94 
This order is the most extensive of all anil embrace* Streak 
diversities of form, though a similarity of polype. If otbe' 
shores arc equally productive with our own, and many «’il 
be more so, it. will have to be divided and sub-divided into 
small groupes if only for the convenience of study. At p' e 
sent no alteration is required, the system here adopted being 
quite sufficient for the convenience of future investigations. 
VESICULARIAD,®. 
Polypidoms horny, Bstular, confervoid ; cells vesicular 
deciduous, non-opcrculate. 
YESICULARIA. 
Generic Character: Polypidoms rooted, confervoid, Bstular. 
horny, dichotomously branched, jointed at the divisions- 
cells ovate, disjunct, uniserial and unilateral. Poly'P eS 
ascidian. 
SILK CORALLINE. V. Spinosa. Stem erect, compound 
branched dichotomously; cells on one side. PI. xvi'-’ 
fig. 1. 
Conferva marina cancellata, Raii, Synop., vol. I, p. ;,9 ‘ 
Sertularia spinosa, Ellis and SolaDder’s Zooph., p. ‘ 
Stewart’s Elcm., vol. 2, p. 44G. Silk Coralline, Ellis t orn 
p. 20, pi. ix., fig. 17, B. Sertnlaria spinosa, Turton’s L" 1 ” 
vol. 4, p. G82. ' Laomedea spinosa, Lamouroux’s Cor. Fl«*? 
p. 208. Templeton in Mag. Nat. Hist., vol. 9, p. 4GG. 
spinosa, Fleming’s Brit. An., p. 551. 
Hah. On corallines from deep water, off the Deadm a °' 
rare. { 
Confervoid, horny, (istular, and of a semi-transpa^ 
membranous texture ; branched ; branches long and zig 
slender and jointed. It is erect, slender and varies in heig' 
to eight inches. Cells three on each internode, deciduo'H 
their situations in dried specimens are marked by ro« 
apertures. Polypes with eight ciliated tentacula. 
SERI AT, ARIA. Lamarck. 
tU& 
Generic Character: Polypidom confervoid, horny, 
shoots slender, filiform, (istular, and branched; cells [ 
bulous, uniserial, and unilateral, disposed in close pars 1 
companies at regular intervals; polypes ascidian. 
NIT CORALLINE. S. Lendigera. Polypidom dclh'^'j 
branched, spreading; cells in isolated groups, arr» n £' 
parallel to each other, with waved patulous apertm 
PI. xvi., fig. 4, 5. 
Focoides lendigerum capillamenlis Cuscutse instar imp lf - ()t j f 
Raii, Synop., p. 38. Nit Coralline, Ellis’ Coral., P- 
