— 324 — 
rarius plus quam Splo longiores, superiores idem subaequan- 
tes; genicula tenuiter corticata. ^ Spinulae e basi lata, intus 
cellulis purpureis repletae, acuminatae, i. e. subtriangulares, 
ad exterius tantum forciparum latus obvia, ad genicula solita- 
ria. Peritetragonidia prominenti-exserta, verticillata, obovata. 
XXXI. GRIFFITHSIA. 
Thallus capillaris l. filiformis, unica cellularum serie con- 
structus, ecorticatus. Sporocarpia excipulo unicellulari, Sporas 
conglobatas foventia, ramulis involucrata. Peritetragonidia in- 
tra involucrum ramulis verticillatis formatum recepta. 
4. GrrrrrrusrA CORALLINA Ann. 
Thallo irregulariter dichotomo, cellulis diametro 2—Aplo 
longioribus superne incrassatis, eeniculis contractis, involucro 
8 . I . » $5 . 2 
peritetragonidiorum ex apice cellularum egrediente. 
Conferva corallinoides Linn. Sp. PI. ed. 2. v. 2. p. 1655. 
—-——— corallina Lighif. Fl. Scot. p. 82. (.44.) 
Griffithsia. corallina. 443. Sp. v. 2. p. 127. 
In fundo extrataeniensi. limoso  conchifero ]. petroso 
ostreifero, a DBahusia infima, v. c. ad Hladesholmen, usque in 
Roster, ubi in fundo Segesáta optima; in mari Norvegico pro- 
pe Christiansund mihi obvia. Jun. — Aug. | 
Planta elegantissima, coloris metallico-nitentis, aureo-rubri, 
usque 6-pollicaris. Et Sporocarpia et tetragonidia in planta 
Bahusiensi optime adsunt. 
