( 0LLIN8 \\l> m i:\ El , 



Var. secunda Harv. comb. now; B. plumosa var. $ecunda Harvey, 

 L858, p. 31, PI. XLV. A, figs. 1 3; B. Haneymut Collins, 1909, p. in:,. 

 This variety Bhows b certain dorsiventral arrangement, the ramuli 

 on both edges of the rachis curving towards each other on one side. 



Var. Leprieurii (Kutc.) comb. dOv.; B. Leprieurii Kutzing, 1849, 

 p. 190; L856, p. 27, PI. LXXV, fig. 2; Collins, L909, p. mi. In this 

 variety the ramuli arc in short secund series, separated by short vacant 

 Bpai • 



Family DERBESIACEAE. 

 Derbesi \ Solier. 



1. Filaments 100-600 /* diam. 3. I). Lamourouzii. 



1. Filaments le&s than 100 /i diam. 2. 



2. Filaments -K >-.">() n diam., dichotomously branched. 



1. I), vaucheriaeformis. 



2. Filaments 50-70/1 diam.. simple or with short lateral brand 



2. 1). marina. 



1. D. VAUCHERIAEFORMIS (Harv.) J. G. Agardh, 1886, p. 34; 

 (Ollins. 1900, p. 406; D. tenuissima Farlow, 1881, p. 60, PI. IV, fig. 1: 

 Chlorodesmis vaucheriaeformis Harvey, 1858, p. 30, PI. XL. D. On 

 Dictyopteris Justii, Gravelly Hay, Aug., Collins. With sporangia. 



2. D. marina (Lyng.) Kjellman, 1883, p. L6; Collins, L909, p. W7; 

 Vaucheria marina Lyngbye, 1S19, p. 70, PI. XXII. On Aoantho- 

 pkora sj/ic/fcra, Hungry Bay, May, Collins. With sporangia. 



3. I). LAMOUROUxn (J. Ag.) Solier, 1847, p. 162, PL IX. figs. 18- 

 30; Collins, 1909, p. 107; P. B.-A., Xo. 2168; Bryopais BoUnsiona var. 

 Lamourouxii J . G. Agardh, 1S42, p. IS. Castle Harbor, near landing 

 at Tucker's Town. March, Ilervey. The fronds arc much stouter than 

 in the two other species of the genus, sometimes simple, sometimes 

 with a few irregular tufts of ramuli. Old and denuded plants of 

 Bryopsis have some resemblance to it, but always -how the scars of 

 fallen ramuli. 



Family CAULEBPACEAE. 



( ' wi.kki'a Lamouroux. 



1. Stolon and fronds filiform, without distinct ramuli. 1. C. fastigiata. 

 1. Stolon ami fronds different in character. 2. 



Frondfl very -lender, ramnli whorled, near the summit. 3. 



2. Fronds Stouter, ramnli not in distincl whorls. 4. 



