( 1S8 ) 



about or even below tlic middle of tlie bi-anclilet in which it occurs j 

 whereas in the present, it extends to its n-pcx, and is greatly prolonged 

 beyond the point at which it would naturally terminate. This is a 

 sufficiently obvious character, and one which, seeming constant, will 

 readily serve to distinguish the species ; but whether it will serve to 

 constitute them separate species is a diiferent question, and one which 

 future observation may be able to determine. 



The colour of the two plants, so far as our obsei'vation goes, is the 

 same ; a fine soft olive green when young, changing to a more or less 

 dark rusty brown when they have reached maturity. 



The present is almost as common as the last, forming a very con- 

 spicuous object in every tide-pool. 



ECTOCARPtJS LONOIFRrCTUS. 



EXPLANATION OF DISSECTIONS, kc. 



Fig. 1. — Eraiicli. 



2. — Fruit. Botb magnified. 



