Dublin Microscopical Club, 161 



" D. sanaca seems a good s))ecies. I have one female 

 from Fagu, near Simla (about 7000 to 8000 ft.). 



" As regards the males, tliere is every variety from speci- 

 mens with the abdominal area and anal angles entirely black, 

 to others with the white and yellow extending as far as the 

 median and postmedian veins. Mr. MoUer tells me that he 

 has taken both these forms in Sikkim in one sweep of the net ; 

 but, as far as my experience goes, the entirely black form never 

 occurs in the N.W. Himalayas. My own idea is that there 

 are three good species of this group : — D. belladonna^ West 

 China to Kulu ; D. sanaca. Western Himalaya; D. belueha, 

 Beluchistan. 



" As to species of this group being found at Pcnang or Bar- 

 rackpore, I should as soon ex])ect to tind wild zebras in those 

 localities as examples of Delias allied to belladonna.'''' 



The evidence I have brought forward, based as it is on the 

 examination of specimens ten times more numerous than Mr. 

 Butler's and with authentic localities, and the opinions of three 

 naturalists in India who know the species in life, seem to 

 me so strong against every one of Mr. Butler's conclusions, 

 that it is to be hoped he will in future refrain from adding to 

 his very numerous and scattered writings of this character 

 until he has ample material and accurate observations on which 

 to base his opinions. 



PROCEEDINGS OF LEARNED SOCIETIES. 

 DUBLIN MICROSCOPICAL CLUB. 



January 18, 1885. 

 Irish Bog-butter. — Dr. Frazer directed the notice of the Club to 

 the microscopic appearance of a specimen of bog-butter obtained in 

 the form of a large irregular-shaped mass from Mouncha Bog, near 

 Belfast. When examined in a molten condition it showed the cow's 

 hairs so invariably detected in all the examples of Irish bog-butter 

 yet investigated ; and in this case there were also observed well- 

 preserved fragments of Sphagnum moss in all portions of the fatty 

 matter taken from the outer part of the mass. It was clearly en- 

 titled to be considered a true butter, and its sojourn in bog was 

 evidenced by the coating of Sphagnum., now noticed for the first 

 time. 



A seemingly undescribed Phj/cochromaceoiis Alga from Pump- 

 water. — Mr. Archer drew attention to an Algal production taken 

 from the well of a pump, forming to the naked eye an appearance 

 like ground cotiee distributed pretty thickly in the water, the little 

 bodies composing the mass being of a brownish mahogany-like 

 colour. These, viewed under a moderate amplification, jtroved to 



