Ob BRITISH SEA-WEEDS. 



lities on the south coast, and in Jersey. Specimens 

 usually require to be freed from sand and other foreign 

 matters before being laid down, and the greatest care 

 must be taken not to remove the fibrous fringe or to 

 destroy the epidermis during this operation. 



Genus XVII. ZONARIA. 



Root coated with woolly fibres. Frond flat, ribless, 

 leathery, membranaceous, fan-shaped, entire or cleft verti- 

 cally into radiating segments, marked with indistinct con- 

 centric lines. Fructification roundish or linear clusters 

 of spores formed beneath the cuticle of the frond, and 

 bursting through at either surface. — Zokabia, from the 

 Greek zone, a zone or girdle. 



This genus contains several species, which, with the ex- 

 ception of the two following, are confined to warm regions. 



Sonaria collaris. Collar Zonaria. 



Frond composed of two distinct parts ; the lower or pri- 

 mary procumbent, leathery, orbicular, sometimes divided 

 into lobes, with a dense woolly coating on its under sur- 

 face, by which it adheres to the rocks ; the upper or 

 secondary, springing from the lower, cup-shaped, membra- 

 nous, the edge notched at distant intervals, and fringed 

 with delicate, jointed fibres. Fructification not hitherto dis- 

 covered on Jersey specimens. 



The claim of this beautiful species to be included in 

 our flora rests at present only on Channel Island speci- 

 mens. Professor Harvey first received it from Miss 

 Turner, who picked it up in ' Granville' (Grouville ?) 

 Bay ; and I have since seen several specimens, of the 

 secondary part of the frond only, from the same or other 

 Jersey localities. 



