Protococcoidea3, Palmellacese, Urococcus. 673 



pius annularUarticulato sufFulta. Difflueatia tegutuentorum abeunt 

 cellula) Urococci in statum palmelloideum. 



* Species stipite tegumentis iiicrassatis formato, distiQcte annulato. 



1. Urococcus Hookerianus Berk. et Hassall Freshw. Alg. p. 325, n. 5, 1580 

 t. LXXX, f. 4, Kuetz. Spec. p. 206, n. 3, Rabenh. Fl. Eur. Algar. 



III, p. 31, Cooke Brit. Freshw. Alg. p. 9, t. 4, f. 1, Wolle Freshw. 

 Alg. U. S. p. 201,. t. 123, f. 13, A. Borzi in Malpighia 1886, III 

 et in Notarisia 1887, p. 280. — Thallo mucoso, subrubiginoso ; 

 cellulis globosis vel ellipticis, magnitudine variis 6-13 [x. diam., san- 

 guineis, granulosis; stipite plus minus elongato, saepe diviso, dense 

 annulato. 



Ilab. in rupibus calcareis Angliae (Hooker, Allman), in locis 

 paludosis turfosis ad lacum «FeMseen sylvae nigrae, in consortio 

 Zygnemaiis ericetovum et Mesolcvnii (A. Braun), in insula Sici- 

 lia prope «Messina» (A. BoRZi); in America boreali (Wolle). 



2. Urococcus insignis Hassall Brit. Freshw. Alg. p. 325, t. 80, f. 6, issi 

 Kuetz. Sp. p. 207, Rabenh. Fl. Eur. Algar. III, p. 31, Cooke Brit. 

 Freshw. Alg. p. 9, t. 4, f. 2, Wolle Freshw. Alg. U. S. p. 201, 



t. 123, f. 11-12, Hansg. Prodr. pag. 144, f. 89, Protococcus ma- 

 crococcus Kuetz. ex p,, Chroococcus ^nacrococcus (Kuetz.) Ra- 

 benh. ex p., Protococcus aureus Kuetz. ex p. — Cellulis glo- 

 bosis, 23-53 p.. latis, cum tegumentis externis stipitellatis 33-75 

 11. cr., primo viridibus, dein brunneis vel fiavo-aureis. 



Hab. in lapidibus udis, in turfosis Anglise (Hassall), Bohe- 

 misQ (Hansgirg), Italice (Martel), Germaniaj (Richter), Americ:^? 

 borealis (Wolle) — De speciminibus Urococci insigyiis Hass. in 

 Hauck et Richt. Phykot. Univ. n. 82 distributis, clarus P. Ri- 

 chter in Hedw. 1886, 6 sequentia monet: cellulas juveniles Uro- 

 cocci insignis videntur primo chlorophylloso-virides, palmelloideae, 

 habitu Gloeoctjsiis, 3-5 [j.. diam.; dein in familias accrescuntur 

 (divisione succedanea et tegumentis), ad 14 u. longas, demum sphae- 

 ricse fiunt, liberse et 10 a, et ultra diam. metientes; cellulce adul- 

 tiores globosse, 20-35 a. diam, vel oblongaj 35-21 et tunc lateri- 

 tise vel flavo-aurefe vel brunneolae. Richter in cellulas flavo-au- 

 reas observavit corpuscula bacillaria flava, ellipsoidea, aliis mino* 

 ribus trepidantibus immixta sed phenomena copulationis seu fcE- 

 cundationis haud vidit, — Var. ferrugineus Lagerh. Pediastr, Protoc. 

 och Palmellaceer p. 75, t. III, f, 31-33, Hansg. Prodr. pag. 144: 

 plasmate cellularura flavo-ferrugineo; diam. cell. s. tegum. 28-66 



43 



