334 Froccedings of the Boyal Irish Academy. 



branous above. iEargin irregularly ramnlous. Frustulcs in files, fe^r^ 

 sub-distant. Yalve elliptical, delicately stiiate." "VTm. Smith. IS'ot 

 unlike the last, except that it is more delicately striate, shorter, 

 broader, and more rounded at ends. 



Kiitz. Bac., p. 115, T. xxvi., fig. 9. '^nx. Sm., B. D., Tol. ii., 

 p. 75, PL Ivii., fig. 360. Eab. Fl. Enr., sect. 1, p. 268. — Micromega 

 mucosum, Ealfs, in Priteli., p. 933. 



"With seaweeds. Galvray. Dr. David ^Joorc. !Malahide, Howth, Co. 

 Dublin. 



Scliizo'nema ramosissimum, (Agardh.) Marine. 



" Frond filifomi, much divided from the base, and irregularly sub- 

 membranous by cohesion above. Hamuli short, obtuse. Fmstules 

 numerous, in closely packed files. Talves elliptico-lanceolate, acute.'' — 

 "Wm. Smith. Striaj fine, linear. 



Agardh. Syst., p. 11. Harvey's Manual, p. 210, Tvho, according 

 to Smith, had the opportunity of inspecting authentic specimens. 

 Wm. Sm., B. D., Yol. ii., p. 78, PL lix., fig. 369. Eab. PL Eur. 

 p. 272. — ilicromesa ramosissimum, Agardh. Consp.. p. 22. Ealfs, in 

 Pritch., p. 934. 



Xear Lame, Carnlough, Co. Antrim, collected by Dr. David 

 Moore. 



(ff). Frustides having radiate strice. 



Schizonema greciUii, (Agardh.) Marine. 



" Prond filifonn, much divicled from the base, TTltimate ramuli 

 acute, larger divisions -with several files ; ultimate ramuli with a single 

 file of frustules. Yalve lanceolate." — TTm. Smith. Strife fine, gently 

 radiate. On the fi'ont view, frustules are very wide, q^uadrangular. 

 The side view appears neaiiy as fai' as the median line. The central 

 nodule thus seen is depressed. The connecting band exhibits longitu- 

 chnal lines. (PL 29, fig. 19.) 



Agardh. Conspect.. p. 19. Kiitz. Bac, p. 114, T. xxvi., fig. 4., 

 T. v., fig. 1. Vm. Sm., B. D., Yol. ii., p. 77, PL Iviii., fig. 364. 

 Ealfs, in Pritch., p. 928. Eab. PL Eur., sect. 1, p. 267.— Schizonema 

 C[uadiipunctatum, Haiwey's Manual, p. 214. 



Lame, Carrickfergus, Co. Antrim, collected by Dr. David Moore. 

 Malahide, Menion, Co. Dublin. Eiver Xannvwatcr. near Laytown, 

 Co. Meath. 



Schizonema helmintosion, (Chauvin.) Marine. 



" Prond filiform, or by cohesion irregularly sub-membranous ; much 

 and irregularly divided; ultimate divisions short, abrupt." — Wm. Smith. 

 Frustules linear, elliptical, sometimes sharp, sometimes more rounded 



