26 Quarterlii Journal of Coiichology. 



latter pointed out by Ferussac. It is too difficult a genus, however, to 

 give a decided opinion upon. 



Arion hortensis Ferussac. — In gardens, &c., common. A variety, 

 or possibly a species, nearly allied to this is found in woods. It is 

 about twice the size of the garden slug, and its colour invariably 

 yellowish fawn, inclined to amber, with a brown band on each side. 

 The two kinds are not found mixed, the one inhabiting the woods and 

 the other cultivated grounds. 



Limax marginatus Midler. — Occasionally at Benwell, near New- 

 castle. 



Limax flavus Linne. — In cellars, &c. ; not very common. 



Lim.ax agrestis Linne. — In fields and gardens ; very common 

 throughout the district. 



Limax brunneiis Drapamaud. — In damp woods, frequent. 



Limax tenellus Midler. — Occasionally occurs in a wood at Allans- 

 lord, county of Durham. The specimen referred to was of a pale, dull 

 yellow colour, very transparent and lubricous, with an obscure band on 

 each side of the shield and back; the posterior part of the shield 

 rounded; the tentacles black, length rather more than an inch; the 

 mucus orange-coloured. In all these particulars it agrees with the 

 description of Limax tenellus given by Nilsson in his excellent little 

 work, called " Historia Molluscorum Suecite." Nilsson's description 

 is as follows : — " Animal parvum, vix. 1^ unc. longum. Clypeus 

 lineis subtilibus concentrisis striatus, apertura lateribxis postica. Collum 

 supra linea longitudinali elevata, lateribus subreticulatis. Dorsum 

 postice compressum. Color clypei et dorsi postici luteus : dorso supra 

 luteovirescente levissime cinerascente, subtus albo. Tentacula, caput, 

 et linea colli utrinque, humida, rarius." 



Limax arbomm Boucliard-Chantereaux. — Occurs occasionally, and 

 is to be met with in woods at Wolsingham and 8hotley Bridge, in the 

 county of Durham. 



Limax maximiis Linne. — In woods and fields ; common through- 

 out the district. 



Succinea putris Linne. — Common on aquatic plants in marshy 

 places, and at the borders of rivulets. 



Succinea elegans Risso. — Of frequent occurrence; rather local. 

 To be met with in the neighbourhood of Wark, North Tyne. 



Vitrina pellucida Midler. — Common amongst decayed leaves and 

 under stones in woods ; more plentiful on the sea banks. Very 

 abundant near St. Mary's Island, near Hartley, where, in some states 

 of the weather, it is difficult to walk without crushing numbers of 

 them. 



Zonites cellarius Midler. — Common throiighout the district ; found 

 generally in yards and cellars and under stones. 



Zonites alliarius Miller. — Common throughout the district, in 

 woods or amongst moss. 



Zonites nitidulus Drapamaud. — Common through the district. 



Zonites purus Alder. — Occurs occasionally in woods in the dis- 

 trict, at Eothbury and Gibside Woods. 



