Qiiarterly Journal of Coiichology. 283 



and curved ; columella truncate, v.'ith a thin and somewhat 

 indistinct layer of callus ; umbilicus obsolete. 



Length 0.375, breadth 0.076. 



Hab. Zanzibar. 



Rather numerous at Zanzibar, but in one place only, viz., 

 under a bush in or on the light mould. 



The animal crawls very slowly and by jerks, dragging the 

 shell after it; the position of the shell would appear to be a 

 matter of little moment to the animal \ sometimes Jt is pulled along 

 sideways, and on one occasion Mr. Gibbons observed a specimen 

 actually pushing its shell before it. The tail is usually slightly 

 curved upwards. 



-gg nttQQoa»m" 



REMARKS ON THE GEOGRAPHICAL DISTRIBUTION 

 OF THE TERRESTRIAL MOLLUSCA. 



By C. P. Gloyne. 



I. Introductory. — We have been induced to put together 

 the following remarks on the geographical distriblition of the 

 terrestrial moUusca by the consideration that no general survey of 

 the subject has been published in England of a later date than 

 that in Woodward's "Manual of Recent and Fossil Shells," of- 

 which the first edition v.-as published nearly a quarter of a century 

 ago, and the second in 1866. The account of the subject in the 

 first edition vras very good for the time, that in the second was 

 partially, but only partially, revised, and the third edition was a 

 mere reprint of the second. 



Of late years the discoveries of new species in regions little 

 known in Woodv.'ard's time have been very numerous, and, besides 

 this, the general classification of the terrestrial mollusca has been 

 completely altered, so that, for example, the West Indies, to which 



