MjTcophycege, Chamfesiphonacefe, Xenococcus. 183 



Genus dubiura, hinf? Pleurocapsam illinc Dermocarpam tangens '). 



XENOCOCCUS Tlmr. [1875] Essai de c\. d. Nostocliinees p. 373, Born. 

 et Thiir. Not. Algol. II (1880), p. 70 (I£tym. xenos extraneus ct 

 coccos granum), Hansg. Physiol. und algol. Studien p. 111, Prodr. II, 

 p. 128, Ardiss. Phyc. Med. II, p. 291, Kirch. in Engl. et Prantl 

 Nat. Pflanzenfam. p. 58, f. 51, Coleonema Schousb. 1825 mscr., 

 Bermocarpcv sp. — Cellulse subsphsericoe vel e mutua pressionc 

 plus minusvo angulosae, sparsie aut in stratum indefinitum epiphy- 

 ticum aggregatse. Contentus cerugineus, v. violaceus homogeneus. 

 Reproductio fit aut divisione cellularum in directiones tres aut 

 etiam gonidiis globosis vel subglobosis intra cclluhis periphericas 

 (marginales) rapide accretas evolutis et domuni liberatis. 



1. Xenococcus Schousboei Thur. in Born. et Thur, Not. Algol. II, 339 

 p. 74-76, t. XXVI, f. 1-2, Ardiss. Phyc. Medit. II, p. 292, Setch. 

 et Gibbs in C. H. et S. Phyc. Bor. Amer. n. 554, Bermocarpa 

 Schousboel (Thur.) Born. in Batters Mar. Alg;Te of Berwich-on 

 Tweed p. 11 (1889) t. VII, f. 26, Alg. de Schousboe p. 179, Holmes 

 Alg. Brit. rar. exsicc. n. 80, Coleonema arenifera Schousb. Icon. 

 ined. t. 6, Alg. Schousb. n. 16. — Stratis globosis, viridi-cserulcis, 

 nunc sparsis et solitariis nunc gregariis et confluendo filamenta 

 matricis omnino cingentibus, his insimul compressis, illis sphaericis; 

 cellulis 4-9 [i. diam. 



Udb. in filamentis Algarura imprimis Ly ngby acear u m e. gr. 

 L. luteo-fusae ad Tingin Afric;^ (Schousboe), L. semiplenm ad Biar- 

 ritz (Bornet), ad oras Guasconioe (Sauvageau), Anglia?. (Batters), 

 Norvegiie (Boye, Foslie), Itali;i3 ad Porto Maurizio (Strafforello), 

 Lyngbyae ^Estuarii seu salinae pr. Lussin-piccolo maris Adria- 

 tici (Hansgirg^), Lyngbyre guyanensis ad Cayennam Americas 

 (Leprieur, Montagne), in frondibus Rhodochortonis Rothii 

 et Rhizoclonii riparii ad «Nahant, Mass. » America? borealis 

 (Collins); in Calotr. crustacea Californiae (Setchell et Gibbs); 

 in Chsetomorpha nodosa Amer. mer. (Spegazzini, De Toni). 

 — Var. pallida Hansg. Beitr. zur Kenntn. der Quarn. und Dalm. 

 Meeresalg. p. 2: cellulis 3-5 [j,. latis, globoso-angulatis, contentu 



') Species noanuUas, huic generi oUm adscriptas, auctores nuperiores ad 

 Dermocarpam pertinere suspicati sunt, ergo genus vix servandum videtur. 



