30 



Revie7vs and Book Notices. 



Similar results we may expect from further investig-ation else- 

 where. The monograph is valuable also as giving- a summary 

 of results under the heading- of nearly each species. The plates 

 showing- the distribution of several of the species are specially 

 interesting. The sketch showing the spread of the distribution 

 of Paludestriiia je?ikinsii d\xi'\ng several years is excellent. The 









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AliJ'a.r-.d.TtL 

 Dock. 

















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H UMBER 









2, 















Distribution of Paludestrina jenkinsii. 



deductions in one or two instances are open to question, but 

 they form a valuable basis for the treatment of the individual 

 species in relation to effect of food, soil, climatic conditions, 

 and extension of area of distribution. Reference is made 

 to the maps of the Flora and Geology of the East Riding in 

 Vol. 2 of the Transactions. It would have added to the value of 

 the monograph if that could have been included, as the question 

 of soil is an important factor in the distribution. The maps 

 appear to be generally accurate, but Plate XII,, Helix arbitstor iun , 

 shows on the Holderness side, near Driffield, an area of dis- 

 tribution which should have been well to the left of the line of 

 demarcation of the Wolds area, as Sledmere is well over the 

 line. The Driffield records should be for the Wold part of the 

 Driffield district nearer Sledmere. The streams should have 

 been carried over the line, as they go beyond Driffield, which is 

 on the line. We congratulate Mr. Fetch on his able monograph 

 and would heartily recommend it to all who would know about 

 the East Riding Fauna. It is considered the prerogative of 

 a reviewer to indulge in a grumble. We confess that we are 

 surprised to find that the older nomenclature has been adhered 

 to in preference to that of the new List of British Non-Marine 

 MoUusca prepared by the Conchological Society and finalh' 

 issued in 1904. We know that doctors diff"er, and scientists 

 more so, and certainly one gets very tired of the constant 

 change in name ; but the new list is after all the latest authorised 



Naturalist, 



