XU CONTENTS. 



CHAPTER XIV. 



MOLLUSCA. 



PAGE 



Aquarian observations on Mollusca. — Littorina littorea. — Limnseastag- 

 nalis. — Ascidia vitrea (?). — Nudibranchiate Mollusca. —Doris bi- 

 lamellata. — Purpura lapillus. — Saxicava rugosa. — Pecten opercu- 

 laris. — Philline quadripartita. — Sepiola vulgaris 260 



CHAPTER XV. 



FISHES. 



Fishes in Vivaria. — Gasterosteus aculeatus. — Nest-building, — Platessa 

 vulgaris. — Gobius niger. — Mugil cbelo. — Lepidogaster bimacu- 

 latus, — Syngnathus lumbricifonnis. — Fresb-water Fishes. — Lumi- 

 nosity of Fish. — Herrings. — ' Schools and Schoolmasters.' — Lepi- 

 dosiren, or Mud-fish 276 



CHAPTER XVI. 



FRESH-WATER ANIMALS. 



The Green Hydra. — Triton cristatus. — A panic. — Habits. — Frogs. — 

 Fresh-water Tortoises. — Emydidte. — Marine Tortoises. — Turtles. 

 — Habits of Emy« concentrica. — Trionychidse. — Mud-Tortoises. 



