422 rliMOZOOsporinse, Clion.lariaecM, Leritliesia. 



exteriore curvaturfe latere infra apicera serie ramulorum unilate- 

 raliter plumulata; inferiores ramulorum superioribus paulo longio- 

 res, omnes brevissimi, unico articulo fere constituti, expansione 

 unilaterali articuli generantis initio saltem foi'mati. Pluinula lia^c 

 minutissima gelatina indivisa siepe cohibetur. Sj)orangia unilocula- 

 ria cunoa.to-obovata, majuscula, dimidium fihun longitndine SKpius 

 aM[uantia. unnc superantia, filis multo crassiora. 



LEATHESIA Gray [mi] lirit. Pl. I. p. :101 {Klyn). a (i. R. Lk.\thes 

 cui geuus dicatum), .1. Ag. Sp. 1, p. 50, Till Algern. System. IV, p. 40. 

 De Toni Syst. Uebers Fucold. 1891, p. 178, Kjellm. Handbok I, 

 p. 08, Eugl. & Prantl Natiirl. Pflanzenfam. 86. Lief. p. 228, Cory- 

 ■uepliont \'A- \\><-lV, Syst. p. XIX, Clacntella Bory [1823] Dict. class. 

 111,11. 1'"' C/ur/ophofd-. lUcu/ari(V. T)-eme//a\ U/cce, Nostocis sp. 

 auct. veter. — Frons parva. centrifuge crescens, primitus globosa et 

 solida, demum irregulariter lobata et cava, gclatinoso-carnosa; axis 

 abbreviatus e cellulis oblongis in fila a puncto centrali radiantia de- 

 composito-furcata conjunctis constitutus; fila peripherica e cellulis 

 extrcmis minoribus egi-edientia, muco involuta, simplicia, clavata, 

 brevia, monilifoniii-articnl^ita. Sponingia unilocularia ellipsoidea 

 aul iiirifunnia, ad basin rildniiii [leripliiTirunuii cvolata; sjioran- 

 -ia iiluriloculiiria uuisrrialiiii loceliata, iilirnniiia, ad liasin filorum 

 pcriiiliericorum evohita. 



1. Leathesia difformis (L.) Arescii. Pliyc. scand. p. 376, Kjellm. Hand- go; 

 liulv 1. p. ;;s, r. 8 li-c. KucIv. UcmcrlK. iib. Algenveg. von Helgoland 

 18'.tl. [lag. 218. Tvcinc//a (Ji//hr>n/s L. Fl. succ. [>. 120, Xostor 

 „(ari,niii( Ag. Disp. p. 15. Nustor (Ctcscn/cric((((( ,Vg- ^vst. p. 21, 

 Cortittep/iora i(((trina Ag. Syst. p. 21, C/iwate/la Nostoc Bory l.c, 

 Cti(r/((p/((ira iixtrintt Lyngb. Hydrophyt. Dan. pag. 193, tab. 66^ 

 ([icssinia i|uoad analysin\ h'ivu/aria tul)eriforniis Engl. Bot. tab. 

 1!I5(;. lA-ttt/(csia /nticci/hrnds {\nx^ Arrang. Brit. pl. vol. I, p. oOl, 

 llarv. Phyc. P.rit. 1. 321. .I..inist. & Croall Brit. Sea Weeds HL 

 p. 117, f. I-l (pessima), Leat/tesia marina .1. Ag. Sp. I. p. 52, 

 Kuetz. Sp. p. 543, Ulva inesenterica Bonuem. sec. .1. Agardh, 

 ('ori/i((iji/i/(C(t />a//ica Kuetz. Phyc. gencr. p. 331, Sp. p. 513, Co- 

 r>picp/„>r(t /itt//ica Kuetz. Tab. Phyc. VIII, t. 2, f.II?. — Frondc sub- 

 glolHisa varieipie lobata, olivacco-liruunea,. demum cava, lilis peri- 

 pliericis clavatis, articnlo tiTiniiiali iiillato ; sporangiis 35 » 17. 

 Ilab. ad Ahnfeltiani plicatam, (orallinas aliasiiue al- 



