Micromega.] ALGiE DIATOMACEJE. 411 



line in height, once or twice branched, investing various Algae, but par- 

 ticularly Dumontia fiL 'for mis, with a minute, but fine yellow fringe. When 

 dry, it is green. 



108. Homceocladia. Ag. Homceocladia. 



Frustula arranged in numerous, lunate, distant, parallel 

 series, within a tubular frond. Ay. — Name ; 'o/xo/o;, like or re- 

 sembling, and xXubog, a branch ; I presume from the branched 

 fronds. 



1. H. Anglica, Ag. (English Homceocladia); filaments thrice 

 dichotomous. 



"Plymouth," Agardh. — " Frond an inch and a half or more in length, 

 tubular, terete, erect, filiform, about one line thick at the base, gradu- 

 ally attenuated, containing numerous distant, parallel series of frustula, 

 trichotomous below, dichotomous above, obtuse at the apices. C'< lour 

 when dry opaque, olivaceous-green. Substance firm. It does not adhere 

 to paper." Ag. — Of this plant I am quite ignorant, nor does Agardh men- 

 tion from whom he received it. One other species is described, a native 

 of the Adriatic. 



109. Berkeleya. Grev. Berkeleya. 



Frustula in longitudinal series, within simple mucous fila- 

 ni< nts, which are free at the extremity, but united below into a 

 roundish gelatinous mass. — Named in honour of the Rev. M. 

 J. Berkeley, A.M., an assiduous and accomplished British Bo- 

 tanist, author of " Gleanings of British Alya'T 



1. B. fray 1 1 is, (J rev. (brittle Berkeleya.) Grev. Crypt. Fl. 

 t. 294. Ag. Conspect. Crit. DiaL p. 24. 



Parasitic on Zostc/a niariuu, Fur evil ' nia f(isti«'uita y See. Appin, dipt. 

 Curm'ulhicl. fippjngir- I'laut forming a roundish or oval, firm, gelatinous 

 ina.-o, of a brownish or olivaceous-green colour, and nearly half an inch 

 in diameter; from the substance of which issue numerous gelatinous, 

 .simple, tender, i\(jv, gradually attenuated filaments, apparently destitute 

 of external membrane, ami containing fusiform frustula. 



110. Mh RaMEGA. Ag. Micromega. 



l : rushtbi arranged in longitudinal series, within a cartilaginous 



Or gelatinous frottd. Ay Named from ti/x-o:, small, and Layx;, 



b/rt/r ,• in allusion to llu- frond le-M-mlding some of tin- IsfgSC 



Alg;e. but composed internally of the frustula of the smallest 



hinds. 



1. M. qpiculdtum, Ag. (apiculdted Micromega ji fronds fili- 

 form dichotomous or fasciculate, incrassated :i1 "' obtuse al the 

 extremities, which are apiculate. Aa. Conspect. ('/it. Dint. 

 p. l':>. —SchizofH ma apiculatum, Ay. Sj/st. . \ly. j>. 1 1. — Gloionema 

 apiculattttn, Grev. Crypt. FL t. :ln. — Monema apicukUum, Grev. 

 I. < . < $ynop$. ) p. 38. 



