I903- CoLGAN. — The Leaf-marking of Arum maculaUim. 8i 



the blotchCvS. The cause, in short, is largely ph^^sical rather 

 than physiological, if one may venture to make such a dis- 

 tinction in speaking of a living organism. 



On this hypothesis we should expect to find the pseudo- 

 blisters developed chiefly where maculate Arum leaves are 

 exposed, at least for a short time during their season of 

 maximum development, to direct .sunshine. Such conditions 

 occur in the Kilbogget station as well as in another station 

 in the southern part of the county, near Newcastle, where a 

 similar state of the Arum leaf was observed in 1895. This 

 state is not peculiar to Ireland, for my friend, the Rev. K- S. 

 Marshall, tells me that he observed it in Bagley wood, near 

 Oxford, before 1880, the pseudo-blisters in this case appearing 

 on the under surface of the leaf. 



The whole subject of the blotching of the Arum leaf seems 

 well worthy of study, no less in Great Britain than iti Ireland, 

 and I would suggest to field botanists in both islands the 

 desirability of observing and recording the relative frequency 

 of the maculate and immaculate forms as well as the precise 

 conditions under which each is found to occur. 



Sandycove, Dublin. 



NEWS GLEANINOS. 



Prof. D. J. Cunningham. 



Our regretful but most hearty congratulations to Prof Cunningham, 

 who having been appointed to the Chair of Anatomy in Edinburgh 

 University, will shortly leave the Trinity College Medical School, which 

 his enthusiastic teaching and valuable researches have helped to make 

 famous. We can ill afford to lose one who combines in so remarkable 

 and unusual a degree anatomical with zoological attainments and in- 

 terest. 



A Museum for Limerick. 



We understand that it is proposed to establish a Municipal Museum 

 at Limerick in connection with the Free Library. We congratulate the 

 Corporation of that city on their enterprise, and would respectfully 

 express our opinion that the first requisite for a successful and useful 

 Museum is a competent curator, and that the Limerick Field Club should 

 be able to render valuable service to their city in this connection. 



