SCOTTISH DRAGONFLIES 25 



It will be seen that I recognise the claims of nineteen 

 species to be included in the Scottish fauna. The least 

 satisfactory is ALscJma grandis. The announcement in Mr. 

 Lucas's recent paper that it had been taken at Ellangowan, 

 Dumfries, by Mr. B. M'Gowan was, unfortunately, an error, 

 owing, it appears, to Mr. M'Gowan having inadvertently 

 written grandis for juncea in a letter to Mr. Lucas. Mr. 

 M'Gowan assures me he has never seen grandis in Scotland. 



There is no need to go over the Table in detail ; it speaks 

 for itself, and shows at a glance how many counties each 

 species has been recorded from, and how many species have 

 been recorded from each county. In the former enumeration, 

 sEsckna juncea heads the list, appearing in 35 of the 41 

 counties, the next in order being Enallagina cyatliigerum, 

 Pyrrhosoma nymphula, and Sympetrnm scoticum, with 32, 31, 

 and 30 respectively to their credit. The most productive 

 counties, taken as a whole, are Inverness with 15 of the 19 

 species, and Perth with 13 or 14, both yielding the two 

 boreal species, SomatocJdora arctica and sEschna carulea. 

 Six species are recorded from the Outer Hebrides, four from 

 Orkney, but only one so far the common E. cyathigeruin 

 from Shetland. The poorest section of the mainland of 

 Scotland, as regards Odonata, is that which lies to the south- 

 east of the " Highland line " ; in the south-west corner, 

 adjoining the Solway, there is an improvement. Dragonflies 

 are naturally more at home in a natural country well supplied 

 with suitable aquatic habitats, such as one finds in the High- 

 lands and along the West Coast. 



In conclusion, I would point to the blanks in the Table, 

 and solicit the help of readers of the " Annals " in an 

 endeavour to fill them up, as far as possible, in the coming 

 summer. 



NOTE ON VARIATION IN THE JELLY-FISH 



A U RE LI A AURITA. 



By D. C. M'INTOSH, M.A., B.Sc., F.R.S.E. 



WHILE variation has for some time been recognised as a fact 

 of fundamental importance in evolution, it is only within 



