PROCEEDINGS OF SECTION D. 489 
Callipsygma wilsonis.—Frond expanded on each side above the 
stem, which is apparently rough below and slightly encrusted, 
extending in two directions, sparingly, sub-pinnately, branched 
from the margins. The whole frond is flattened, each branch 
passing into a terminal fan-shaped expansion, at length plumose 
by the lengthening of its own rachis. The lower filaments of 
each expansion somewhat separate, and rapidly passing into fresh 
branches. The filaments composing the whole frond constricted, 
so as to form oblong articulations The filaments of the laminze 
proceeding from the margin of the rachis repeatedly dichotomous, 
placed close together, united laterally. Those of the stipes for 
some distance wavy, alternately superimposed, fastened together, 
thicker near the medial line. 
Udotea peltata——Frond expanded, slightly funnel-shaped, 
peltately attached upon a very short simple stipes, the lamina of 
the flabellate expansion generally somewhat rounded, but 
inequilateral. Margin ragged, or irregularly lobed. Plant green, 
filaments of the flabellum covered by a cortical stratum, 
conspicuous along the margin, rather distant, lower down united, 
the cross filaments passing transversely to the surface of the 
fronds, uncinate and peltate, forming the cortical stratum of tha 
surface. 
Caulerpa alternifolia.—Fronds from a surculum, erect, slender, 
filiform, repeatedly dichotomous, pinnate along their whole length. 
Pinne subulate, mucronate, attenuated from a somewhat thicker 
base, lower pinne generally regularly alternate, spreading, 
~distichous, slightly curved inwards, many times exceeding in their 
length the breadth of the rachis; the upper pinne approaching 
nearer to one another, less regularly alternate. 
FLORIDE®. 
Thamnocarpus glomuliferus.—Frond filiform, elongated, upper 
portion with long branches, branchlets in the form of glomeruli, 
alternately arranged like knots along the branches. Stem and 
branches very distinctly articulated, cortical stratum dense, 
articulations two and a half times their diameter, separated by 
the darker line of the nodes. Ramellisituated at the nodes much 
branched, articulated, the young ramelli rather soft, the older 
somewhat rigid, furnished with a spinelet at the apex and at the 
upper nodes. 
Fructification as yet unknown. 
Cryptonemia wilsoni.Stipitate membranaceous, nearly a foot 
in length, fronds elongated, lanceolate or linear, from the usually 
entire margin scattered proliferous processes, sometimes pinnate, 
at others terminal, digitately spreading from the upper margin of 
a frond apparently injured. Young proliferous leaflets obovate 
lingulate, older ones linear. 
