134 Myxophyceee, ChamfBsiphonaceae, Xenococcus, 



pallide caeruleo vel flavo-olivaceo. In frondibus C 1 a d o p h o r a r u m 

 in inari Adriatico prope Jaderani Dahnatiie (Hansgirg). 



2. Xenococcus laysanensis Lemmerm. Algenfl. der Sandwich-Insehi 340 

 p. 648, t. VIII, f. 10-12. — Thaflo epiphytico, disciformi, pseudopa- 

 renchymatico, e ceflularum stratu unico extante; cefluUs basi tegu- 

 mento hyalino mucoso circumdatis, confertis, a^rugineis, pirifor- 

 mibus, e vertice visu polygoniis, 5,5-7 [x. longis, apice 3-4 (x. crassis. 



Hab. ins. Laysan in Algis marinis (Schauinsland). — Diff^ert 

 a A^ Kerneri magnitudine celkilarum, tegumento gelineo apice 

 characteristico, deficentia tegumenti familiaB et statione marina. 



3. Xenococcus Kerneri Hansg. Physiol. u. Alg. Studien p. 111, t. I, • 

 f. 19, Prodr. II, p. 128, FI. austro-hungarica exs. n. 15961 Hieron. 

 in H. et R. Phyc. Univ. n. 685, CoU. in C. H. et Setch. Phyc. 

 bor. Amer. n. 9521 Wittr. et Nordst. Alg. exs. n. 899! — Cellulis 

 veg. plerumque 4-6 \u latis, idem vel usque ad 9 ^. longis, 

 stratu irregulariter expanso, plerumque unistratoso et crustaceo, 

 circ. 6-9 [J.. lato, rarius bi- vel phiristratoso, noduloso, verruciformi 

 vel foveokito 9-30 [x. lato, in sectione transversa sajpius 4-6-angu- 

 lari, apice rotundato; contentu sordide caeruleo-viridi vel viohiceo- 

 fuscescente; membrana arcte crassa, achroa, inconspicue stratosa; 

 gonidiis globosis, circ. 3 [x. latis, plerumque usque 32 intra mar- 

 ginalia gonidangia elTormalis. 



Hah. in variis Myxophyceis filamentosis nec non in 

 Lemaneis aquarum rapide fluentium Bohemiae, passim (Hans- 

 girg); in Rhizoclonio fluvii « Quilimane » dit. Mossanbicensis in 

 aqua subsalsa (Stuhlmann); in Cladophoris Amer. bor. (CoLlins). 



4. Xenococcus? concharum Hansg. Beitr. zur Kenntn. der Quarn. i 

 und Dalm. Meeresalg. p. 5, Beitr. zur Kenntn. der Meeresalg. und 

 Bacter. Fl. p. 227. — Strato microscopico, complanato, punctiformi 

 vel maculiformi, amorpho, expanso, violaceo-fusco vel nigro cte- 

 ruleo-virescenti; cellulis 6-9 [x. latis, globosis vel subangulatis, in 

 strata singula aut plura superposita pseudoparenchymatice concre- 

 scentibus; contentu violaceo aut chalybeo-viridi, subhomogeneo; 

 membrana hyalina, arcte adnata. 



Ilah. in cochleis Gasteropodum marinorum prope Jaderam 

 Dalmatia) (Hansgirg). — Cl. Hansgirg monet Iianc speciem cum 

 Chantransio3 forma quadam marina genetice esse connexam, ana- 

 logiam quasi cum falso genere Ashenasya, quod rovera ad On- 

 cohyrsam pertinet, ostendentem. Si ita sint res, novre observatio- 

 nes forsan comprobent. 



