Ser. CHLORosPERMEJi. Fam. Siphonacece. 



Plate LXXXIV. 



CAULERPA HYPNOIDES, A^. 



Gen. Char. Frond consisting of prostrate siirculi, rooting from their lower 

 surface, and throwing up erect branches (or secondary fronds) of 

 various shapes. Substance hortiy-membranous, destitute of calcareous 

 matter. Structure unicellular, the cell {frond) continuous, strength- 

 ened internally by a spongy network of anastomosing filaments, and 

 filled with semifluid grumous matter. Fructification unknown. — 

 Caulerpa [Lamx.], from Kav\o<i, a stem, and epirco, to creep. 



Frons ex surculis prostratis hie illic radieantibus et ramis erectis polymorpJds 

 formata. Substantia corneo-membranacea. Structiira unicellulosa, cellules 

 membrana continua hyalina itUusfilis cartilaglneis tenuissimis anastomosanti- 

 busfirmata et endochromate dense viridi repleta. Fruct. ignota. 



Caulerpa Tiypywides ; surculus robust, densely covered with cylindrical, 

 dichotomous scales ; frond erect, stipitate, lanceolate, attenuate, pin- 

 nated ; stipes and pinnae everywhere clothed with forked, cylindrical, 

 obtuse, emarginate and mucronulate, spreading, bright-green ramenta. 



C. hypnoides ; surculo crasso squamulis cylindraceis dicJiotomis dense muricato ; 

 fronde erecta stipitata lanceolata utrinque attenuata pinnata ; stipite pinnis- 

 quefoliolis undique obtectis ; foliolis medio fur catis cylindraceis obtusis apice 

 emarginati^ mucronulatis patentibus Icete viridibus. 



Caulerpa hypnoides, Ag. Spec. Alg. v. 1. p. 443. Ag. Syst. p. 183. Endl. 

 Srd Suppl. p. 16. ffook. Ft. N. Zeal. v. 2. p. 260. ffarv. Alg. Fxaie. Austr. 

 n. 550. 

 Chauvinia hypnoides, Kiits. Sp. Alg. p. 497. 

 Fucus hypnoides, B. Br. in Turn. Hist. Fuc. v. B. p. 93. t. 173. 



Hab. In deep tide-pools, and the vertical sides of reefs, at and below low- 

 water mark. Common along the western and southern shores, and 

 in Tasmania. 



Geogr. Distr. Australia, Tasmania, New Zealand. 



Descr. Surculi extensively creeping, several inches long, 2-3 lines in diameter, 

 rootiDg at long or short intervals, very closely covered with extremely 

 minute, twice or thrice forked scales, so closely set that the surface formed 

 of their points is quite even and velvety. Fronds 10-12 inches or more 

 in length, on a stipes 1-2 feet long, regularly lanceolate in outline, narrowed 

 towards each end, closely pinnate. The stipes and rachis are densely im- 

 bricated with forked ramenta. The pinnae are distichous, simple or rarely 

 forked, setaceous, 1-2 inches long, closely set, patent and somewhat curved, 

 and are clothed with tri-quadrifarious, patent ramenta, forked a short way 



