120 »] UN8 wi» III RVET. 



case arc they quite typical /.. setaceot thai it seems best t<> consider 

 them merely form- of the common and variable L. obhtsa. A specimen 

 in the Farlow herbarium, collected by G, Tucker, No. K>. Is Dear 

 /. mplicataJ. G. Agardh, 1852, p, 745, and a similar form was found 



on the outer reef, Ely's Harbor, -Inly. Collin-, ami this also we ] 

 considered as a local form of L. obtusa. This form is found rather 



commonly when dredging. 



6. L. paniculate Ag.) J. G. Agardh, 1852, p. 755; Ckondria 

 obhtsa var. paniculate Agardh, L822, p. 343. Faxon; Dingle Bay, 

 Jan., Buildings Hay, Mangrove Bay, Feb., Hervey. Connected by 

 intermediate form- with L. obtusa, but in it- typical form quite dis- 

 tinct by the firmer, little adhesive substance, the narrowly pyramidal 

 form of the frond and of it- principal divisions, the main axis distinctly 

 projecting. 



Choxdria Agardh. 



1. Rhisoids frequent; tetraspores in specialized branches. 4. C. polyrhiza. 

 1. No rhizoids except at extreme base; tetraspores in normal branches. 



2. Ends of pericentral cells showing as a wavy line across the frond. 



1. C. curvilineata. 



2. Pericentral cells not showing externally. 3. 



3. Ramuli acute or subacute. 3. C. atropurpurea. 



3. Hamuli Munt or truncate. 2. C. dasyphylla. 



1. C. curvilineata sp. nov.; P. B.-A., No. 2039. Fronde tenui, 

 axibu- principalibus diametro ) mm. raro superantibus, ramos pauUo 

 minores paucos pluresve alternantes ferentibus, ordinum duorum, 

 raro plures, cylindricos vel ad basin et apicem paullo contrai 

 puncto vegetationis ad fundo foveae apicalis, folia brevia ferente; 

 foliis similibus secundum ramos sparsis; segmentis diam. duplo loni;i- 

 oribus; cellulis corticalibus diam. duplo longioribus; apicibus cellu- 

 laruni ccntralium per corticem manife-ti- ut [ineis CUTvis, latere 

 convexo apicem versus; cystocarpiis sessilibus; substantia submolli; 

 colore rubro obscuro. Plate II. figs. 10-11. 



Frond slender, main axe- seldom reaching \ mm. diam., with more or 

 less numerous alternate branches of two order-, seldom more, of only 

 slightly less diam., cylindrical or slightly contracted at base and apex; 



ring point at bottom of an apical pit, with a tuft of short Lea 

 similar leaves occurring also at scattered point- on branches; 



nieiits about 2 diam. long; cortical cells about twice a- long a- broad; 



swollen apices of pericentral cells showing through the cortication as 



