DUBLIN MICROSCOPICAL CLUB. 415 



Mr. Moss exhibited a section which he had made of the quartz-rock 

 of Shankill, and pointed out that this rock, which is realh-^ a sand- 

 stone, consisted of rounded grains of quartz, held together by a 

 siliceous cement, corresponding to the quartz-fragments in optical 

 properties when examined by polarized light. The specimen con- 

 tained numerous opaque specks of irregular form, apparently ler- 

 ruginous, as a chemical analysis of this rock had revealed the 

 presence of a notable quantity of iron. 



Neio species of Glosterium, exhibited. — Mr. Archer exhibited a 

 seemingly undescribed species of Glosterium. Small, comparatively 

 stout, curvature slight, inflated at the middle, gradually tapering, 

 though still thick towards the apices, which are blunt, rounded ; 

 membrane smooth and colourless ; endochrome a single longitudinal 

 band, not plicated; each loculus, containing usually but a single 

 moving granule, forming a rounded cavity in the plasma, at some 

 distance from the apex. All the other smooth species are greatly more 

 curved and the apices more attenuated and by no means so broadly 

 rounded as in this new form, which might stand as Glosterium 

 monotaBniwm. 



Will May, 1876. 



Ectocarpus Farlowi, Thuret, and a very problematic algal pro- 

 duction collected by the late Professor Harvey, exhibited. — Professor 

 E. P. Wright exhibited a pretty species of Ectocarpus, named by 

 the late M. Thuret after Mr. Farlow, assistant to Professor Asa 

 Gray ; the specimens exhibited had been collected by Mr. Parlow 

 at Eastport, October, 1875. Dr. Wright also exhibited a very 

 paradoxical algal production, collected by the late Professor Harvey 

 on mangrove stems, at Yavau, Friendly Islands. But a i&\Y 

 specimens were obtained, and the only record made — beyond the 

 date and locality — was 99. " ? ? Alga ? quam maxime paradoxal " 

 Tbe form was certainly a paradoxical one — a mass seemingly made 

 up of linear, truncate green cells, forming a confused congeries ; 

 without fresh specimens preserved in fluid it would be impossible to 

 do more than suggest that it had affinities to such genera as Hydro- 

 dictyon or Pandorina, but then something of its reproduction 

 should be known ere it would be safe to include it in that section 

 of Zygosporese with conjugation of the " swarm-cells." 



Structure of leaves of Abies Veitchii, Lindl., and of the species so 

 called in gardens, lohich are really distinct. — Dr. McNab exhibited 

 transverse sections of the leaves of Abies Veitchii, Lindl., and 

 of the species called Abies Veitchii which he had received from 

 Messrs. Veitch, of Chelsea, and other nurseries and gardens. Ahies 

 Veitchii, Lindl., has the resin-canals in the parenchyma of the leaf, 

 and has hardly any hypoderma ; the leaf is blunt, and in many 

 respects like that of Abies Fectinata, D.C. The Abies Veitchii 

 of gardens is a distinct species, with the rcsin-canals close to the 

 epidermis ol' the under side of the leaf and with the hypodcrrn ex- 

 ceedingly well developed. The leaf is more like that of Abies 

 Cephalonica, with a sharp, generally bifid apex, and not like A. 



