148 Beautiful Shells. 



first found it in Scotland amidst the ruins oi 

 Dunottar Castle ; and it must have an affinity foi 

 old castles, as Mr. B. J. Lowe mentions as a Mid- 

 land habitat Nottingham Castle yard. Three 

 examples next turn up of the chrysalis snail shell, 

 or pupa. Their fancied resemblance to chrysalidfc 

 give the pupso their name. They are similar in theii 

 habits to the Bulimi, feeding on vegetable sub- 

 stances ; residing under mosses, herbage, or stones ; 

 inert in continued drought, and searching mostly foi 

 food at night, when the grass is moist. Unlike the 

 Bulirnus, however, the Pupa umbilicata, for instance, 

 is a slow mover, and carries its shell at the mode- 

 rate inclination of 15°; and the shell, instead oi 

 tapering like the Bulirnus, comes abruptly to an 



52. 53. 



51. Bulirnus obscurus (the Dusky Twist Shell), Muller, 

 52. Pupa umbilicata (the Umbilicated Chrysalis Shell), 

 Draparnaud. 53. Pupa pygmoea (the Pigmy Chrysalis 

 Shell). 54. P. L substriata (the Six-toothed Chrysalis 

 Shell), Jeffreys. 



apex. It is very minute, usually only the ninth of 

 an inch long and the twentieth of an inch broad. 



