496 THE STOLONIFERA AND ALCYONACEA 



3. Telesto rupicola, Miiller (PL L., Figs. 1, 2). 



There is one specimen of this species, the upper portion of which is thickly 

 covered by a commensal sponge through which only the polyp's tentacles protrude. 

 The branches of the basal stolon are from 1-5 — 20 mm. in length by 1 mm. in 

 diameter. 



There is one main axial polyp, iiO mm. long by 2 mm. in diameter. It bears 

 three secondary axial polyps, all on the same side ; the first 18 mm. long is borne 

 52 mm. from the base of the axial poh"p ; 64 mm. above this is the second, 8 mm. 

 long; the third is 8 mm. above the second, and is 16 mm. long. 



The axial Tpolyp also bears lateral polyps at intervals of from 2 — 4 mm.; they 

 are irregularly placed round the axis. The stolon bears several independent polyps, 

 and the secondary axial polyps bear tertiary polyps (Fig. 1). 



The expansible portion of the polyps is 5 mm. long (the tentacles being 3 mm. 

 long)'. There are no spicules in the tentacles but there are eight small groups of 

 a few narrow spindles extending from the bases of the tentacles a short distance 

 down the polyp. The body wall of the non-retractile part of the polyp is filled 

 with spicules. All the polyps are expanded in the specimen. The primary and 

 secondary axial polyps are of the same type. The cal}'x walls are marked by eight 

 longitudinal grooves. 



The spicules are long, narrow, spiny spindles, often branching at one end, thus 

 becoming Y shaped (Fig. 2). 



The spiny spicules are "607 mm. x "11 mm. — '22 mm. x '092 mm. (including the 

 spines) ; the branched forms are : — the main stem "368 mm. by '092 mm., one branch 

 '092 mm., the other "184 mm.; from the tip of one branch to that of the other, 

 •276 mm. 



The spicules are colourless. The colony is brownish-white in colour in spirit. 



Habitat. Blanche Bay, New Britain. Depth, .50 fathoms. Previously recorded from 

 the coast of Brazil, and Bahia (19). 



4. Telesto arthuri, sp. nov. (PI. L. Figs. 3, 4. PI. LI. Fig. 12). 



A single specimen, incomplete at the base, differs in such a marked degree from 

 any species of the genus that bas been described that we have found it necessary 

 to constitute for it a new species, which we propose to name after its discoverer, 

 Dr Arthur Willey. 



There are three branches in the specimen (Fig. 3), the longest being 55 mm. in 

 length and 4 mm. in diameter. Numerous polyps contribute to the substance of each 

 branch ; the difference in this respect between our new species and Telesto rupicola 

 being very striking, as ma}- be seen by comparing Figs. 1 and 3. The portions of 

 the polyps which project from the branch are arranged in an irregular spiral, and 

 each one inclines to the branch at an angle of 45°. • The projecting portion of each 



' The necessity for the introduction into the literature of the Alcyonaria of some term to express that 

 part of the polyp which can be expanded and retracted is obvious. Mr G. C. Bourne has proposed in a paper 

 read before the Linuaean Society to call it the " Anthocodia," but as Mr Bourne's paper is not yet published 

 we do not intend to adopt it here. 



