THE MAKIXE ALO.E OF NEW ENGLAND. 101 



Var. srii.r.ROCAKrrs, A^. 



Ultimate ilivision^^ oriVoml repeatcHlly tbrkcil, beariiii;" very iiinnrKuis 

 small receptacles. 

 Var. SPIRALIS. 



Fronds short and spirally twisted. 

 Everywhere common between tide-marks. 



The varieties of this very common spccios aro so nuincroiis that it is useless to dr- 

 seriUe the greater part of them. The southernmost limit of tlio species on the eastern 

 coast is, aij far as known, the coast of North Carolina, where it is reported to have been 

 collected by Rev. E. M. Forbes in Curtis's account of the botany in the Geological and 

 Natural History Survey of North Carolina. Fuats blcornis and F. mkrophi/Uus of Do la 

 IVlaie -appear to be merely forms of F. veniculosus. The species with which the present 

 is likely to be confounded along our northern coast is F. er-ancureiiM, a broad plant, whoso 

 midrib is only distinct in the lower part of the frond, and whose conceptacles are her- 

 maphrodite, not dia^ious, as in the present species. It fruits most abundantly in autumn 

 and winter, but the fructitication can be seen at any season of the year. 



F. CERANOIDES, L.j Fbyc. Brit, PI. 271. 



"Frond plane, coriaceo-membrauaceous, linear-dicbotomous, mid- 

 ribbed, without vesicles, margin very entire; lateral branches narrower 

 than the principal divisions, repeatedly forked, level topped, bearing 

 fruit at their apices ; receptacles spindle-shaped or bifid, acute." (Xer. 

 Am. Bor., Vol. I, p. 70.) 



New York, J-f/arJ//; Euroi^e. 



The authority for the existence of this species on our coast is Agardh. Harvey had 

 never seen American specimens, nor have we ever found any. The species, judgiug 

 from herbarium specimens, resembles very closely L. vesiculosm, especially var. lateri- 

 fructus, but is said to be thinner and to be destitute of air-bladders. It inhabits rather 

 brackish waters. 



F. SERRATUS, L.J Fhyc. Brit., PI. 47; r:tudes Phycol., Pis. 11-14. 



Fronds dittcious, two to six feet long, midrib distinct throughout, 

 margin serrate ; bladders wanting ; receptacles serrate, flattisb, pointed. 



Xewburyport, Mass., Captain Pike; Pictou, X. S., Ecv. J. Fowler; 

 1 Europe. 



A very common species of Europe, but very rare on our coast, being known in only 

 '. o localities. In the suj)plement to the Nereis it is reported from Ncwburyport, hav- 

 ing been once detected by Captain Pike, but not seen there since. The only other 

 locality is Pictou, where it was detected by Rev. J. Fowler, who sent specimens to 

 T'loffsjMjr Eaton in 18G9. The species is easily recognized by its serrated margin, and 

 _.ow8 lower down in the water than F. veniculoaus. 



F. EVANESCENS, Ag., Icon. Incd., PI. 13. (Fucus platycarpus^ in Far- 

 low's List of the Marine Alga? of the United States.) 



Fronds liermaphrodite, one to two feet long, stipitate, midrib distinct 

 below, but widening and scarcely visible in the upper part, margin broad, 

 entire, somewhat wavy; bladders usually wanting, when present much 



