38 INDEX TO PLATES. 



PLATE LXVI. 



Fig. 1. LniAX CoLCMBiANUS Gould, p. 43. AVith a 

 front view of the lieaJ, the form of the calcareous element, 

 and the anterior portion of the body when contracted. The 

 wood-cut following the descrii)tion represents the lingual 

 booklets of Helicina orbiculata, p. 352. 



Fig. 2. Ariox foliolatcs Gould, with magnified 

 patch of the foliated surface, p. 30. 



PLATE LXVIL 



Vaginulus Floridanus Binney.p. 17. 



PLATE LXVIIa. 



Fig. 1. ViTRixA PELLUCIDA Muller, ( r. Umpida, 

 Gould,) p. 55. 



Fig. 2. SucciNEA coNCORDiALis Gould, p. 82. 

 Fig. 3. Sdccinea ovalis Gould, p. 78. 

 Fig. 4. Sdccinea Nuttalliana Lea, p. 81. 



PLATE LXVII b. 



Fig. 1. SccciNEA CAMPESTRis Say, p. C7. 

 Fig. 2. SucciNEA OBLiQUA Say, p. 09. The variety 

 described by Mr. Lea as Succinea Totteniana, page 72. 

 Fig. 3. SucciNEA OBLiQDA Say, p. 69. 



PLATE LXVII c. 



Fig. \. SucciNEA LUTEOLA Gould, p. 75. 



Fig. 2. SucciNEA Oregonensis Lea, p. 77. 

 Fig. 3. SucciNEA AUREA Lea, p. 76. 

 Fig. 4. SucciNEA AVARA Say, p. 73. 



