57 



curious and uncommon Zoophytes collected from various parts of the globe, 

 London 1786, p. 127, tab. 7, figs. 6—8, tab. 25, fig. 1. 



Chamsedoris annulata (Lamarck) Mont. Montagne, Troisieme cen- 

 turie de plantes cellulaires exoticjues nouvelles (Ann. des so. nat., IL Ser., 

 t. 18, Octobre — Nov. 1842. Harvey, Nereis Bor.-Am. part III, p. 42, tab. 

 42 B. J. Agardh, Till Algernes Systematik, VIII, Siphoneae, p. 113. 



Nesea annulata Lamouroux, Histoire de Polypiers coralligenes flexib- 

 les, Caen 1816, p. 266. 



Penicillus annulatus Lamarck in Ann. du Museum, t. 20, 1813, p. 299. 



Scopularia annulata Chauvin, Recherches sur I'organisation, la fructi- 

 fication et la classification de plusieurs genres d'Algues. Caen 1842. 



As is well known 

 from the description 

 of Harvey (1. c. p. 42) 

 the thallus of this 

 plant, when fully de- 

 veloped, consists of the 

 nearly cylindrical stem 

 with annular constric- 

 tions from base to top 

 where it ends in the 

 cup-shaped head, giv- 

 ing the whole plant a 

 mop-like appearance. 

 When living the stem 

 has a more or less 

 striking red -violet co- 

 lour and is rather 

 iridescent, the head 

 is dark-green on the 

 outer side lighter grey- 

 green on the upward 

 turned side. 



At its base (Fig. 40) the stem is fastened to the substratum 

 by irregularly branched and septate rhizoids which penetrate 

 often rather deeply into the loose limestone, upon which espe- 

 cially I have found the plant growing. In the cells of the rhizoids 

 starch is richly present. The uppermost rhizoids growing out 

 from the stalk are more rhizome-like, creeping as they do on the 

 surface of the substratum, and from these new stems grow up 

 often in great number (Fig. 40). Owing to this mode of growth 

 the plant also grows gregariously often in large tufts. How far 

 all the individuals in a tuft have their origin from this mode of 



Fig. 40. Clunncedoris Peniculum (Sol.) O. K. 

 Base of a plant. Young stems growing up 

 from the rhizome-like filament. (About 3:1). 



