicules of the branches being 

 larger than those of the stem, (5) in the polyps arising from the main stem, (G) in the 

 presence in the canal-walls of spicules three times as large as elsewhere." 



The specimens in this collection agree with Kukenthal's diagnosis except in a few 

 minor points. Thus, while it is true that the spicules of the branches are larger than 

 those of the stem, if we take into consideration only the lower part of the stem, this is 

 not the case as regards the polyp-bearing region. Again, the spicules of the canal- 

 walls seem rather smaller than those elsewhere. 



The polyp-armature is of the characteristically simple pendula type, i. e. eight points, 

 each formed of a single convergent pair of spindles, and below these a rather shallow 

 " crown," only a few rows deep. 



