1913-1914.J j , 



/acustre, two species which are extremely local in the north-east of 

 Ireland, and are more characteristic of the Central Plain and the 

 eastern counties. Several plants with a similar distribution are 

 found in this corner of Co. Down, among which Trifolium striatum 

 and Orchis pyramidalis may be mentioned ; while of the Crust- 

 aceans, the Pill-Woodlouse, Armadillidium vu/gare, may be taken 

 as an analogous example. During the day two other Woodlice, 

 the beautiful Porce //ion ides (Metoponorthus) pruinosus and Por- 

 cd/io pictus were found in great abundance along the sides of 

 the road near Killough The former species has not often been 

 taken in the open in this country, but generally inhabits hot- 

 houses, where it has been introduced with plants, and it is difficult 

 therefore to say whether or not the species is a native of Ireland. 

 Upon their return from Coney Island the botanists reported 

 finding the rare Clover, Trifoiium striatum in seed, and also the 

 Thistle, Cardans tenuiflorus, the Sea-Beet, Beta maritima, the 

 Mallow, Ma/va roiundifo/ia, Toadflax, Linaria vulgaris, Convol- 

 vu/us arvensis, Agrimonia Eupatoria, and Festuca rigida. 



A visit was paid to the White Bog by the conchologists of the 

 party, and samples of a shell-marl were obtained. This marl rests 

 upon greyish clay, and appears to be of " post raised beach " date. 

 It is, however, covered by a layer of peat, which in turn is, in 

 places, obscured by a thin layer of bluish stony clay containing 

 Marine Shells. This last-mentioned stratum may not, however, be 

 of marine origin, but merely " filling in " deposited by man for 

 agricultural purposes. Twelve species of Fresh-water Shells were 

 obtained from this marl by washing. Of these Limncea pereger 

 and Valvata cristata are still living plentifully in the marsh, while 

 P/anorbis crista and the seven species of Pisidia found may also 

 occur in the living state. But P/anorbis g/aber and Ancy/us 

 fluviati/is are now extinct here, while it is interesting to note that 

 no less than five species — Limncea pa/ustris, P/anorbis carinatus, 

 P./ontanus, Physa fontina/is, and Bithynia tentaculata — which are 

 all abundant in the marsh at the present day, do not appear to 



