42 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



plants — there was a steady development as the days lengthened, 

 and on the whole the growth made by trees was satisfactory, and 

 the foliage generally was better developed than in most years. 

 Deciduous trees and shrubs bloomed well as a whole, but the 

 display was of short duration, on account of the dryness of the 

 atmosphere and prevalence of keen winds during the period of 

 bloom. This drying effect, which intensified the natural exhaustion 

 consequent on the heavy flowering of plants, caused the trees 

 to "set" badly, therefore the crops of fruit were below the 



average. 



Grass lands were slow to start, but made good headway after 

 the beginning of June, and hay crops generally were good. Cereals 

 were also a full crop, and were harvested on the whole in excellent 

 condition. Root crops, especially potatoes, were above the 

 average. The growth made by trees and shrubs, as already 

 stated, was good, and, getting rain in time in autumn, most species 

 set floAver buds very freely, and the promise of an excellent 

 display of bloom for 1906 is extremely satisfactory. 



On the occurrence of Idoihea neg/ecta, G. 0. Sars, and 

 Idothea viridis (Slabber), within the Clyde Sea 

 Area, and some Notes on other Clyde species of 

 Idothea. 



By Alexander Patience. 



[Head 26th September, 1905.] 



The family Idotheidae, to which the above-named species belong, 

 forms part of the Valvifera, a tribe of the great order Isopoda. 

 This important group is distinguished from all other known 

 Isopoda by the peculiar structure of the uropods, which have 

 become modified so as to act like a pair of folding doors over the 

 under surface of the metasome, thus protecting the delicate 

 pleopoda, or swimming feet. 



