680 ' " THETIS " SCIENTIFIC RESULTS. 



fldhellum, though there appears to be a stronger tendency to 

 anastomosis than in the Challenger specimens. The height of 

 the largest colony is 24 cm., with a width of 18 cm. across the 

 expanded portion. 



A small, broken piece of a colony is of a brown colour with the 

 polyps tending to encroach on the middle line of the branch in- 

 stead of being strictly bilateral in arrangement. The spicules 

 here are colourless, and rather smaller than in the orange 

 specimens. 



Previously recorded, from Port Jackson, 30-35 fathoms. 



Family PRIMNOID^. 

 Genus STACHYODES, Wright and Studer. 



■ STACHYODES STCTDERI, Versluys. 



Stachyodes regularis, Wright and Studer, Chall. Rep., Zool., xxxi. 

 1889, p. 55, pi. xi., figs. 2, 2« ; pi. xx, fig. 3. 



Stachyodes studeri, Versluys, Die Gorgoniden der Siboga Ex- 

 pedition, ii. Die Primnoidse, 1906, pp. 94-96, figs. 112-117. 



Stations 15, 42, and 44. 



Three incomplete specimens 11 cm., 23 cm. and 38 cm. in 

 length respectively. On the most slender specimen the polyps 

 occur in whorls of eight to nine ; on the largest there are as 

 many as ten to eleven in a whorl. 



Previously recorded from Kermadec Islands, 600 fathoms ; 

 Celebes Sea (Siboga), 1080 and 1165-1264 M. 



Genus AMPHILAPHIS, Wright and Studer. 



AMPHILAPHIS PLUMACEA, sp. nov. 

 (Plate Ixv., fig. 3 ; pi. Ixviii., fig. 3 ; pi. Ixxiv.) 



Stations 22, 40, 44. 



. This delicate and graceful form bears a certain resemblance 

 to an uncurled ostrich plume. Branching is approximately in 

 one plane, and the branches and twigs show a strong tendency 

 to sweep together in long, drooping curves, Occasionally the 

 branches come off like the barbs along the shaft of a feather, but 

 more generally the branching is dichotomous, or quite irregular. 



