^30 MR. G. C. BOURNE ON THE GENUS LEMNALIA AND 



tentacles, Avlien at rest, infolded, but not closely pressed against tlie oral disc. There is 

 usually a group of three to four anthocodi;e at the end of each branchlet, but no 

 distinguishable termmal anthocodia. Spicules of the stem and branches of two kinds : — 

 1. Elongate fusiform, with numerous closely-set, small, warty or spinous projections; 

 average length, -6 mm. ; average diameter in the thickest part, '025 mm. ; some of the 

 fusiform spicules shorter and thicker, from -35 to '02 mm. in length by -03 mm. in thickness, 

 sliglitly curved, covered with prominent spiny projections, and presenting every stage 

 intermediate between the ordinary fusiform spicules. 2. Modified double stars mth 

 two elongate rays, measuring from -lo to '08 mm. from tip to tip of the elongated rays 

 and from -025 to 0"15 mm. in thickness. Tentacular spicules flat, scale-like, finely 

 sculptured, varying from -075 X 02 mm. to -OSX'Ol mm. Colour in sjiirit, glistening 

 white. Habitat, Zanzibar. 



5. Lbmnalia terminalis, Quoy & Gaimard. (PI. 40. tig. (J ; PI. 41. tigs. 11, 1(5.) 

 Alcyonum terminale, Q. & G. Voyage de ' rAstrolabe,' Zool. iv. p. 2%2, pi. xxiii. figs. 15-17. 

 LemnaUa terminalis, Gray, loc. cit. 



Anthodete consisting of a short, stout, smooth stem, from the upper end of which several 

 short, stout branches are given off. These form secondary, stoutish, smooth branches from 

 which long, very slender branchlets proceed. Anthocodiie shortly pedicelled, about 

 "6 mm. in diameter ; the tentacles loosely infolded over the oral disc, borne only on the 

 •slender branchlets at rather wide intervals. Diameter of a branchlet about "75 mm. 

 Spicules of stem and branches of tAvo kinds : — 1. Elongate fusiform, with few but 

 prominent spinous projections, those towards the middle generally considerably larger 

 than the others ; length "7 to "3 mm., greatest thickness -04 to -03 mm. 2. Doulde stars 

 with two elongated rays, the latter rather sliort and stout ; length from tip to tip of the 

 elongated rays about '15 mm., greatest thickness about "03 mm. Tentacular spicules 

 flattened, sculptured, generally X-shaped, sometimes with smooth shaft and bilobcd ends 

 covered with warty jirojections (tig. 16), measuring from -065 x '02 mm. to -035 x '005 

 mm. Colour in spirit, yellowish white ; tentacles light brown. Habitat : Port Molle, 

 Queensland ; King George's Sound. 



The specimen in tlie British Museum forms part of the collection made by H.M.S. 

 ' Alert.' There can be little doubt that it is identical Avith the species described as 

 Alcyonum terminale by Quoy & Gaimard from a fragment brought from King George's 

 Sound. 



Douhtfiil Sjjecies. 

 Lemnalia kamosa. 



Alcyonum ramosum, Quoy & Gaimard, /or. cit. pi. xxiii. fig.s. 8-11. 



" Alcyonum magnum, molle, multiramosum, stirpe albicante, fulvo striato, polypis fuscis 

 in extremitate ramorum coadunatis ; teutaculis breA'ibus rotundatis." 

 I think that this form must belong to Lemnalia because Quoy & Gaimard's figures 

 of the anthocodise closely resemble those of L. terminalis. They are further described 

 as follows : — " Les polypes disposes en grappes a Fextremite des rameaux ne rentrent 

 point dans leui" gangue corticale. II n'y a que les tentacules seuls qui se replient sur 

 eux-memes en se fermant comme les petales d'une fleur C'est a I'extremite des 



