290 PLTJMTJLARIID.T2. 



With open corbulae. 



3. A. MYRIOPHYLLUM, Linnseus. 



" PIIEASANT'S-TAIL CORALLINE," Eflis, Corall. 14, pi. viii. figs. , A. 

 SEIITULARIA MYRIOPIIYLLUM, Linn. Syst. 1309 ; Pall. Elench. 153 ; Esper, 



Pflanz. Sert. t. v. figs. 1-3. 

 AGLAOPIIENIA MYRIOPHYLLUM, Lamx. Cor. flex. 168 ; Agassis, N. H. U. S. 



iv. 358. 

 PLUMULARIA MYRIOPIIYLLUM, LamJc. An. s. Vert. (2nd ed.) ii. 159; Johnston, 



B. Z. 99, pi. xxiii. figs. 4, 5 ; Landsborough, Pop. Hist. B. Z. 



152, pi. ix. fig. 28. 

 PENNARIA MYRIOPHYLLUM, Oken, Lehrb. Natur. 94. 



Plate LXIV. fig. 2. 



SHOOTS clustered, tall, and "eminently plumous," of a 

 yellowish colour, rising from a tuft of tangled fibres; 

 STEM compound, gibbous, or swelling out at intervals 

 into oblong knobs, pinnate, single or slightly branched ; 

 pinnae alternate, set closely together, often of consider- 

 able length, springing from one of the tubes which com- 

 pose the stem, and so nearly in a single line as gene- 

 rally to fold together and appear unilateral; HYDRO- 

 THEC.E rather large, deep, cylindrical, margin very 

 slightly crenated, and rising into a single larger denticle 

 in front; NEMATOPHORES, two lateral, suberect, pro- 

 jecting a little above the rim, one anterior, a curved 

 spinous process, with an orifice at the top, which em- 

 braces the lower portion of the calycle ; GONOTHEC^E 

 produced in pairs on modified pinnae near the base of 

 the hydrothecse, sessile, smooth, " resembling a mussel- 

 shell in shape," protected by a number of long, curved 

 processes denticulated on the outer edge, which arch 

 over them and form a kind of corbula. 



THE stem of this very handsome species (the " Palma 

 marina" of old Barrelier*, the "PheasantVtail" of Ellis) 



* 1714. 



