Development of Laminaria hulbosa , L amour. 43 
seeing Gunner’s figure. It is fair to suppose that this figure 
of Gunner’s has the umbrella-shaped process described by 
Turner. I have not been able, however, to obtain a sight of 
the volumes where F. bifurcatus is figured by Gunner 1 ; nor 
have I in any other work met with a figure of a young L. 
bulbosa. Turner further states his belief that Gmelin’s F. 
bicornis is identical with F. bifurcatus , but I cannot find any- 
thing in the description to sanction this assumption. His 
suggestion that F. bifidus , Gm. is also a young specimen of L. 
bidbosa seems to be reasonable. There are no figures of F. 
bicornis and F. bifidus in Gmelin’s work 2 : but his description 
of the latter species, founded on a specimen sent by Steller 
from Kamtschatka, distinctly points to Turner’s conclusion. 
The description of L. elliptica by C. A. Agardh, 1 radice mem- 
branaceo-scutata radiata , stipite compresso in laminam ellipticam 
integrant expanse V seems again to point to a young stage of 
L. bulbosa. In fact the author himself throws out the query 
whether this is not the case. J. G. Agardh in his Species 
Algarum states that he has seen the single specimen on which 
the species was founded, and quite agrees in considering it as 
a youthful stage of L. bidbosa. He further states that L. 
Belvisii , Ag. does not materially differ from L. bidbosa. The 
specimen of it which he saw was sent from Guinea by Bory to 
Horneman ; and this, perhaps, is his ground for stating that the 
species extends from the coasts of Norway to those of Guinea 
— a wider distribution than I have found recorded elsewhere. 
Greville 4 mentions that Mrs. Griffiths examined all stages 
of the plant, and that she bore testimony to its extreme varia- 
bility according to situation. But Agardh gives the first full 
and accurate description of the development of the bulb I 
have met with : ‘ Below the origin of the lamina there is 
seen on the stalk a circular line, sharply projecting. This 
gradually expands into a shield-like lamina whose margin 
bends downwards all around. It thus becomes hemispherical 
1 Acta Nidrosensia, iv. 2 Historia Fucorum, pp. 192, 201, 1768. 
3 Sy sterna Algarum, 1824, p. 271. 4 Algae Britannicae, 1830. 
