248 THE DISPERSAL OF SHELLS. 



suggested that the creature might be an escape, intro- 

 duced with foreign plants; Captain Brown (1844), 

 Forbes and Hanley (1853), and Reeve (1863), also 

 regarded it as imported or questionably indigenous. 

 The Rev. W. H. Hawker (1853), however^ when record- 

 ing the finding of many specimens in the beech-hangers 

 covering Stoner Hill, Ashford, Hampshire, expressed 

 a belief that the species was a native. It was im- 

 possible, he thought, that the animal could have spread 

 or wandered over the low and flat country between the 

 Ditcham and Ashford Woods, the two habitats being 

 about six miles apart.' It may be remarked, of course, 

 that there are various means by which the creature 

 might have been transported from one place to the 

 other ; but it has since been found at points many 

 miles distant from the original habitat^ and Jeffreys has 

 referred to it in the "British Conchology " (1862)- as 

 clearly indigenous. It sometimes occurs in this country 

 in fair plenty, but its known range, it must be admitted, 

 is still very limited, being confined, I believe, to a 



' W. H. Hawker, "Zoologist," xi, (1853), pp. 3764-5; and see 

 also on the British habitats of H. obvohita : J. E. Harting, 

 " Zoologist," (2), ii. (1867), p. 760; W. Thomson, " Zoologist," (2), 

 ii. (1867), p. 837 ; C. Griffith, "Science Gossip," for 1873, P- 276; 

 T. Godlee, "Quart. Journ. Conch.," i. (1874-8), p. 68; J. E. 

 Harting, "Zoologist," (3), ii. (1878), p. 94; W. Jeffery, "Journ. of 

 Conch.," ii. (1882), pp. 316, 339; B. Tomlin, " Science Gossip," 

 xix. (1883), pp. 67-8; C. Ashford, " Science Gossip," xix. (1883), 

 p. 89; T. D. A. Cockerell, "Zoologist," (3), ix. (1885), p. 380; 

 S. J. Da Costa, on its occurrence (dead) in the woods of Norbury 

 Park, Surrey, "Journ. of Conch.," v. (1886), p. 81. 



~ pp. 48-9. 



