Ser. Melanosperme^e. Fam. Bktyotex. 



Plate CCCLIX. 



ZONARIA COLLARIS, Ag. 



Gen. Char. Root coated with woolly fibres. Frond flat, ribless, fan-shaped, 

 entire or variously cleft, marked with concentric lines ; the cells of 

 the surface radiating. Margin fringed. Fructification, roundish or 

 irregular, scattered sori, bursting through the cuticle of both surfaces 

 of the frond, consisting, at maturity, of numerous spores nestling 

 among jointed threads. Zonaria (Ag.), — from (vvr), a girdle or zone. 



Zonaria collaris ; " frond procumbent, coriaceous, orbicular, or cuneate and 

 variously lobed, from its upper surface emitting cup-shaped, membra- 

 naceous fronds ; the under surface rooting, densely stupose." /. Ag. 



Zonaria collaris, Ag. Sp. Alg. vol. i. p. 127. Ag. Syst. p. 264. /. Ag. Alg. 

 Medit. p. 38. Midi. 3rd Suppl. p. 25. Kiitz. Sp. Alg. 565. 



Padina collaris, Grev. Syn. part xliv. Menegh. Ital. p. 245. Mont. Alger. 

 p. 33. 



Padina omphalodes, Mont. Crypt. Alger, p. 15. No. 168. 



Zanardinia prototypus, Nardo.'^(fide Meneg., fyc.) 

 Hab. ("Washed ashore.) Granville Bay, Jersey (May 1851). Miss 



Turner. (Very rare.) 

 Geogr. Distr. Mediterranean and Adriatic Seas. West Indian Sea. 



Descr. " The primary frond, when mature, is coriaceous in colour and substance, 

 widely spreading, furnished with a dense woolly coating on its lower surface, 

 by which it strongly adheres to rocks ; the upper surface is smooth, and 

 variously plaited longitudinally ; but by the action of the waves and of 

 animalcules is mostly very much torn and lobed. From the upper surface 

 of this primary frond rise cup-shaped secondary fronds, fixed by a very short 

 stipes, in the dried plant resembling an umbilicus, and with the limb 

 fringed with filaments. The youngest of these secondary fronds are 

 smaller than peas ; the full-grown about the height of the cup-shaped fronds 

 of Himanthalia ; all are delicately membranaceous, entire, and easily torn. 

 The fringe of hairs that crowns the frond is formed of the free apices of the 

 longitudinal strings of cells of the frond. Fruit unknown." /. Ag. 



This most interesting addition to the Channel Nereis, was 

 recently found on the shores of Jersey, by Miss Turner, to whom 

 1 am indebted for the specimens here figured, and which I re- 

 joice to be able to include in the present work They were 

 " quite fresh," Miss Turner informs me, " when picked up . 



