16 BRITISH MOLLUSKS. 



recent work on the terrestrial mollusks of that country, reduces the 

 number to eight, and two even of these are at least doubtful, L. Cor- 

 sicus, which is said to differ from L. cinereus in a character by no 

 means constant, and L. Alpinus, which M. Moquin-Tandon says he 

 never saw but once, and which De Blainville pronounced to be also 

 L. cinereus. 



Not many extra-European habitats have been recorded. L. gagates 

 and jiavus have been collected in Madeira, and L. agrestis, flavus, 

 and cinereus in Syria. L. agrestis and Jiavus have been trans- 

 ported to Boston, New York, Philadelphia, and other maritime 

 cities of the United States, and are breeding abundantly to a dis- 

 tance of nearly a hundred miles inland. The North Americans 

 have two species of their own ; and two species have been described 

 by D'Orbigny from South America. Two species have also been 

 described by the same author, from the Canary Islands. Not many 

 intertropical Limaces have been described, though doubtless many 

 exist. Mr. Cuming informs me that he saw many at the Philippine 

 Islands, but did not preserve specimens. MM. Quoy and G-aimard 

 describe a species from New Zealand, one from Mauritius, and one 

 from Ascension Island ; and two are described by Dr. Krauss from 

 South Africa. 



To the remarks already made on the habits of the Limacinea gene- 

 rally, it may be added that L. agrestis has a partiality for the flower 

 and kitchen gardens, L. .marginatus for trees, and L. flavus for 

 cellars, caves, and walls. All more or less spin mucous threads, and 

 will let themselves down from shrubs or other objects not agreeable 

 to them for food or habitation. 



The species of Limax are : — 



1. Sowerbyi. Animal tawny yellow, tessellated with dusky- 



brown, back keeled throughout, shield granulated. Shell, an 

 unsymmetrical concretion. 



2. gagates. Animal dull grey, back keeled throughout, radiately 



furrowed and veined, shield granulated. Shell, an unsym- 

 metrical concretion. 



3. agrestis. Animal yellowish-grey, red-mottled, back keeled 



towards the tail, shield concentrically striated. Shell flat. 



4. marginatus. Animal gelatinous, livid grey, black loop-banded, 



back keeled towards the tail, shield concentrically striated. 

 Shell oval, concave. 



