282 



XLIV.-ADDITIONS TO THE WILD FAUNA AND 

 FLORA OF THE ROYAL BOTANIC GARDENS, 



KEW : V. 



MOLLUSCA. 

 Alfred Sigh. 



Daring the last few years a renewed interest has been taken in 

 the study of our native Mollusca, especially of those families 

 which include the slugs. Though several species of slugs and 

 snails only too commonly make their presence known, there are 

 many others which will probably escape observation in any 

 particular area, unless special search is made for them. Doubtless 

 there are several species inhabiting the Royal Gardens at Kew 

 which have not yet been recorded. 



GASTEROPODA. 



LlMACIDAE. 



Limax flavus, Linn. In the vicinity of the dwelling-houses. 



When adult this slug may be known by its large size, yellow 

 colour and beautiful bluish tentacles. It commonly occurs aronnd 

 the walls of houses, hiding in damp corners and even finding its 

 way into cellars. It is active at night, but the slimy tracks it 

 leaves on the walls may frequently be observed in the day time. 



Agriolimax laevis, Mull. Close to the water along the Strip. 



This is a small red-brown slug. When in motion the mantle 

 appears situated almost in the centre of the animal on account of 

 its remarkably long neck. In most of the other slugs the mantle 

 lies much nearer the head. This species inhabits very damp 

 places and may be found on plants growing at the water's edge. 



ZONITIDAE. 



Vitrea crystallina, Miill. Common along the Strip. 



This small snail with its exquisite pearly white shell in which 

 tne umbilicus is minute, occurs, usually two or three together, 

 tinder stones, bits of wood, &c, in damp places. 



Zonitoides nitidus, Mull. Not rare along the Strip. 



A rather small, almost black snail with a glossy red-brown shell 

 navmg a deep suture. This species and the above-mentioned slug, 

 a laevis, so frequently occur in the same spot that if one of them 

 ue observed, the discovery of the other may confidently be 



anticipated. 



Arionidae. 



Oct^J^T*^ 8 ' Joh naton (= fasciatus, var. y, Nilsson). 

 uccurs along the Strip and also in P. 



berncnn^I^* S ^ Ci ? ? f 8lug ' about an inch lon g> has sometimes 

 Sv hi T?- Wlt ^ 6' hortensis > Fer., but in its typical form may 

 wh « A h dl f n Smshed by the under surface being clear white, 

 wtnle A. hortensis is yellowish orange beneath. 





