l'liKiizoos|ioi'iiKr, I,aniii)ariat'i\i>, Costaria. 301 



ll((li. Mil littora Ciiinciiitcfo (Uupueciit). — Frons (laiiiiiia) mo- 



(liiicris. 1-,' (111. iiltii, vix 5 cui. lata. LiUiiiiiio liitiis altoniiii altius 



(••onhiliiiii. rcri' siiijittatiiiii. siifsiiiii involiitiiiii. Miirf,'o iii sti|iif('in 



1(1 is iiiilliiii. circitiM- hitmii ilcciirrciis, incriissatiis. HiidiK liliros;i. 



COSTARIA (livv. !1S:1() Syii. .\l-. llrit. p. XXXIX (Ktyiii. rasVr^ w- 

 shr . I'iist. ct liiipr. Ilhislr. .\l^^ p, Vl. i. ;;!!. t. 17. Kiict/.. S|i. p. 

 580, .1. .\g. Si). I. p. l;;!l. Dc 'rmii Sysi. Tclicrs. Fiicoid. ]8!)1, p. 

 177, Arcsch. Oliscrv. plivcol. IV. p. -il. Kiclliu. iii \\\v;!\. & Pnintl 

 Natiirl. Pflanzcnliuii. !)7. Liot'. p. 2o7, l)o ,\lton Siuinilcrs in l!o- 

 tanical Gixzette XX, 1895, n. 2, p. 57, Fdci, Agari, IjdniiKO-ia' 

 sp. aiict. votcr. - Rivlix fiiirosii, fibris subsimplicibiis vcl ;ipicc 

 tiirciitis. 1'ruiiciis siMi stiiics superiic ililatatus, comprossiis. Iuii^^i- 

 4iiilin;ilitcr ii:uicistri;itus ; stri;e in huiiinam intrantes ot iii pliciis 

 norniiilitor (piiutiue (raro unicani) abeuntes, in media parte Iblii 

 ovati divergentes, basi et apice convergentes, longitudinales et co- 

 staiformes. Plicse per totiim laininiim crassitudine factio duo hitera 

 dissiniiliii, altenim latus tereti-rotundatum et costseforme, altoruni 

 cavum seii canaliculatum prajbentes. Sporangia ad bixsin lainiiuo 

 in soruin haiid acute definitum coUecti. 



Ohs. Iii iiltera lixminie pagina tres invoniuntur pIic;o cost;ofor- 

 mes, in altera cUuc plicaj canaliculataj. In adiiltiore folii lainina oh- 

 servantur inter plicas foramina rotundata et in ipsa membrana 

 riigffi bulla-quo. Recedit Costncid i'etic((,lata I)e .\lt.-Sauiiil. 



1. Costaria Turneri (ircv. Syn. in Alg. Brit. p. ,XXX1X, HiU-v. Nor. soii 

 bor. Anior. 1, p. S9, Alg. of Viuicniivor Isl. ii. lOr,. .1. Ag. Sp. 1. 

 p. Li!), Aresch. (Jhsorv. phycol. IV, p. -20, Fams imtafits Turii. 

 Hist. Fiic. tiib. 2-K>, La)iiinai'ia costata Ag. Sp. I, p. 109, Syst. 

 p. 269, Costaria costata De Alt.-Sixuud. in Botiin. (iazette XX, 

 1895, p. 57 (nomen ineptum), AgariDii quinquecostatum Bory in 

 Dict. chiss. IX, p. 193, non Costaria Tnrneri Post. et Rnpr. — La- 

 iiiina margine integra, lanceolata vel lineari-lanceolata, 5-costata. 

 Hab. ad oras occidentales .\iuericiB, pnusertim al insulam 

 « Vancoiiver » et littus Californiaj (Ruprecht, De ,\lton S.\unders). 

 — Stipes 2 cm. aut paullo ultra longus, per totam longitudinem 

 striis subpar;xllelis notatus, ortu teres, mox compressus et demiiin 

 planus. Lamina longitudine maxime abludens nunc etiain longit, 

 bipedalis. iid semidecimetrum lata, margine integerrima lenitortiue 

 undulata, basi in stipitem cuneatiin decurrens. Radix fibris sub- 



