i03 



Btlimcs obsccrus [The Dnskv Twist Siiell]. Muller. 

 Fiffure 75. 



Of the division Bulimus Nottinghamshire appears to 

 boast of but one species, that which is now ubout to be 

 described. It was first described by Boys, in 1784, in 

 " Walker's Minute Shells." 



The spiie consists of six or seven raised whorls 

 which are faintly longiiuflinally striate. Serai trans- 

 parent ; aperture somewhat oval, with a milky white 

 reflected margin. The shell is brown in colour. 



Usual length half an inch. Breadth two lines. 



The colour of the animal is dark grey. 



Found on old walls, under stones, and in woods, un- 

 der moss on trees. 



M. B. Chautereauxiofornis us that Bulimus obscurus 

 deposits eggs from May until September; twelve to 

 fifteen in number at a time, which hatch in fifteen days, 

 and are thirteen mouths in arriving at maturity. The 

 eggs, which are large, are roundish-ovat in form. Thev 

 are opaque, and isolated. 



The youn« of this species are difficult to find, owing 

 to the epidermis resembling the soil or bark on which 

 it may happen to be located, as the case may be. ' 



VVhen crawling the shell is carried at an angle of 50 



In this neighbourhood it is found abundantly at 

 Highfield House and the Nottingham Castle yard. It 

 has not been observed elsewhere. 



Other recorded localities of this common and gene- 



