11 s < 0LLIN8 \\D in i:\ El . 



3 I mini decumbent, rooting, densely matted. l. L. perforate, 



:;. Frond erect. I. 



i. Outline of Frond and of main divisions narrowly pyramidal. 



I. ( Nitline l>ro;t<lrr. 



B. Slender, 3 or i cm. high. L. obtusa var. L r elatin<>-a. 



;>. Stout, 1-2 dm. high. t'». L. paniculate. 



Branching mostly opposite or whorled. •". I., obtusa. 



6, Branching subdichotomous, coryml \. I., cervioornis. 



1. L. perforata Montagne, I860, p. 1 55; Kutzing, L865, p. is, 

 PL XL IX. 1 L P. B.-A., No. L889. Bailey's Bay, Jan., Harris 

 Bay, Jan., Nov., Gravelly Bay, Oct., Hervey; Tucker'- Town. M 

 South Shore. Aug., Collins. This species occur- not uncommonly in 



caves and potholes, where it forms dense matted masses, the filament- 



adhering to the rock and to each other by numerous holdfasts. The 

 surface of the mass sometimes has an iridescence of remarkable 

 brilliancy, chiefly in metallic blues and greens. The iridescence is on 

 the upper surface only, and persists for a short time after the plant is 



taken from the water. 



2. L. Poitei (Lamour.) M. A. Howe. 1905, p. 583; L. tuberculosa 

 .1. (.. Agardh, L852,p.760; P. B.-A.,No. 19.37. L.gemmifera Harvey, 

 L853, p. 7-\ PI. XVIII. B.; Fucus Poitei Lamouroux, L805, p. 63, PL 

 XXXI, figs. 2-3. Harrington Sound, Farlow; Cooper's Island, a 

 slender form, Wadsworth; Heron Bay, April, Hervey; Fairyland, 

 July, Collins. In warm shallow water, where it form- loose-lying 

 masses in warm weather. L. tuberculosa ha- been described by J. G. 

 Agardh as "fronde compressa distiche decomposito-pinnata," l»ut it 

 may well he that the compression and distichous branching in Agardh's 

 plant are due to the manner of preparation; the Bermuda plant has 



no such character-. 



3. L. pamllosa (Forsk.)Greville,1830,p.LH; P. B.-A.,No. 1936; 

 Fucus papUlosus Forskal, L775, p. 190. Castle Harbor, Farlow; 



Harris Bay, Jan., Heron Bay, April, Hervey; Jew's Bay, July, 

 Cooper's Island, Harrington Sound, Aug., Collin-. Quite common 

 and usually easily recognizable. 



1. L. CEBVICORNIS Harvey. L853, J). 73, PI. XVIII. Cj P. B.-A., 



No. -Ms". Wadsworth, No. L9; Mi-- Wilkinson; Cooper'- [sland, 

 April, Aug.; dredged in 1 m., Dec. Collins; Buildings Bay, April, 



St. David's [sland, May, Hervey. This Species appear- to he little 



known to European botanists; De Toni, L903, p. 781, gives it a- a 

 synonym under L. implicata*, hut ii is certainly not the L. implicata 

 of Harvey, L853, p. 7_\ PI. XVHI. !>.. fide authentic specimens. L. 



