444 



EXPLANATION OF PLATES OF VOL. IIL 



LXVII. 

 LXVII. a. 



Fig. 2. 



Fig. 3. 



Fig. 4. 

 LXVIL b. Fig. 1. 



Fig. 2. 



Fig. 3. 

 LXVII. c. Fig. 1. 



Fig. 2. 



Fig. 3. 



Fisr. 4. 



Fig. 2. Limax agrestis. 

 Fig. 3. campestris. 



LXV. Fig. 1. flavus — with eggs. 



Fig. 2. Arion fuscus. 

 LXVI. Fig. 1. Ariolimax Columbianus, with the internal plate, head, and 

 mantle. 

 Fig. 2. Arion foliolatus with the surface enlarged. Not an Arion. See 

 p. 225. 

 Veronicella Floridana. 

 Fig. 1. Vitrina limpida. 



Suceinea Concordialis. 



ovalis, Gld., not of Say. 

 Nuttalliana. 

 Suceinea campestris. 

 Totteniana. 

 obliqua. 

 luteola. 

 aurea. 



Oregonensis. 

 avara. 

 LXVIII. Strophia incana. 



LXIX. Fig. 1 . Macroceramus Kieneri : the outline natural size. 



Fig. 2. Cylindrclla Poeyana, with enlarged view of aperture and apicial 



whorls. 

 Fig. 3. Cylindrella jejuna. 

 LXX. Fig. 1. Pupa rupicola. 

 Fig. 2. contracta. 



Fig. 3. muscorum. 



Fig. 4. armifera. 



LXXI. Fig. 1 . Vertigo milium. 

 Fig 2. Gouldi. 



Fig. 3. Pupa decora. 

 Fig. 4. Vertigo modesta = ovata. 

 LXXII. Fig. 1. Pupa pentodon. 

 variolosa. 

 Vertigo simplex. 

 Pupa corticaria. 



LXXII. a. Chondropoma dentatum. A pectinate species not included in this 

 volume. See Vol. IV. 

 LXXIII. Helicina orbiculata : the lower line is Hel. tropica. See PL LXXII. a. 

 LXXIV. Fig. 1. Helicina occulta (recent). See PI. LXXII. a. 

 Fig. 2. " (fossil). 



Fig. 3. orbiculata. 



Fig. 4. chryosocheila. 



Fig. 1. 

 Fig. 2. 

 Fig. 3. 

 Fig. 4. 



