312 PALMELLE^E. 



mucoso frondis matricalis substrate obvoluta et impedita 

 extricari nequeunt et ibidem evolvuntur usque dum tandem 

 eodem dissolute et evanido libere disseminantur. In primis 

 illis frons, tota vita perdurante, semper definita remanet : in 

 his primum definita quidem est, sed ab initio usque effunditur 

 et dissolvitur. Differunt itaque Coccochlorides a Palmellis, in 

 eo quod granula in sinu globulorum ipsorum gignuntur et 

 evolvuntur, proptereaque frons definita hie necesse inest, dum 

 illaB eodem necesse carent; et quamquam serius in multis 

 quoque Coccocliloribus frons ipsa effundatur, origine tamen 

 summopere ab ilia Palmellarum differt. Ita ut Palmellce Proto- 

 coccos in muco indefinite nidulantes representant, sic Cocco- 

 chlorides a Chlorococcis in fronde mucosa definita inclusis 

 efformataj dici possunt." 



1. COCCOCHLORIS PROTUBERANS Spreng. 



Plate LXXVI. Fig. 7., and PI. LXXXII. Figs. 6, 7, 

 8, 9, 10. 



Char. Fronds green, gelatinous, soft, irregularly lobed, spread- 

 ing, confluent. Globules elliptical, generally more obscure 

 towards the centre. Vesicles of various sizes, spherical or 

 elliptical, constantly surrounded with a diaphanous margin. 



Ulva protuberans Smith, E. B. t. 2583. Palmella protu- 

 beransGrev., Flor. Edin. p. 323.; Crypt. Fl. t. 243. f. 1. 

 Palmella protuberans Ag., Syst. p. 14. ; Hook. Br. Fl. 

 vol. ii. p. 396. ; Harv. in Manual, p. 176. Coccochloris 

 protuberans Spreng., Syst. Veg. vol. iv. p. 373. Palmo- 

 gloea protuberans Kiitzing, Phy. Gen. p. 176. 



Hab. Sussex, spring to autumn : Mr. Borrer. Camsie 

 Glen, near Glasgow : Sir W. J. Hooker and Dr. Greville. 

 Pentland Hills : Dr. Greville. On the ground at Crow- 

 borough Warren : Mr. Jenner. Co. Wicklow : Mr. 

 Moore. 



" The fronds in the beginning roundish, of very variable 

 magnitude, quickly run into a mass more or less extensive, 

 investing surrounding bodies or spreading over the naked soil. 



