282 PLTJMULAEJID^E. 



2. A. RAMOSA, Lamarck. 



" LOBSTER'S-HORN CORALLINE, var.," Ellis, Corall. 15, 16, pi. ix. figs, b, C. 



SERTDLARIA ANTENNINA (3, Linn. Syst. 1310. 



NEMERTESIA RAMOSA, Lamx. Cor. flex. 164. 



ANTENNULARIA RAMOSA, Lank. An. s. Vert. (2nd ed.) ii. 156; Hassatt, Ann. 



& Mag. N. H. vi. 168, pi. v. figs. 1,2; Johnst. B. Z. 88, 



pi. xx. 



SERTULARIA SETICORNIS, Hogg's Stockton, 33. 

 ANTENNULARIA ARBORESCENS, Hassall, Ann. N. N. xi. 111. 



Plate LXII. 



SHOOTS rising by a single trunk, which at a certain height 

 divides and subdivides irregularly, and springing from a 

 dense mass of root-fibres ; STEMS thick ; BRANCHLETS 

 long, tapering, slightly curved outwards, much swollen 

 at the base, jointed, the internodes straight and of 

 equal length, arranged in whorls, which are very closely 

 set, so that the stems are densely clothed with the hair- 

 like ranmles ; HYDROTHEC^; small, campanulate, distinct, 

 separated by a single joint; NEMATOPHORES the same in 

 number and arrangement as in the preceding species, 

 except that on the basal portion of the branchlets there 

 are sometimes as many as six, and one is present on the 

 main stem, a little above their origin ; GONOTHEC^E pear- 

 shaped, smooth, single, with a subterminal aperture, 

 facing towards the stem. 



IT is not a little strange that there should have been so 

 much doubt and diversity of opinion amongst authors re- 

 specting the claims of this handsome form to specific rank. 

 Even the " lyncean Ellis " and Pallas were at fault ; and 

 Dr. Johnston, though he separates it from A. antennina in 

 his second edition, seems to have been thoroughly per- 

 plexed, and never to have arrived at a clear conviction on 

 the subject. Hassall, who rightly asserted the distinctness 



