See. MELANOSPERMEiE. ( 79 ) Fam. DICTYOTEJ:. 



Plate CLVII. 

 TAONIA ATOMARIA.— ^^. 



Gen. Char. — Frond highly reticulated, flat, subflabelliform, entire, or more or less irre- 

 gularly cleft or laciniated. Fructification : spores, arranged in transverse bands 

 or sori, somewhat prominent or sub-immersed in both sides of the frond. Name 

 from Tacor, "a peacock," alluding to the spreading form of the frond, and the 

 zonate bands of fructification. 



Taonia atomaria. — Frond flat, obcuneate or subflabelliform, more or 

 less cut into linear lacinise ; fructification forming irregularly waved, 

 often interrupted, transverse or concentric lines. 



Taonia atomaria. — /. 6. Agardh, Sp. Gen. Alg. vol. i. p. 101 ; Harv. Man. 

 p. 38 ; Harv. Syn. p. 32 ; Atlas, plate 9, fig. 36. 



DiOTYOTA atomaria. — Grev. Alg. Brit. p. 58 ; Hook. Br. Fl. vol. ii. p. 280 ; 

 Wyatt, Alg. Danm. No. 60; Endl. 3rd Suppl. p. 24; /. Ag. Alg. 

 Medlt. p. 37 ; Menegh. Alg. Ital. vol. i. p. 229 ; Harv. P. B. plate 1. 



DrcTYOTA zonata. — Lamour. Ess. p. 57. 



DicTTOTA ciliata. — Lamour. Ess. p. 58. 



ZoNAKiA atomaria. — Ag. Sp. Alg. vol. i. p. 128 ; Ag. Syst. p. 264 ; Gi-ev. Fl. Edin. 

 p. 298; Gray, Br. PI. vol. i. p. 341. 



Padina atomaria. — Montag. Fl. Canar. PI. Cell. p. 146. 



Padina phasiana. — Bory, Fl. Pelop. p. 75. 



Stypopodium atomarium. — Kutz. Phyc. Gen. p. 341. 



Ulva atomaria. — Woodw. in Linn. Trans, vol. iii. p. 63 ; Eng. Bot. t. 419. 



Ulva serrata. — De Cand. Fl. Fran. vol. ii. p. 11 ; Encycl. Bot. vol. viii. p. 166. 



Hab.— On rocks in the sea. Rare. Annual. Summer. At Cromer (Mr. Wigg); 

 Carton and Gunton {Mrs. Fowler) ; Warms' Head, Glamorganshire {Mr. Dillwyn) ; 

 Coast of Devon {Mrs. Griffiths) ; Sussex {Mr. Borrer) ; Frith of Forth {Br. Greville) ; 

 Ballycotton, Cork {Miss Ball). 



Geoqr. Dist. — West Indies {Lamour.) ; Canary Islands {Despreaux) ; Mediterranean 

 Sea {Agardh) ; German Ocean ; Atlantic coasts of France and Spain. 



Description. — Root, a flattened mass of tangled woolly fibres. Fronds 

 much tufted, four to twelve inches long, and from half an inch to two or 

 three inches wide at the summit, very thin and membranous, somewhat 

 translucent, from a narrow base gradually widening to the apex, the 

 edges generally entire or laciniato-dentate, sometimes slightly sinuated, 

 the apices truncate, sometimes nearly entire, but most frequently more 

 or less torn or laciniated irregularly, sometimes divided for a short 



