228 THE DISPERSAL OF SHELLS. 



Helix villosa having died out need not be dealt with 

 at present, but it will be well to recall the facts con- 

 nected with the others, T. niaugei and B. goodallii ; 

 and I have also added a note on Helix terrestris 

 and Pupa cinerea, names which have appeared (in 

 brackets) in the Conchological Society's new list of 

 1892. 



Testacella maugei Fer. — a "snail-slug" — which 

 seems to be a native of the south-west of Europe, and 

 occurs also in Madeira, the Canary Isles, etc., was first 

 noticed in England between the years 18 12 and 1816, 

 in Messrs. Miller and Sweet's nursery (now Garraway's), 

 near Bristol, by Mr. T, Drummond ; and Mr. J. S. 

 Miller, in a paper published in 1822, expressed the 

 opinion that it had been introduced with foreign plants ; 

 but he added that it propagated freely in the open 

 ground, increasing much in rich soil, and could "no 

 longer be considered as an alien." Mr. J. De C. 

 Sowerby, as appears by a note in Loudoiis j\Iagazine in 

 1833, also regarded the animal as introduced, the 

 original specimens having been imported, he thought, 

 probably by accident, along with plants from Teneriffe 

 or elsewhere ; Mr. Alder, in 1838, while regarding T. 

 halioiidea as a native, also thought the case different 

 with the present species " which belongs to a warm 

 climate, and has evidently been introduced along with 

 exotic plants;" Gray (1840 and 1857), Forbes and 

 Hanley (1853), Jeffreys (1862), Reeve (1863), Tate 

 (1866), and other authors agree in this view, and I am 

 not aware that any writer has maintained that the 



