128 SQUAMARIE^. 



I. POLYIDES. Ag. 

 This beincf the only genus, the character is the same as that of the Order. 



1. Poly ides rotundus, Grev. Alg. Brit. p. 70, t. 11. Harv. Phyc. Brit. t. 95. 

 Polyides lumbricalis, Ag. Sp. Alg. 2, p. 392. Spongiocarpus rotundus^ Gi'ev. Fl. 

 Edin. Furcellaria lumbricalis, Kiltz. Sp. Alg. p. 748. Phyc. Gen. t. 72. Fucus 

 rotundus, Turn. Hist. t. 5. E. Bot. t. 1738. 



Hab. Boston Bay, Mr. G. B. Emerson, Capt. Pike. Newport, Rhode Island, 

 Prof. J. W. Bailey, (v. v.) 



Poot a spreading disk. Fronds several from the same base, two or more inches 

 high, as thick as crow-quill, rising with an undivided stipe to a third or a fourth of 

 the height, then forking, and afterwards repeatedly dichotomous. The axils are 

 rounded, the apices somewhat attenuated and sub-acute, of equal length, giving the 

 frond a fan-shaped outline when spread on paper. Colour a very dark red brown. 

 Substance cartilaginous. It does not adhere to paper in drying. 



Our American specimens are of small size, about two inches high, and are not in 

 fruit. In all characters of structure, &c. they are the same as the European. 



Order YII. SQUAMARIE^. 



Squamariew, J. Ag. Sp. Gen. and Ord. Alg. 2, p. 485. Part of Spongiocarpece, J. 

 Ag. Alg. Medit. Harv. Man. ^c. Part of Chcetophorem and Porphjreoe, Kiltz. 



Diagnosis. Lichenoid, encrusting or horizontally expanded red-brown seaweeds, 

 rooting by the under surface, composed of vertical filaments closely set in firm 

 gelatine. Spores in moniliforin strmgs lodged in external wart-like excrescences 

 formed of vertical, confervoid filaments. 



Natural Character. This Order is designed to include several anomalous 

 Algae which agree in a common habit, so far as the frond is concerned, but whose 



