CONTENTS. xiii 



PAGE 



From the Class Reptilia. 



Prep. 7. Dissection of Common Ringed Snake {Tropido- 

 notus natrix), showing the ai'rangement of the 

 various organs of vegetative life 29-33 



Prep. 8. Vei'tebrae of Consti'icting Serpent (Sp. 1) . . . 33-35 



Prom the Class Amphibia. 



Prep. 9. Dissection of Common Fi'og [Rana tenipora/ria), 

 showing its nervous, circulatoiy, and respii'a- 

 tory systems, together with some of its repro- 

 ductive and digestive organs 35-37 



Prep. 10. Skeleton of Common Frog (Eana teinporaria) . . 38-40 



From the Class Pisces. 

 Prep. 1 1 . Dissection of Common Perch {Perca Jluviatilis), 

 showing its circulatory, nervous, digestive, re- 

 spiratory, and reproductive systems in situ . 40-42 

 Prep. 12. Skeleton of Common Perch {Perca Jluviatilis) . 42-45 

 Prep. 13. Vertebrae of Common Cod (G^ac^Ks worr/ma) . . 45,46 



From the Class Gasteropoda. 



Prep. 14. Shell of Edible Snail (-^eZia; poma^ift) . . . . 47,48 



Prep. 15. Dissection of Edible Snail [Helix pomatia), 

 showing its digestive and reproductive, together 

 with parts of its circulatory and respiratory, 

 sj^stems 48-51 



Prep. 16. Dissection of Edible Snail {Helix jmmatia), 

 showing the position of the heart and of the 

 respiratory cavity 51-52 



Pi'ep. 17. Dissection of Edible Snail {Helix pomatia), 



showing its nervous system 52-54 



From the Class Lamellibranchiata. 



Prep. 18. Shell of Fresh-water Mussel (Anodonta cygnea) . 54-57 



Prep. 19. Dissection of Fresh-water Mussel {Anodonta cyg- 

 nea), showing the course of its digestive tract . 57-60 



Prep. 20. Dissection of Fresh-water Mussel {Anodonta 



cygnea), showing its mantle 60-62 



Pi*ep. 21. Dissection of Fresh-water Mussel {Aiiodonta 

 cygnea), showing its nerve system, and the 

 route taken by the ova in passing from the 

 ovary to the interior of the external gill . . . 62-66 



