l'LATK XX. 



iitatus Lamarck forma elongata. Comal filament pari of fig. i6ja) ■ 15. I 

 and 1 are on plate XIX , 



'atus Lamarck. <t. surface view of cortex of stipes before decalcification, 



n". 14U'. b. the same 225. c. Filament of stipes <>t' same with lateral 

 appendages dichotomously divided and terminated by very small short truncate apii 

 pai .iitcr decalcification, 83. 



illus pyriforntis A. & E. S. Gepp. Habit of plant, nat. size. (Bahamas, Howi n". ^ïi§). 

 1 Ditto. Comal filament of same (calcified), ;. 



171. Ditto. ,1. surface view of papillose cortex "t stipes before decalcification, 83 (Bahamas, Howe 



n". 3236). b. filament of stipes of same with lateral appendages dichotomously divided and 

 terminated by tapering, acute, dactyline apices = papillae of fig. a) after decalcification, 83. 



172. Penicillus nodulosus Blainville. Habit of plant, nat. size. (Ile Toud, D'Urville, sul» nom. Peni- 



cillus arbuscula Montag.; labelled in MoNTAGNE's MS.. 

 Fig. 173. Ditto. Comal filament of specimen in Herb. Lamouroux, 5 labelled by Lamouroux: "28 

 Freycinet Nesea nodulosa"; als'o *Nesea granulosa. Freycinel. Baie des Chiens marins"). 



The right hand branch shows how the dichotomies lie in alternating planes. </. dichotomy 

 about 25. 



174. Ditto. Comal filament of one of Harvey's specimens. 5 (Fremantle, West Australia. Harvey 



Alg. exsicc. n' . 564). a. dichotomy about 25. 

 i 175. Ditto. a surface view of cortex of stipes before decalcification, tS^ (West Australia. Clifton, 



n". 204 in Herb. Mus. Brit.). />. Filament of stipes of same with lateral appendages dichoto- 

 mously divided and terminated by short capitate or rounded apii 1 fig. •/ . after 

 ■il 83. 

 176 Penicillus mediterraneus Thuret. Halm o! DECAISNE's type-plant of Espera mediterranea, nat. 

 size (Villefranche. Risso in Herb. Mus. Paris). An abnormally large specimen. 

 1 177. Ditto. \.scending filan ilcified) of another specimen (Cannes, ex Herb. Thuret in Herb. 

 Mus. Hnt. ,1 5; />, dichotomy 15. 



175. Ditto. forma perfecta, nat. size. Antibes, ex Herb. Thuret, n". 4209 in Herb. Mus. Brit.). 



