V. HELMINTHOCLADE.E. 139 



Hab. Sand Key, Florida, W. H. H. (v. v.) 



Frond about three inches long, about as thick as sparrow's quill, with a leading 

 stem set at short intervals with branches an inch or two in length, spreading to 

 all sides, the lowest short, the middle ones longest, the rest shorter upwards. 

 Branches mostly pinnated, sometimes forking or sub-bipinnated, the larger ones 

 occasionally more compound, all the divisions very patent. Rarmdl opposite or 

 alternate, cylindrical, obtuse. When dry, the frond, as usual, becomes compressed 

 and loses colour ; the older aud more coated parts turn white, the younger change 

 to a dark reddish brown ; under the microscope exactly a " pepper and salt," or 

 mottled with specks of white and brown. The peripheric threads are simpler, less 

 regularly forked, and more cylindrical than in the preceding species, their cells 

 being scarcely constricted at the ends. Colour when growing, a pale i)inky red. 

 Substance cartilagineo-gelatinous. In drying, it closely adheres to paper. 



Plate XXXI. B. Fig. I. Liagora pinnata ; the natural size. Fly. 2, part of a 

 branch ; jig. 3, peripheric and axial filaments ; fig. 4, a peripheric filament ; fig. 5, 

 apex of the same ; all more or less magmfied. 



3. Liagora ceranoides, Lamour. ; " frond compressed, canaliculate at one side 

 from the base to the apex, dichotomously branched, fastigiate, clothed with a 

 continuous crust, apices forked, sub-diverging, the younger ones purplish red." 

 /. Ag. Sp. Alg., vol. 2, p. 42G. 



Hab. Vera Cruz, Liehman. 



It must be borne in mind that the above description has been made from dried 

 specimens, and the compressed., canaliculate frond may refer only to the dried plant. 

 I am not acquainted with this species, which is said to agree with L. viscida in size 

 and ramification. 



* * 



Fronds covered with a powdery calcareous deposit. 



4. Liagora leprosa, J. Ag. ; frond terete, (compressed when dry) repeatedly 

 dichotomous, fastigiate, with rounded axils, covered with a pulverulent calcareous 

 deposit, whitish when dry, with the ends of the branches greenish ; filaments of 

 the periphery flabelliform in outline, excessively di-trichotomous, moniliforra, the 

 ultimate cellules very minute. J. Ag. Sp. Alg. 2, p. 427- KUtz. Sp. Alg., p. 539. 

 (Tab. XXXL C.) 



Hab. Vera Cruz, Liebman. Sand Key, W. 11. H. (v. v.) 



Frond tufted, one to two inches high, as tliick as sparrow's quill, terete when 

 recent, compressed or channelled at one side when dry, repeatedly and very regu- 



t2 



