of the Fishery Board for Scotland. 337 



MOLLUSCA. 



Pisidium pusillum (Jurine). Frequent. 

 Limn&a truncatula (Muller). Frequent. 



CRUSTACEA. 



OSTRACODA. 



Cypria ophthalmica (Jurine). Frequent. 



Cyclocypris globosa (G. O. Sars). Rare. 



Erpetocypris tumefacta (Brady and Robertson). Frequent. 



Cypridopsis villosa (Jurine). Not common. 



Candona Candida (O. F. Miiller). Frequent. 



„ rostrata, Brady and Norman. Not very common. 



,, kingsleii, Brady and Robertson. Not very common. 



3. The Coulter Burn from Craigquarter Wood to the Hatching 



House. 



Part of the course of the burn in this section is alongside the Kilsyth 

 Road, so that its banks presented conditions even less favourable to the 

 existence of aquatic organisms than in the previous section. The burn 

 itself was also unproductive of anything noteworthy. The species observed 

 and identified in this section were — 



MOLLUSCA. 



Pisidium pusillum (Gmelin). Few. 

 Limneea peregra (Miiller). Few. 



CRUSTACEA. 



OSTRACODA. 



Cypria ophthalmica (Jurine). Few. 



„ serena (Koch). Not very common. 

 Cyclocypris globosa (Gr. O. Sars). Few. 

 Erpetocypris strigata (0. F. Miiller). Not common. 



„ tumefacta (Brady and Robertson). Not common. 



Cypridopsis villosa (Jurine). Not common. 

 Candona Candida (Miiller). Frequent. 



,, kingsleii, Brady and Robertson. Few. 



4. The Coulter Burn from the Hatching House to the 

 Ponds at Howietoun. 



This section included the examination of the burn from the Hatching 

 House to the ponds at Howietoun and a few of the ponds. In describing 

 our examination of Loch Coulter, reference was made to the immense 

 number of Entomostraca in the water there, and the question of what be- 

 came of these organisms suggested itself as one of the first points requiring 

 consideration. An explanation, that seemed a fairly reasonable one, was 

 that a great many of them would be carried down the b'irn with the 

 overflow water, especially when during wet weather a larger quantity of 

 water than usual passed down the burn. At the time we visited the 



V 



