of the Fishery Board for Scotland. 339 



Erpetocypris tumefacta (Brady and Robertson). A few in the burn 



and in the ponds. 

 Cypridopsis vidua (0. F. Miiller). A few in one of the ponds. 

 „ villosa (Jurine). A few in the burn and in one of the 



ponds. 

 Candona Candida (Miiller). Frequent in the burn and ponds. 

 ,, lactea, Baird. In one of the ponds, rather rare. 

 „ acuminata (Fischer). In the burn and one of the ponds, 



rather rare. 

 „ Mngsleii, Brady and Robertson. In marshy ground by 

 the side of the burn, not common. 

 Aquatic Acari and Coleoptera, the larvae of Coleoptera and Phryganeidse, 

 were also observed both in the burn and in the ponds. 



5. The Coulter Burn from Howietoun to Goldenhoof. 



This section includes the Howietoun Ponds to Goldenhoof Dam as well 

 as the dam itself. Between the ponds and Goldenhoof the burn is 

 locally known by the name of the Stockbridge Burn. Very few organisms 

 were observed in this part of the burn. It flows too rapidly to permit of 

 anything, except perhaps insect larvae or Ancylus, getting a foothold. 

 There were, however, a few marshy places by the side of the burn that 

 yielded a number of Ostracoda, among which was Cypris reticulata — a 

 species which, though generally distributed, is not very common. 



The dam is of comparatively small area ; part of its margin is densely 

 fringed with reeds and other aquatic plants, which afford shelter to 

 numerous organisms. Among these Mollusca and various groups of 

 Entomostraca were common, as well as Diatoms, Confervae, and the larvae 

 of insects. The water is not very deep, the deepest part being scarcely 

 over 6 feet ; the bottom is formed of fine mud, evidently consisting very 

 much of vegetable debris, for when it was disturbed bubbles of rnarsb- 

 gas rose to the surface of the water. Trout were moderately common in 

 the dam, and it was ascertained, by the examination of the stomachs of 

 some of them, that they were feeding on insects and Entomostraca, 

 especially Ostracoda. The following are the species of Mollusca and 

 Crustacea observed and identified in this section : — 



MOLLUSCA. 



Pisidium pusillum (Gmelin). Frequent in the dam. 

 Planorbis spirorbis, Miiller. Frequent in the dam. 

 Limncea peregra (Miiller). Frequent in the dam and burn. 



CRUSTACEA. 



Daphniad^e. 



Eurycercus lamellatus (Miiller). Not common in the dam. 

 Chydorus sphsericus (Miiller). Not common in the dam. 

 Acroperus harpm, Baird. In the dam not common. 



Copepoda. 



Cyclops serrulatus, Fischer. Frequent in the dam. 

 Canthocamptus minutus (Miiller). Frequent in the dam. 



