I92I. 



GvRNUY — Irish Entomostraca. 



19 



2. HOWTH. 



High up on the hill of Howth is a marshy spot with 

 a small deep pool, or reservoir, in which Cyclops prasimis 

 and Bosmina longirostris abounded, while Canthocamptus 

 pygmaeiis, Alonella nana and Alona affmis were found in 

 adjacent pools. This depression seemed, from the nature 

 of the flora and fauna, to drain more or less calcareous 

 soil, whereas a pool in a qua.rry higher up the hill appeared 

 to be of a different character. Here occurred Cyclops 

 languidus, C. biseiosiis and Moravia hrevipes, the last 

 being, I think, an addition to the Irish fauna. M. hrevipes 

 is a rare British species living only in lime-free water and 

 generally in Sphagnum moss. It has been recorded from 

 several localities in Scotland, from Epping Forest, and 

 occurs in heath pools in Norfolk. 



3. Bog of Allen at Newbridge. 



I was only able to visit the fringe of the bog and to 

 make a few collections in small Sphagnum pools here and 

 there, so that the results were disappointing and scanty. 

 These small pools, sometimes quite filled with Sphagnum, 

 seem to have much in common with the Sphagnum bogs 

 of the New Forest. The fauna is remarkably poor, the 

 only species found to be common at Newbridge being 

 Acantholeberis curvirostris. A few specimens of Moravia 

 hrevipes were taken from one pool, but the most interesting 

 capture was Cyclops venustus Norman and Scott, a species 

 which was described in 1906 from specimens collected on 

 Exmoor by Canon Norman. It has since been found by 

 Mr. Scourfield on Exmoor and Dartmoor also. This 

 species is closely allied to C. capillatus, and is, perhaps, to 

 be regarded as a variety of it, but it is readily distinguished 

 from that and other species by the coarsely toothed margins 

 of the abdominal segments and by the surface markings of 

 the integument. The surface of the abdominal segments 

 is ridged, and along these ridges run rows of minute markings 

 which are apparently pits such as are found in C. diaphanus 

 Fisch. The surface of the cephalothorax is covered by 

 delicate marking which gives the appearance of a complicated 



