Ser. CHLOROSPERMES. Fam. Siphonee. 
Prats CCLXI. 
CAULERPA TRIFARIA, Z/arv. 
Gen. Cuar. Frond consisting of prostrate surculi, rooting from their 
lower surface, and throwing up erect branches (or secondary fronds) 
of various shapes. Swhstance horny-membranous, destitute of cal- 
careous matter. Séructwre unicellular, the cell continuous, strength- 
ened internally by a spongy network of anastomosing filaments, and 
filled with semifluid, grumous matter. ructification unknown.— 
Cauterpa (Lame.), from xavdos, a stem, and éptre, to creep. 
Frons ex surculis prostratis hic illie radicantibus et ramis erectis polumorphis 
JSormata. Substantia corneo-membranacea. Structura unicellulosa, cellule 
membrana continua hyalina intus filis cartilagineis tenuissimis anastomosanti- 
bus firmata et endochromate denso viridi repleta. Fr. ignota. 
Cauerpa frifaria ; surculus slender, thinly sprinkled with sharp points ; 
fronds erect, simple, closely whorled with trifarious, setaceous, sub- 
acute, incurved ramenta. 
C. trifaria; swrculo tenui hic illic sparsim echinulato, fronde erecta simplict 
ramentis trifariis setaceis acutiusculis incurvis crebre verticillata. 
Has. Creeping on sand-covered rocks, in tidepools. Port Philip Heads, 
mire, WV, . i, 
Grocer. Distr. South coast of Australia. 
Descr. Sureulus 2-4 inches long, about half a line in diameter, simple or 
branched, copiously rooting, thinly beset with short, scattered or trifarious, 
sharp points, throwing up from its upper surface numerous erect fronds. 
Fronds \-2-3 inches long, sessile or minutely stipitate, linear or linear- 
lanceolate, closely whorled throughout with trifarious ramenta; those near 
the base of the rachis much shorter than the rest, the lowermost dwindling 
into prickles. tamenta setaceous, slightly incurved, cylindrical, subacute 
or mucronulate. Colour rather a dark green, paler towards the extremities. 
Substance membranaceous. In drying it imperfectly adheres to paper. 
PR®PLIO Annan es 
This pretty little species is not very like any other Australian 
Caulerpa, but has so greatly the aspect of C. plumaris, Ag., a 
native of the tropical ocean, that without a close examination, it 
might be mistaken for that plant. It however differs essentially 
