118 



CATALOGUE OF 



Dimensions. Westerlund's measurements are: Long. 3-5, 

 Alt. 3'5, Crass. 3'5 mm., but a larger specimen in the National 

 Museum, Ireland, is Long. 4*5, Alt. 4 mm. The West Galway 

 specimens were smaller and less globose : 2-8 x 2*5 x 1'8 mm. 



The outstanding feature of the species, apart from its globular 

 form, is (he peculiar curve and twist of the anterior principal 

 lateral teeth, with the deep fossae behind them. No similar 

 characters occur in any of the members of the genus treated of in 

 this Catalogue. 



Judging from the specimens received from other places, there 

 can be no doubt but. that those from the type locality represent an 

 abnormally swollen form. 



D I S T R I B U T T C) X. 



81 

 01 



NS CA 

 HB 88 



RW RE EL BF AN 



8 Wl Ei PN AS 



AM PM FF Kl 



M DN SG PC KF 



' CT ' RF LL ED HD 



AY LA PE BW NN 



WD ED LD AN WT KB DF SK RX 8N 



FE TY AR DO CU WL NY DM 



WM 8L LE MO ML MY EY 



EM RO CV LH 8L WY 8Y LN 



WG N6 LF WH ME CR DB FT CH DY NM LS 



SG KG KD DU MN MG SP 8T LR CB WN EN 



CL NT QC CW Wl CD RA HF WO WW NO HU WS ES 



NK LK 8T KK WX PB CM BR GE OX BX BD HT NE 



SK MC EC WA GM MM GW NW BK MX.^SE 



WC NS SW HN SR* WK EK 



ND 88 DT 8H WX EX 



EC 8D IW 

 SC WC 



Cl 

 Pisidhnn hibernicum. 



(Recent occurrences are shown in red: fossil occurrences hyaline 

 below the symbols. For the explanation of the symbols see p. 20.) 



