434 HYPNEACE/E. Caulacanthus. 



C. fastigiattis Kiitz. in variet. /?. quoad charaoteres umnino quadrat; 

 utramque identicam itaquc suspicor. later varietates n. et ft. notas di- 

 slinctivas nullas prater dispositionem sphnerosporarum video, et hanc 

 quidem a forma magis contracta ipsius frondis pendere pulo. 



Species inquirenda. 



2. C. SPINELLUS (Hook, et Hare, in Land. Journ. 1845 IV. p. 534) 

 pusilla, cartilaginea, rigida, densissiine casspitosa, intricata, vage 

 ramoso, ramis elongatis patentissimis di.varicatisfe simplicibus 

 furcatisve, ramulis spirueformibns subulalis acutis borizontalibus 

 undique emissis, tetrasporis in ramoruru ruajorum peripheria 

 nidulantibus sparsis. 



Rhodomela? spinella Hook, et Harv. 1. c. Harv. Ner. Austr. p. 30. 



Caulacanthus spinellus Kiitz. Sp. Alg. p. 753. 



Hab. ad oras Nova3 Zclandia3. 



Frondes % 1-pollicares, setaccie, in casspites late expanses dense 

 collects, irregulariter ramosissinue, rigidas, fusco-rubra3, exsiccatione ni- 

 grescentes', rami patentissimi, simplices aut furcati, longitudine frondis, 

 ramulis spinaaformibus liorizontalibus stepe secundis obsiti. Sphaero- 

 sporaj per ramos sparsse, peripheria immersa3. Tubus centralis adest, 

 cinctus pluribus scricbus rainorum, qui peripheriam versus magniludine 

 sensim diminuantur. 



Habitu Gigartinam spinellam ita aBmulatur, ut excepto colore obscu- 

 riore vix dignoscatur; dissectus structuram offert divcrsam. Etiam cuin 

 Gelidio corneo var. crinali comparandus, ramulis acutis vero facilius 

 distinctus. Structura Hhodomeleis multis convenit, sphserosporis sparsis 

 ab his abludcns. Cystocarpiis ignotis, genus incertum rnanet. 



Ita fere Harvey 1. c. Kiitzing, qui specimen vidit, Caulacanthi speciem 

 fecit, nullo adposito signo dubii. 



LXIX. ACANTHOCOCCUS Hook, et Harv. Alg. Anlarct. in 

 Lond. Journ. IV. p. 261. Crypt. Antarct. p. 171. Cystoclonii 

 sp. J. Ag. Callophyllis sp. Kutz. 



Frons lililormis, lerctiuscula aut coruprossa, dichotomo-ramulosa, 

 stratis fere tribiis contexta; strato luedullari fills elongatis 

 dicliotomis ct anastomosantibus arcuatiuj inter cellulas strati 

 intcrmcdii inagnas rolundatas oxcnrronlibus, cellulis superli- 

 cialibus rotiindato-angulatis. Desmiocarpia poricaqtio hcrais- 

 pba?rico clauso munita, gommidiis oblongis rainutis, a placen- 



