Lithothamnion. CORALLINES (AUCIOR. ARESCII.). 



Frons in meo spccimine colons griseo-calcarci, diametro usque >- 

 pollicaris, pulvinato-hejnisphffirica, subtus in medio cava, tola e ram is 

 fruMculosis plus minus crectis donsissime compactis et pulvinato-fastigiatis 

 formate. Kami normaliter cylindracei, inferne inter so anastomosibus coa- 

 dunati, indeque plus minus compressi, multilido ramulosi, apiccm versus 

 plerumque atlenuali, saltim nunquam incrassati. Keramidia elevata dense 

 per ramos sparsa poroque evidontcr perlusa. 



Sebas figura, a nobis citata, cum nostro specimine bene convenit, 

 ramis paululuin teuuioribus solummodo recedens. 



4. LITII. BRASSICA-FLORIDA (Harv. Ner. austr. p. 110) "frondo lapi- 



descente ponderosa globosa c contro undiquc raniosissinia, 

 ramis basi anastomosantibus apice multifidis corymboso-fascicu- 

 latis fastigiatis, apicibus mfitoillaeformibus.' 1 



Melobesia Brassica-florida Harv. I. c. 

 Hal). In sinu Algoa (Harv. I. c.) 



"Frons globosa, 23 uncias diametro aaquans, e centro ramosa ct 

 cymam Brassica? florida3 eximie referens." (Descript. Harveyi exscript.) 



5. LITH. DARWI.M (Harv. Ner. austr. p. 109) fruticosa, ponderosa, 



rainosissiiua, ramis densissime aggregatis erectis in massam 

 crassam congestis, raraulis verticalibus apice conoideis. 

 Melobesia Darvini Harv. I. c. 

 Hub. in King George's Sound. (Darwin). 



Format stratum extensionis ignota?, 23 uncias altum, frondibus cy- 

 liudraceis ramosis lapidescentibus compactis formatunr, divisiones erecla-, 

 ultima? libera et mamillaeformes. Planta cougeriei stalactitum non dissi- 

 milis (Descript. Harv. exscript.) 



6. LITFF. CALCAREUM (Ell. et Sol. p. 129 t. 23 f. 13) fronde rrocfo- 



fruticulosa alba dichotoma, ramis inferne coalescciitibus superno 

 regulariter divisis attenuatis. 



Millepora calcarea Elf. et Sol. I. c. - - Lamarck. Hist. d. anirn. s. vert. 

 2 p. 204. 



Melobesia calcarea JIarv. Man. of Brit. Alg. c.d. 2. Ner. austr. 

 p. -MO. 



Hab. in mari atlantico ad littora Britannia) et (lallia); in mc- 

 diterraneo; ad Novam Zelandiam insulasque Gallopagos sec. flarv. 1. c. 



Frons fruticulosa 2 3-pollicaris subdichotoma-, rami basi 1 2 lineas 

 diametro aequantes, inferne coalesccnlfs. siipenie liberi et attenuati, di- 

 stantes, (nee ut in prioribus spociubus inter se dense stipatij fere diva- 

 ricati rugosi et papilliferi. De cetero quam Lith. byssoides crassior atque 

 obesior et sequent! forsan maximc affiuis. 



34" 



