528 ME. G. C. BOUENE ON THE GENUS LEMNALIA AND 



in which tlie anthocodise are pedicelled and borne at irregular intervals on the branchlets 

 so as to form a raceme. They may be described as follows .- — 



A. AnthocodicB suhsessile, arranged in spikes. 



1. Lemnalia Jukesii, Gray. (PI. 40. fig. 1 ; PI. 41. figs. 7, 12.) 



Lemnalia Jukesii, Gray, Ann. & Mag. Nat. Hist. 1868, ii. p. 442. 



Anthodet^ a broad and short stem fixed by an expanded base ; the stem divides into 

 several thick branches, from wliich the branchlets bearing anthocodia? ai'e given off. 

 Both stem and main branches devoid of apodeta?, marked by longitudinal ribs representing 

 the superficial anthosteles. Usually a terminal anthocodia on each branchlet, below 

 which the other anthocodise are arranged in obscure double rows. Anthocodise prominent, 

 of equal diameter to the anthosteles from which they spring. Spicules on the tentacles 

 and pinnules flattened or slightly rounded, scale-like, clavate, or irregular, w'ith finely- 

 sculptured surfaces ; measuring from '02 to "1 mm. in length (fig. 12). Spicules of the rest 

 of the anthodete of one kind : elongate, fusiform, with few inconspicuous w^arty pro- 

 jections, interlaced in an open feltwork on stem and branches, arranged somewhat 

 en chevron at the bases of the tentacles, wdiere they form a rudimentary anthopoma, 

 when the tentacles are infolded, approaching the condition in Siijlionogorgia. Length 

 of fusiform spicules "4 to '1.5 mm.; breadth about •01.5 mm. Colovu' in spirit: — Stem 

 and branches light brown, tentacles deep brown, the colour of tlie latter partly due to 

 their peculiar spicules. Diameter of anthocodia; with infolded tentacles about -6 mm. 

 Habitat unknown. 



Gray's figure gives a very fairly accurate representation of the general habit of this 

 species. It is readily distinguished from others by its brown colour deepening to dark 

 brown on the tentacles, and by the fact that the spicules of the stem and branches are 

 all of one kind and more loosely interlaced tlian in other species. 



2. Lemnalta ehabdota, sp. nov. (PI. 40. fig. 2 ; PL 41. figs. 8, 13.) 



Stem of the anthodete narrowest at the base, widening gradually upward and dividing 

 at about half the height of the whole anthodete into three stout bi'anches, whicli 

 almost immediately subdivide into secondary branches bearing a few short branchlets. 

 Anthocodiae suhsessile, not projecting far from the surface of the branch, distributed over 

 the secondary bi-anches and their branchlets in somewhat alternate rows, closely 

 approximated at the distal ends of the branches and branchlets, more widely separated 

 in their proximal parts. The branches and branchlets incurved towards the centre of the 

 anthodete, their tips stout, bkmtly digitiform, each ending in a terminal anthocodia 

 larger than the lateral anthocodise. Average diameter of the distal ends of the branches 

 1"75 to 2"0 mm. Average diameter of a terminal anthocodia "75 mm. ; of the lateral 

 anthocodise '5 to "6 mm. Spicules of the stem of two kinds: — 1. Elongate fusiform, 

 varying m length from "25 to "75 mm., and in diameter from "035 to "025 mm., covered 

 with more or less prominent warty spines, which tend to fuse together towards the middle 

 of the spicule to form two or more collar-like thickenings (fig. 8 a). 2. Irregular spicules 

 derived from four-rayed double stars, one ray of each star produced into a long spinous 



