Seb. MELANOSPERME.E. ( 99 ) Fam. DICTYOTEiE. 



ASPEEOCOCCUS TUENEKI.— ITooA;. 



Gen, Char. — Frond membranaceous, simple, tubular, cylindrical or compressed. Fructi- 

 fication : external, minute, roundish ovate spores collected in little groups or sori, 

 mixed abundantly with club-shaped filaments, and scattered over the whole surface 

 of the frond. Name improperly formed from the Latin aspo; "rough," and the 

 Greek k6kkos, "fruit," in allusion to the roughness formed on the surface by the 

 fructification. 



AsPEROCOccus Turneri. — Frond cylindrical, tubular, inflated upwards, 

 very obtuse, and suddenly contracted at the base into a short cylin- 

 drical stem; sori roundish. 



AsPEROCocous Turneri— Hook. Br. Fl. vol. ii. p. 277; Wyatt, Alg. Banm. No. 59 ; 

 Harv. in Mack. Fl. Hib. part 3, p. 175 ; Harv. P. B. plate 11 ; 

 Harv. Man. p. 42; Harv. Syn. p. 37 ; Atlas, plate 12, fig. 45. 



AsPEROCOccus hullosus. — Lamour. Ess. p. 62, t. 6, f. 5 ; Grev. Alg. Brit, p. 51 ; 

 Endl. 3rd Suppl. p. 26 ; /. Ag. Alg. Medit. p. 41 ; Menegh. Alg. 

 Ital. et Balm. p. 166 ; J. G. Agardh, Sp. Gen. Alg. vol. i. p. 77. 



ASPEROCOCCUS rugosus, fi hullosus. — Duly, Bot. Gall. vol. ii. p. 956. 



Enc^lium hullosum. — Ag. Sp. Alg. vol. i. p. 146 ; Syst. p. 262; Spreng. Syst. Veg, 

 vol. iv. p. 328 ; Kiltz. Phyc. Gen. p. 326, t. 21, f. 1. 



GiSTRiDiuM opuntia. — Lyngb. Hyd. Ban. p. 71, t. 18. 



Ulva Turneri.— Dillw. Eng. Bot. t. 2570. 



Hab.— On stones and the larger Algae, in the sea, often to the depth of six fathoms. 

 Annual. Summer and autumn. All round our coasts. 



Geogr. Dist. — Atlantic coasts of Europe from Norway to Spain {Lyngb.) ; Baltic ; 

 Mediterranean and Adriatic Seas ; Southern Ocean {Agardh). 



Description. — Root, a minute flattened disc. Stem short, cylindrical, 

 three to eight lines in length, and a quarter of a line in thickness, 

 suddenly becoming inflated into an oblong or cylindrical frond, com- 

 monly from six to twelve inches in length, and from half an inch to 

 an inch and a-half in diameter, but occasionally from sixteen to forty- 

 two inches in length, and two to four inches in diameter, generally more 

 or less cylindrical, but often with occasional inflations and contractions, 

 and frequently more or less curved or twisted and plaited. Structure 

 consisting of rather small quadrate cells, forming the periphery, and 

 lined internally by an open network of bars or nerves, forming large 

 irregularly polygonal meshes or cells, somewhat in the manner of the 

 nerves on the back of some leaves or in the wing of a di-agon-fly. Sub- 

 stance membranous, rather flaccid when young, and more or less adhering 



