194 PEECY SLADEN TRUST EXPEDITION. 



(3) The small yellow spicules of the tentacles are short, thick spindles and club-like 

 forms with a few spines, from -ITX'OS to about •25X'07 mm. 

 Localities. Providence, 50 and 75 fms. ; Amirante, 39 fms. 



62. Siphonogorgia harrisoni, sp. n. (Plate 14. fig. 1.) 



A broken stem with several branches, about 9 cm. high, with a maximum diameter 

 of 5 mm. 



The branches are arranged without definite order and terminate bluntly. 



The stem itself is perfectly cylindrical and relatively smooth ; the branches, on the 

 other hand, tend to be compressed and rather deeply furrowed. Near the base of a 

 branch, seven canals can be clearly distinguished in cross-section, four somewhat larger 

 than the others. In the stem the lumina of the canals are encroached on by the 

 numerous spicules, which form the bulk of the stem. There is a central canal with 

 small, relatively inconspicuous canals round about it. The strong development of the 

 spicules gives the whole stem a very compact, resistant character. 



The twigs, branches, and upper portion of the stem all bear the polyps, which are 

 retractile into distinct, spirally arranged verrucse. These are from 2-3 mm. apart along 

 the branches, but are clustered in groups of 5-6 at the tips, giving these a swollen 

 appearance. 



The anthocodiae show the usual eight " points," rising from a horizontal zone of six 

 rows of spicules. Each point consists here of 3-4 convergent pairs of small orange- 

 yellow spindles (•42X'05 mm.). 



All the other spicules of the colony are long, pale yellow-brown spindles with 

 prominent slightly tuberculate warts. 



Over the surface of the stem these spicules are arranged transversely and longi- 

 tudinally in an irregular feltwork, but on the branches they are strictly longitudinal. 



The dimensions of the larger sinndles are, in millimetres, 1-53 X "23, 1-44 X '25, 

 1-05 X -13, and of the smaller, less warty spindles, -85 X -1, -64 X '06, •51- X 02. 



Locality. Providence, 50 fms. 



Genus STEREACANTHIA. 



63. Stereacanthia indica, Thomson and Henderson. 



For description see : — 

 Thomson and Henderson : Aleyonarians collected by the ' Investigator ' in the Indian Oeean, part i. 

 (1906) pp. 13-15, pi. 5. fig. 2, pi. 9. fig. 19. 

 Several small specimens, some of which are evidently young, seem to be referable to 

 this species. 



Localities. Salomon, 60-120 fms. ; Providence, 78-50 fms. ; Amirante, 20-44 fms., 

 35 fms. 



Previously recorded from the Andamans, 270-45 fms. 



