6 THE SPECIES OF 



I. The Species of the Pacific Coast. 

 FAMILY LIMACEA. 



Genus ARION Ferussac. 



ARION FOLIOLATUS Gould vol. ii. p. 30, pi. Ixvi. fig. 2. 



Ario7i foUolatus Gould, Ex. Ex. p. 2, fig. 2 a b. 



Genus LEVIAX Ferussac. 



L.IMAX COLUMBIANUS Gould vol. ii. p. 43, pi. Ixvi. fig. 1. 



Limax Columbianus Gould, Ex. Ex. p. 3, fig. 1 a b c. 



FAMILY HELICEA. 



Genus SUCCINEA Drapanaud. 



SUCCINEA NUTTALLIANA Lea vol. ii. p. 81, pi. Ixvii. a, fig. 2. 



Succinea NuttalUana Lea, Tr. Am. Phil. Soc. ix. p. 4. 



Pfeiffer, Mon. Hel. Viv. ii. 523; iii. 15. 



SUCCINEA OREGONENSIS Lea vol. ii. p. 77, pi. Ixvii. c, fig. 2. 



Succinea Oregonensis Lea, Tr. Phil. Soc. ix. p. 1, p. 5, (1844). 

 Pfeiffer, Mon. Hel. Viv. ii. 523 ; iii. 15. 



SUCCINEA RUSTICANA Gould. 



Plate LXXIX. Figure 14. 



T. elongata, ovato-conica, tenuis, pallide virens, impolita, lineis lu- 

 equalibus incrementalibus et crassis striata, subtus convexa ; spira acuta, 

 anf'r. 3 convexiusculis ; apertura ovata, quadrantes tres longitudiuis ade- 

 quans ; columella arcuata, perspicue plicata. (Gould). 



synonyms and references. 



Succinea nislicana Gould, Pr. Boston Soc. Nat. Hist. ii. 187, Dec. 1846; Expe- 

 dition Shells, 31 ; Mollusca of Exploring Ex. p. 28, fig. 29, 

 1852. 

 Pfeiffer, Mon. Hel. Viv. ii. 523; iii. 15. 



DESCRIPTION. 



Shell elongate, ovate conical, rather large, thin and fragile ; pale 

 greenish horn color, surface rude and without lustre, coarsely and 



