Ser. Melanosperme*. Fam. Bictyotea. 



Plate LXXV. 



CUTLERIA MULTIFIDA, Grev. 



Gen. Char. Root clothed with woolly fibres. Frond flat or compressed, 

 cartilagineo-membranaceous, ribless, somewhat fan-shaped, irregularly 

 cleft or dichotomous. Fructification, dot-like tufts of pedicellate 

 utricles, scattered over both surfaces of the frond ; each utricle con- 

 taining several spores. Ant7ieridia on distinct plants, linear, trans- 

 versely dotted, sessile on the sides of minute tufted filaments, occu- 

 pying the position of true sori. Cutleria (Grev.), — in honour of 

 Miss Cutler, of Sidmouth, a distinguished British Algologist. 



Cutleria multifida ; frond thickish, polymorphous, flabelliform, irregularly 

 cleft into numerous narrow lacinise; axils very acute; apices atten- 

 uated, pencilled. 



Cutleria multifida, Grev. Alg. Brit. p. 60. t.10. Hook. Br. Tl. vol. ii. p. 281. 

 Wyatt.Alg. Danm. n. 61. Harv. in Mack. Fl. Hib. pt. 3. p. 177. Harv. 

 Man. p. 29. /. Ag. Alg. Medit. p. 40. Menegh. Alg. Ital. et Balm. p. 201. 

 Endl. 3rd Suppl. p. 25. Kilt 2. Phyc. Gen. p. 339. Bickie, Ann. Nat. Hist. v. 

 14. p. 168. 



Zonaria multifida, Ag. Sjp. vol. i. p. 135. Syst. p. 267. 



Dictyota penicillata, Larnour. in Besv. Journ. Bot. vol. ii. p. 41. Bamour. Ess. 

 p. 58. Ag. Sp. Alg. vol. i. p. 139. 



Dictyota multifida, Bory, Moree, p. 75. no. 1756 



Sporochnus multifidus, Spreng. Syst. Veg. vol. iv. p. 329. 



Ulva multifida, Sm. Eug. Bot. 1. 1913. 



Hab. On rocks and shells in the sea, in 4-15 fathoms water. Annual. 

 Summer and autumn. Rare. Yarmouth, Mr. Turner and Mr. Wigg, 

 Seaton and Torquay, Mrs. Griffiths. Sidmouth, Miss Cutler. Brighton, 

 Mr. Borrer. Plymouth, Rev. IF. S. Hore. Bantry Bay, Miss Hutchins. 

 Ballycotton, Miss Ball. Kilkee and Wicklow, IF. H. H. Round- 

 stone Bay, Mr. Me Calla. Not found in Scotland ? 



Geogr. Distr. Coasts of England and Ireland. Atlantic shores of France and 

 Spain. Mediterranean Sea. 



Descr. Root an expansion, densely coated with woolly, jointed, branching fibres. 

 Frond from two to twenty inches in length, having a broadly wedge-shaped 

 or fan-shaped general outline, but very variable in its minor divisions. The 

 base is always broadly wedge-shaped, tapering into a short stem from a 

 quarter to half an inch in length. The frond expands upwards, and is then 

 often cleft into numerous wedge-shaped lobes, each of which is repeatedly 

 and very irregularly ineised from the apex downwards, the ultimate Laciniffi 

 being gradually narrower, and the apices acute. In some specimens the 

 whole frond is cleft nearly to its base into narrow, irregularly dichotomous 

 ribbons, from half a line to a line in breadth ; in others the laeini;c are from 

 half an inch to an inch broad, and do not extend below the middle of the 

 frond. In some the apices are regularly fastigiate, and the outline oearrj 

 circular ; in others they are of very various length. When in a perfed Btate 

 tin; apices terminate in pencils of delicate jointed filaments (fig. 4), and a 

 net-work of similar, but branching, filament- extends over the whole surface 



