Xll CONTENTS. 



CHAPTER XXHI. 



HOLOTHUBIA " SEA-CUCUMBER." 



A shipwreck. A "sea-pudding." Description of Holothurm 

 pentactes. Locomotive suckers of Holothuria. The "Nig- 

 ger" or "Cotton-spinner." Habits of Holothurise. Holo- 

 thurise used as food. Trepang-fishery. Extraordinary 

 powers of evisceration. Regeneration of lost parts. Capa- 

 bility of spontaneous division. Spawning and development 

 of embryo p. 234-249 



CHAPTER XXIV. 



SIPUNCULUS. 



Transition from radiism to annulism. Habits of the Sipunculi. 

 Sipunculus Berrihardus. An entailed estate. . . p. 250-254 



CHAPTER XXV. 



NEMEBTES BOBLASII. 



Marsden Rocks. Nemertes, " the Sea Long-worm ;" well en- 

 titled to the appellation. Its habits and general history. 

 Precautions to be observed p. 255-261 



CHAPTER XXVI. 



Excursion from Whitehaven to St. Bee's Head. The Tom 

 Hurd Rock. A pleasant walk. A Hermit. The Hermit's 

 museum. Difficulties in studying the Annelida. An extem- 

 pore aquarium p. 262-269 



CHAPTER XXVII. 



PONTOBDELLA MUBICATA " SKATE-LEECH." 



Habits of the Skate-Leech. Egg-capsules and mode of repro- 

 duction p. 270-271 



