Ser. RuoposPERME. Kam. Ceramiacee, 
Pirate CCXCI. 
CROUANIA WATTSII, Zarv. 
Gun. Cuar. Frond nodoso-articulate, alternately decompound, consisting 
of an articulate, monosiphonous, primary filament (or aais) emitting 
at the nodes densely whorled, minute, dichotomo-fastigiate, free, arti- 
culated ramelli. Fructification: 1, solitary subterminal /avedle, sur- 
rounded by ramelli; 2, external triangularly-parted ¢etraspores, borne 
on the ramellii—Crovanta (J. 4g.), in honour of the brothers Crouan, 
of Brest, celebrated among French Phycologists. 
Frons nodoso-articulata, alterne decomposita, e filo primario (axi) monosiphonio 
articulato ramellos minutissimos dichotomo-fastigiatos articulatos verticillatos 
ex nodis emittente constituta. Fruct.: 1, favelle subterminales, solitaria, 
inter ramellos abscondite ; 2, tetraspore triangule aut transversim divise, ad 
ramellos lateraliter affixe. 
Crovanta Wattsii; frond cartilaginous, thickly corticated throughout, 
opaque, distichously bi-tri-pinnate; pinnze and pinnules alternate, 
close, horizontally spreading, whorled at the nodes with minute, di- 
chotomo-multifid, four-ranked, articulated, mucronate ramelli; arti- 
culations of the ramelli one and a half as long as broad; tetraspores 
globose, sessile. 
C. Wattsii; fronde cartilaginea strato cellularum erasso-corticata opaca distiche 
bi-tripinnata ; pinnis pinnulisque alternis crebris horizontaliter patentibus ad 
genicula verticillatim ramellosis, ramellis minulis dichotomo-multifidis tetra- 
stichis articulatis mucronatis, articulis ramellorum diametro sesquilongioribus, 
tetrasporis globosis sessilibus. 
Crovuania Wattsii, Harv. in Herb. T. C. D. 
Has. Cast ashore at Warnamboul, rare, H. Watts, n. 221. 
Geroer. Distr. South coast of Australia. 
Descr. Root not seen. Frond 2-3 inches long, about 2 inches in the spread 
of the branches, perfectly distichous, with a pyramidal outline, the lowest 
branches being longest and most compound, the upper gradually shorter. 
Principal stem undivided, percurrent, closely pinnated throughout with alter- 
nate, horizontal, lateral branches, opposite the base of which is frequently 
developed a small simple or pinnulated ramulus. Branches (or pinne) bare 
of pinnule at base for nearly one-third of their length, thence to the summit 
closely pinnulated or bipinnulated, the larger most. compound, the upper- 
most scarcely pinnulated save just at the summit. very part of the frond 
is closely whorled with minute quadrifarious ramelli, the whorls touching or 
nearly touching. These vamelli are bipartite, each half many times dicno- 
