HELICIDiE. 15-3 



brought me specimens, some of them containing the 

 living animal. 



37. IS. Helix sericea. Silky Snail, (t. .f. 134.) Shell 

 rather globular, thin, transparent, reddish horn- 

 coloured, nearly smooth, or slightly wrinkled, 

 with six whorls thickly set with soft recurved 

 hairs ; outer lip thin, without any ribs ; umbili- 

 cus small. 

 Helix sericea. Mutter, — Drap. t. 7. f. 16, 17.; 

 Kenyon, Mag. N. H. t. 427. f. 3.; Alder, Mag. 

 Zool. 8f Bot. ii. 107. ; not Turton, Man. ed. 1. 

 Helix hispida. Gilbertson, MSS. B. M. 

 Inhab. woods (?) North of England. 

 Animal greyish, marbled with black. 

 Shell subglobular, three tenths of an inch in dia- 

 meter, dark brown, thin, pellucid, with a very obscure 

 whitish central band, giving it a rather keeled appear- 

 ance, covered with a brown periostraca with distant 

 elongated hairs; umbilicus rather small (partly 

 covered with the front of the lip), only showing the 

 last whorl but one. 



Mr. Alder, who first noticed this species in England, 

 observes, " It is difficult to say whether or not this is 

 the H. sericea of Mtiller, I having introduced it as 

 such on the faith of Baron de Ferussac. I leave it for 

 further investigation." 



This shell varies from dull reddish to nearly 

 pure translucid white. 



Mr. Kenyon gave the accompanying figure MQk 



as H. sericea of Draparnaud. ^^ 



The shell is thinner, more globular, and with the 



umbilicus smaller than H. hispida ; of a darker colour, 



and with the apex more depressed than H. gramdata. 



H 5 



