114 



NATURAL HISTORY SOCIETY OF DUBLIN. 



The Epidemic Cholera in Kingstown. — Notwithstanding its con- 

 stant intercourse with Dublin, the epidemic cholera, which commenced 

 in Dublin on the 27th July, did not reach Kingstown till the 18th of 

 September, when the first case occurred in Upper George' s-street; but 

 from that time it raged with greater severity, in proportion to the po- 

 pulation there, than it did in Dublin. During nine weeks from its 

 appearance in Kingstown, 124 deaths were reported from that cause. 



The following Table, showing the number of deaths from cholera 

 and diarrhoea in Kingstown each week, from the commencement to the 

 cessation of the epidemic there, is founded on the weekly reports of the 

 Registrar- General : — 



Deaths. 



Cholera, . 

 Diarrhoea, 

 Total from all 



WEEK ENDING 



r 



September 

 15th, 22nd, 29th. 



5th, 



October 

 13th, 20th, 



27th. 



- — \ 

 November 

 3rd, 10th, 17th 



10 1 7 



19 



15 27 



24 



13 



10 8 



2 1 1 







3 







3 



3 



7 7 15 



30 



23 42 



33 



24 



21 12 



These observations, being compiled from a totally independent 

 source, I think them worthy to bring under the notice of the Society. 



The following paper was read : — 



Remarks on the Genera Zygogonium (de Bary) and Zygogonium 

 (Kutz.), with Description of the Conjugated State oe the Plant 

 believed to be identical with Zygogonium l^ive (Kutz.), but which 

 is referrible rather to the Genus Mougeotia (de Bary, non 

 Agardh). By William Archer. 



A minute, simple, filamentous, green Alga — that is, a series of short cy- 

 lindrical cells, of different lengths, combined in an unbranched linear 

 series — might at first sight be regarded perhaps as hardly worthy of pro- 

 longed examination — an organism which boasts no gay coloration, no 

 striking form, which probably occurs mingled with a multitude of others 

 perhaps equally unattractive to a casual observer, might indeed seem to 

 possess no very great points of interest to arrest attention, or to claim 

 our study ; nay, so lowly a plant as that which we^have now to do with 

 might seem as hardly even sui generis, as hardly possessing a proper in- 

 dividuality amongst the other, probably numerous, simple forms by 

 which it may be surrounded. But the little filament, the occurrence of 

 which in the conjugated state suggests the materials for the following 

 remarks, simple as it is, I should hold can be readily recognised 

 when recent, even in the barren state ; and the characters then pre- 

 sented, combined with those of the conjugated condition, are sufficiently 



