Ser. MELAlSrOSPERMEiE. ( 85 ) Fam. DICTYOTE^E. 



Plate CLX. 

 STILOPHORA LYNGBY^I.— J'. Ag. 



Gen. Chak.- — Frond filiform, cylindrical, solid or tubular, cellular, much branched ; 

 branches irregularly dichotomous. Fructification : obovate spores, nestling among 

 hemispherical wart-like tufts of clavate jointed filaments, scattered over the 

 surface. Name from (ttiAtj, "a point or dot," and (popeco, "to bearj" alluding 

 to the dots of fructification. 



Stilophora Li/ngbi/cei. — Froucl tubular from the first, " at length 

 distended," much branched; branches dichotomous, patent, much 

 attenuated to the summit ; axils wide, rounded ; apices much acumi- 

 nated; sori mostly disposed in transverse Hues, arising from branching 

 filaments. 



Stilophora Lynghycei. — /. Ag. Symh. vol. i. p. 6 ; Sp. Alg. vol. i. p. 84 ; Endl. 

 8rd Suppl. p. 26 ; Harv. P. B. plate 237 ; Harv. Man. p. 40 ; Harv. 

 Syn. p. 34 ; Atlas, plate 10, fig. 39 ; /. G. Agardh, Sp. .Gen. Alg. 

 vol. i. p. 84. 



ScTTOsiPHON paradoxus. — Fl. Ban. t. 1595, f. 2. 



Spermatochnus xmradoxus. — Kiitz. Phyc. Gen. p. 335. 



Chordaria paradoxa. — Lyngh. Hyd. Dan. p. 53, t. 14. 



Striaria Grevilleana.—Pollexf. MS. 



Sporochnus rAJsocZcs, ^paradoxa. — Ag. Sp. Alg. vol. i. p. 157 ; Grev. Alg. Brit. 

 p. 43 ; Hook. Br. Fl. toI. ii. p. 275 ; Harv. Man. 1st edit. p. 27. 



Hab. — On mud and sand, in firom three to twelve fathoms water. Annual. Summer. 

 Common on the shores of Ireland and Scotland. 



Geogr. Dist. — Baltic Sea; Atlantic coasts of Europe ; MediteiTanean Sea. 



Description. — Root, a minute naked disc. Frond thickest at the 

 base, gradually tapering upwards to a capillary fineness, tubular from 

 the first, cylindrical, from one to two or even " six feet in length," 

 much branched ; branches mostly dichotomous, sometimes fastigiate or 

 alternate ; all the divisions very patent, axils very patent and rounded. 

 Structm-e cellular, cells large in the centre, smaller towards the circum- 

 ference. Stem, in a very early stage, perhaps quite solid, veiy soon 

 becoming tubular by the disapj)earance of the large central ceUs, " at 

 length veiy much distended " downwards, " with a wide tube and thin 

 walls." Substance, " when recent, crisp, and very brittle," afterwards 

 more tough and flaccid, and closely adliering to the paper. Colour, 



