A REISVED LIST OF CORALLINE. 37 



Decaisne assigned some of the members of the present section 

 to the genus Jania. Lamouroux's original deHnition of Jania, 

 which was followed by many distinguished systematists, can by 

 no means include the present section. Areschoug wisely reckoned 

 them under Corallina instead of Jania. 



Corallina gracilis Lamx. has been held in doubt by Are- 

 schoug."^ This species has not been fully defined and is hardly 

 referrible to other plants without authentic specimens. In Phyc. 

 Bor. -Amer. '^^ this name is assigned to one of the plants. The 

 specimen is more applicable to Go7\ Gavieri var. caUvptera. Grun. 

 than the imperfectly described species of Lamouroux. Collins 

 mentioned, in no. 650. of the same exsiccate, a plant bearing 

 the name of Corallina gracilis Lamx. var. densa Collins. But 

 the plant labelled no. 650 b. in the copy kept in my herbarium 

 is quite distinct from the type species with regard to the characters 

 of the articuli of the axial stems. It is related in several respects 

 to a form of Cor. Cuvleri. It probably belongs to an undescribed 

 species and must wait further study with a large stock of speci- 

 mens. The specimen labelled 650. a. contains many fragments of 

 distinct forms, all of which it is improper to refer to no. 650. 



Almost all of the members of this section are inhabitants of 

 the Australian seas. 



Gen. ril. 



JANIA LAMX. 



Jania adhaerens Lamx. Histoir. p. 270. 



= Corallina adhœrens Kütz. Spec. p. 710. 

 J. decussato-dichotoma f 



1) Memoir, p. 111. 



2) J. Ao. Spec. Alg. II. p. 572. 



3) Collins, Holdkn and Setchell. No. 395). 



