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Sorao additional Desmidiese, a few of them new, from tho late Galway gatherings p. 199202. 



Three very "olosely allied" and m.uoh resembling minuts forms of Cosmarium p. 421. 



Dictyosphserium eonstrictum p. -122. 



Tlie Cylindrooystis detected some years ago. p. 422. 



1873 v. 13: A gathering made near "Toole's Rocks" oontaining various Conjugatse, includingDesmidiese, remarkable 



for the great number of distinot species simultaneously presenting themselves therein in conjugated state p. 99100. 

 A very minute form of Euastrum [Euastrum elegans /; angustatum Wittr.] p. 101 & 102 103. 



A very pretty Cosmarium [Cosmarium speoiosum Lund.] p. 101. 



A sketch of a remarkable zygospore, hardly to de doubted to be desmidian p. 103. 



The Freshwater Algaa of Gotland and Oland, by Dr. W. B. Wittrock. Translated in abstract with notes p. 



117-139. 



Several rare Desmidiese taken in Westmoreland and North Wales p. 212213. 



Structure of Zygospore of Xanthidium armatum p. 310 311. 



- Staurastrum Ophiura, Luudell. new to England. p. 811. 



Euastrum binale, var. angustatum Wittr. and E. binale var. insulare, Wittr., their occurencc in Ireland. p. 315. 



- Cosmarium tetrachondrium. Luud. new to England p. 315. [g]. 



- New localities for Closterium Aroherianum (Cleve) and Cl. Cynthia do Notaris p. 319. [g]. 



Euastrum binale var. insulare Wittrook p. 434. 



Zygospore of Staurastrum Brebissonii. p. 435. [g]. 



- 1S74 v. 14: Algae and Rhizopoda from Hot springs of Azores p. 107. 



Cosmocladium saxonicum. De Bary exhibited. p. 212. 



- Zygospore of Micrasterias papillifcra, for the first time found in Ireland p. 213. 



- Miorasterias furcata. found for the first tiino in Ireland, exhibited along with M. radiosa p. 213. 



Docidium coronatum Ehrh. exhibited p. 21 i. [g]. 



A new species of Staurastrum exhibited p. 422. [g|. 



Double-spored or Three-spored form of Cylindrocystis Brebissonii p. 423. 



- 1875 v. 15: Cosmarium holmiense. ft Lundell, and Cosmarium anceps Lund. new to Ireland p. 409. [g]. 



Cosmarium cyclioum Lundell new to Ireland p. 412. 



Singular and unpreeedented ease of ebnjugation betweon two distinct but allied, Desmidian species p. 111, 415. 



- Dictyosphserium constrictum Aroher, olim found conjugated and a truo, though aberrant, Dosraidian. p. 415. 

 Is7r. v. L6: Bacteria (Baeillus) habitually forming a Nidus in Mucous investments of Algse. p. L05, 106. 



Micrasterias angulosa, Hantsch exhibited for the first time in Ireland p. 109. [g]. 



Cosmarium Beinschii. n. s. exhibited p. 109. 



- Penium curtum Breb. exhibited. p. 235. [g]. 



- A Pseudo-Cosmarium - in nthor words, a Cosmarium-like exeeptional state of an Arthrodesmus-incus form - 

 exhibited. p. 236, 237. 



Notice of some Desmidian forms allied to Closterium obtusum Brdb. p. 238. 



Cosmarium Schliephackeanum, Nordst. new to Ireland p. 338. 



Closterium obtusum. Breb., new to Ireland. exhibited p. 338. 



- A very small form of Cosmarinm Holmiense, Lundell exhibited. p. 334. 



Xow speoies of Closterium, exhibited [Cl. monotsenium] p. 415. 



New Cosmarium sp. exhibited p. 416. 



- Cosmarium pseudomargaritiferum Boiusch. ex herb. Eeinsch exhibited with its zygospore and note thereon. p. 116. 



- Cosmarium annulatum, Nag, and three neighbouring new forms exhibited. p. 117. 

 1><77 v. 17: Cosmarium tetragonum, Nag. Lundell's so called form of. showed p. 102. 



New species of Staurastrum, exhibitcd [S. Royanum] p. 103. 



- Tho unlike Zygospores of two minuto smooth closely rosembling Cosmaria, exhibited, proving thoir speciflo di- 

 stinctness. the puzzling resemblance of the forms themselves nothwithstanding. p. 105. . 



A puzzling Desmidian form p. 10G. 



Occurrence of Spondylosium pulchellum in a stipitate and attached condition, for the first time so observed. p. 191. 



- Exhibition of rare (some very striking I 'esmidian species ]>. 192. 



- Extremely lninute Cosmarium form with zygosporo, held to be a now spooies, exhibited. [C. niinutissimumj p. 194. 



- On a minute species of Cosmariuni with smooth dark brown zygospores p. 301. 



- On a Cosmarium form seemingly the same as Jacobsen^s so called var. of Cosm. Brebissonii p. 305 30(i. 



- A new species of Staurastrum shown p. 164. 



1878 v. 18: Zygospore of Staurastruni turgcscens, d. Not. p. L05. 



- Euastrum divaricatum, Lundell, now to Britain, exhibited p. 108. [g]. 



- Xew Species of Closterium [mediolseve], shown p. 21 1. 



- Docidium nodosum, American example, exhibitod p. 350. [g]. 



1879 v. 19: Now Closterium from New Jersey [crassistriatum] p. L20. 



Elongated anioellular alga, allied to the so callcd Closterium obtusum p. 121. 



Cosmarium n. sp. very minute, with finely spinous Zygospore, exhibited. [lasiosporum] p. 123. 

 Cosmarium fontigenum, Nordst. p. 121. 



- Docidium hirsutum, Bailey. occuring in Scotland, exhibited. p. 438. 



A probably new Cosmarium shown p. III. 



- Xanthidiuni aoanthophorum Nordstedt, exhibited. p. 447. 



1880 v. 20: Micrasterias furcata, exhibited p. 115. [g]. 



- Cosmarium istmochondrum, Nordst. ncw to Ireland, exhibited p. 380. 



