30 



branched, free or surrounded by gelatine. Contains three large 

 genera, namely — 



I. Conferva. Pliny. 



II. C.aaioEora. Kinzig. 

 III. Chaetophora. 



Gents I. — Conferva, P^ 



C. crenulata, Web.; Beverley. 



C. c.":~: e)::y >-. Vineer.: Xewbuigh, &c. 



C. f> : ::f:: i."R::h. : N:::h Carina: 



C. -:.: :5.;:. Ag. ; N. C. 



C. : : :: ::' :.:. Ag. : Re: :e is". 3.:::.. 



C . rivularis, Linn. ; common. 



C. area, Dillwin ; Seaconnet. 



Cfracta; Newport. 



C. glomerata, Linn; lakes. 



C. serpentilum, Ag. ; North Carolina. 



1 Sp. ? or new. 



II. Cla~o?h:ea. Kir.z. 



C. loiteiirens, Diiiwin : Ba'.terv, X. Y. 



C. arctz, Dill win : _Vew York Bav. vkc. 



C. -'•:;:_::. Ag. : New York Bav"' 



C. i'.auci.scerJ. GrEERns : Lcr.g'Island Soee: 



C. hzzil-.s. G:;eee.s: >V.v Y::e Bav. 



C.rupesfris, Linn.; Mass. Bay. 



C. e *■;.'■-': ' .- Kev Wes:. 



C. : ■'\i'.a:r r :.'.is. H: : : e vla::d. 



C. ir'KicAS, 



12 .S r '. ; c: new. 



III. Ceeetophora. 



C. -aYf/:":;:. Ag. : P:agl:Eee: 



Order III.— ULVACE.E. 



Frond, expanded membranes :. tabes. Green or purple. Con- 

 tains four genera, namely — 



I. Enteromorpha, Link. — Name. tinkraU. 

 II. U'.va. L.-.r. 



III. PoroEvra. Ag. — X .me, purple. 



IV. BaEgia. Lvngb. 



Gents I. — Enteromorpha. Link. 

 E- mtestmalisj Lamour ; common. 

 E . c : ". : - -:sS'Z. Lam. : c ommon. 

 E. erecta, Lvngb. : lYew Y::.: I ?.v. 

 E. clathrata, Roth.; New York Bay. 

 2 Sp. ? or new. 



