8 



39. Helix alliaria. Garlic Snail-shell. 



40. Helix lucida. Lucid Snail-shell. 



41. Helix hispida. Bristly Snail-shell. 



42. Helix crystallina. Crystalline Snail-shell. 



43. Helix pura. Clear Snail-shell. 



44. Helix radiata. Radiated Snail-shell. 



45. Helix rupestris. Open Snail-shell. 



46. Helix pygmeea. Pigmy Snail-shell. 



47. Helix fulva. Top-shaped Snail-shell. 



48. Helix Scarburgensis. Scarborough Snail-shell. 



49. Helix pulchella. JVJnte Snail-shell. 



50. Helix brevipes. Short-foot Snail-shell. 



IX. CAROCOLLA. ROCK-SHELL. 



So called from the tenacity with which it adheres to 

 the interstices of limestone rocks, the surface of 

 which it is supposed to corrode, and was therefore 

 denominated Lapicida by Linne. 



5 1 . Carocolla Lapicida. Variegated Rock-shell. 



X. AZECA. TRIDENT-SHELL. 

 A name arbitrarily adopted by Dr. Leach. 

 52. Azeca Matoni. Glossy Trident-shell. 



