1901-1902.] 7 



H. L. Orr and R. Welch examined for mollusca on May 

 4?h that portion of the Lough shore between Moore's 

 Quay and Antrim Park. This narrow, marshy strip, subject 

 to winter floods, has many shallow pools and drains that 

 seem to be the nurseries for several species that are found in 

 abundance a few months later in shallow water on the margins 

 of the Lough, but rare or entirely absent in the deeper 

 water. These are Limncea stagnalis and L. iKilustris, Physa 

 fontinalis and Planorhis marginatus. Some of the latter 

 approach very closely P. carinatus. Two species were noted 

 which seem new to the Lough fauna, Aylexa hypnorum and 

 Planorhis spirorbis. The former has been recorded for very 

 few localities in the North, but is exceedingly plentiful in 

 these pools, though not found in the Lough itself. Both 

 these species seem to prefer pools that dry up in summer. 

 Twelve freshwater species in all were noted. Mr. W. A. Green 

 found a large colony of Hydrohia jenkinsi at Bannfoot, 

 where the river enters the Lough. It will be interesting to 

 note if this colony spreads; it is local at present. This is the 

 first find of a large number of this species in an inland 

 station in Ireland. Except two living specimens at River- 

 mouth, Antrim, all previous recoj^ds were from the coast. 



H. L. Ore. 



Robert Patterson. 



R. Welch. 



