Cordylecladia. Rhodymeniage^. 327 



3. C. PURCELLATA (J. A(j. iuscr.) froiidibus a clisco crustaceo 

 erectiusculis ex tereti subangulatis — exsiccatione angu- 

 latis — distanter dichotomis nudiusculis, ramis sparsim 

 constrictis et a strictura proliferis, summis vix tenuiori- 

 bns obtusiusculis, cystocarpiis ad ramulos hic illic irre- 

 gulariter aggregatis. Gymnogonfirus furceUafus Harv. 

 Aly. austr. exsicc. n:o 295 quoad sp. e Port Philip Heads. ! , 

 (nec Agardh). 



Ad Novam Hollandiam australem; e Port Phillip, F. 

 Mueller. 



Cord. furcellata inter Algas Novee Hollandise plures caute digno- 

 scenda. Habitu frondis et expansione radicali crustacea fere conve- 

 niunt C. furcellata, Dicurella concinna et Melanthalia intermedia Harv. 

 Cordylecladia exsiccatione fit fere prismatico-angulata, rami novelli 

 quasi e strictura frondis proveniunt, ramificatio minus regulariter di- 

 cliotoma, nullomodo fastigiata, neque axillse rotundatse. Dicurella con- 

 cinna et Melanthalia exsiccatione teretiusculfe adparent, axillse sunt 

 rotundatas, et ramificatio eximie dichotomo-fastigiata. In Cordylecla- 

 dia ramos juveniles, a strictura terminali provenientes, obovatos video, 

 in quibus demum sphperosporas evolutas suspicarer; in Dicurella api- 

 ces in ramulos plures, a basi latiore acuminatos, subdivisos vidi, et 

 in his sphrerosporas magnas zonatim divisas inter paranemata nema- 

 theciosa nidulantes; in Melanthalia apices juveniles uunc quidem sub- 

 acuminatos, demum in clavas obtusas, strato nemathecioso amplo cir- 

 cumdatas, mutatos observavi; sphserosporas in his frustra quajsivi. 



Obs. Harvey sub n:o 375 Alg. austr. exsicc. habet Cordylecladiam? 

 australem, quam nusquam ab ipso postea memoratam video. Ex spe- 

 cimine sterili, quod ipsi debeo, vix Cordylecladiam, potius in vicinia 

 Gracil. Confervoides disponendam credidissem. Cellulas strati corti- 

 calis simplici serie dispositse mihi adparuerunt. 



Species miJii quoad Genus duhice. 



4. Plocaria heteroclada (Mont. Fl. d'Al(/. p. 73 tah. 16 fy. 



4) fronde cartilaginea phma laxe dichotoma, segmentis 

 linearibus patenti-erectis obtusiusculis e margine ramenta 

 subsecunda compressa apice ovoidea fructigera emitten- 

 tibus, tetrasporis oblongis in strato corticaH ramentorum 

 nidulantibus cruciatim quadridivisis. J. Ag. Sp. p. 705. 

 In littore Algerise. 



5. CoEDYL.? HuNTii (Harv. Ner. Bor. Am. p. 155) frondibus 



a disco crustaceo dense csespitosis livido-purpureis tereti- 



