SYSTEMATIC INDEX. 



Genus 2. 

 Testaoklla. — Cuvier. 



1. Haliotoidea p. S9, pi. IX, 



f. 24, 25 

 animal... p. 127, pi. XXVI, f. 1 



Genus 3. 



Arion Ferussac. 



Section 1 Shell oval, and concave. 



1. hortensis p. 90 



Section 2 Shell, if any, nearly cir- 

 cular, spongy, and riidimentary. 



2. erapiricorum 90 



Genus 4. 



LiMAX Linnaeus. 



Section 1. 



1. maximus p. 91, pi. IX, 



f. 26, 26* 

 animal... p. 127, pi. XXVI, f. 10 

 variety 11 



2. arboreus, animal 3, 4 



variety 2, 5 



young 6, 7 



LiMAX. 



Section 2. 



3. flavus p. 92, pi. IX, f. 27 



animal p. 128, pi. XXV, 



f. 21 22 

 Section 3. 



4. carinatus pi. IX, f. 2S 



5. agrestis p. 93, f. 29 



animal... p. 128, pi. XXVI, f. 9 



Section 4. 



0. gagates p. 94, pi. IX, f. 30 



animal p. 129, pi. XXV, 



f. 14, 15, 16, 17 

 varieties 18, 19, 20 



7. Sowerbii, animal p. 128, pi. 



XXV, f. 12, 13 



8. ater, animal, young? p. 129, 



pi. XXVI, f. 13 



Family II. — Ancylidje. 



Genus 5. 



Ancylus . — MilUer . 



Section 1. — Animals sinistral. 



1. fluviatilis... p. 94, pi. X, f. 1, 2, 3 

 Section 2. — Animals dextral. 



2. lacustris p. 95, f. 4, 5, 6 



CLASS II. 



CONCHIFERA; OR BIVALVES. 



ORDER MONOMYARIA. 



Family I Mytilacea. 



Genus 1. 



Dreissina Van Beneden. 



1. polymorplia ... p. 98, pi. X, f. 7, 

 8, 9, 10, 11, 12 



ORDER DIMYARIA. 



Sub- Division I Lamellipedes, 



Family I Nayades. 



Genus 1. 



Anodon Bruguiere. 



1. Cygneus p. 99 



