398 THE MOUNTAIN. 



the naked slugs, both native and introduced, with the excep- 

 tion of Yaginulus, are found. It would seem to be the 

 great central focus of all these genera, from which they 

 radiate into the other sections." 



Some of the Helices are universally diffused, as labyrin- 

 thica, from Florida to Maine, also Helix minuscula, and 

 Pupa contracta, rupicola, and exigua. 



In the distribution of the genera and species of this geo- 

 graphic section, page 129, Dr. Binney gives the following 

 synopsis, the foreign species being printed in italics : 



" Tebennophorus carolinensis. 



" Arion hortensis. 



" Limax agrestis, campestris, variegatus. 



" Succinea avara, aurea, obliqua, ovalis, putris. 



" Bulimus lubricus, fallax, exiguus. 



" Helix albolabris, alternata, appressa, arborea, cellaria, 

 chersina, clausa, concava, demissa, dentifera, electrina, ele- 

 vata, exoleta, fallax, fuliginosa, hirsuta, hortensis, indentata, 

 inflecta, inornata, interna, intertexta, labyrinthica, ligera, 

 lirnatula, lineata, lucida, minuscula, monodon, multidentata, 

 multilineata, palliata, pennsylvanica, perspectiva, profunda, 

 pulchella, sayi, solitaria, striatella, suppressa, thyroidus, 

 tridentata. 



" Pupa armifera, badia, corticaria, contracta, rupicola. 



"Vertigo decora, gouldii, milium, ovata, pentodon." 



Most of these animals are inhabitants of forests ; some of 

 gardens and houses, even towns and cities. 



Family I. LIMACID^E. Slugs. These are the slugs, or 

 snails without shells, as they are commonly called. They 

 do not go very far north or south, but abound in the tem- 

 perate latitudes. Their slimy trails are found over logs, 

 stones, walls, fences, etc. Many of them are injurious and 

 destructive in gardens, having nocturnal habits, and being 

 extremely difficult of detection in their devastations. They 

 endure much cold, but do not hybernate like the snails. 

 Wonderful stories are told of slugs and snails, of their varied 

 qualities and strange powers of instinct. They have been 



