A ilonograph of the Genus Alarii. 109 



= Laminaria esculenia Lamx. : Essai Thalas?., p. 22. — Ag. : 



Synopsis, p. 16.— Id. Systema Alg., p. 269.— Itl. : 



Spec. Alg., p. 110.— Steömf. : Act. Havii, 10, Tab. 



F, fig. 2,— Lyxgb. : Hyclropliyt. Dan., p. 23. 

 = Lammaria esculenta icmiata De la Pyl : Flora Terr. Xouv. 



in Ann. Sc-i. Nat., IV, p. 177. 

 = Laiidnaria esculenta var. Noltii Hornem. : Dansk Oekon. 



Plant, II, p. 737. 

 = Lammana linearis De i.a Pyl : Flora Terr. Xouv., p. 37.? 

 = Laminaria Noltii Ag. in litt. (Herb. Trinity Coll., Dublin). 

 = Alaria muscefolia Kjell^^f. Algen veg. Murra. Meeres, p. 35. 

 = Älaria esculenta f. austmlis Kjei.lm. : Alg. Aret. Sea, ]). 212. 

 = Alaria esculenta f. muscefolia KJELL^r. : 1. e. 

 = Alaria esculenta f. pwnafa Fosl. : Mar. Alg. Norw., I, p. 71 



(excl. synoii.). 

 = Alana esculenta f, ti/pica Eörges. : Alg. Faeroes, p. 449. 

 = Alaria esculenta f. fasciculata Stkö.mf. : Algenveg. Island 



Knster, p. 38. 

 = Agarum esculentum BoKY : Diet. Class. IV, p. 194. 

 '! = Alaria esculenta Hart.: in Smith. Inst, for 1867, p. 463. 



Definition of the species. Pioot, holdfast of dendritic ramifica- 

 tion. Blade linear-lanceolate, l-G meters long, 5-20 cm. broad, 

 membranaceous, frosted with cryptostomata on both surfaces, 

 margin entire, splitting in the older parts of the blade obliquely 

 towards the midrib ; base of blade gently tapering below when 

 young, acute in adults ; tip of blade narrowed above, generally 

 pinnately cleft and roughly worn away. Stipe 8-20 cm, in length, 

 subcylindrical below, 2.5-3.0 mm. in diameter, gently broadened and 

 terete upwards, measuring 4-6 mm. in width, but quickly narrow- 

 ed at the transition point ; lower half of the length naked, upper 

 half bearing the sporophylls. Midrib smooth, complanated, elevat- 

 ed above the blade equally on both surfaces with angulate edges, 

 continuous to the stipe below. Sporophylls, metasoric, numerous, 

 pinnately arranged on both margins of the complanated part of 



