260 



CHAPTER XIV. 



MOLLUSCA. 



AQUAEIAN OBSERVATIONS ON MOLLUSCA. — LITTORINA LITTOREA. — LIM- 

 N^A STAGNALIS. — ASCLDIA VITREA (?). — NUDIBRANCHIATE MOLLUSCA. 

 — DORIS BILAMELLATA. — PURPURA LAPILLUS. — SAXICAVA RUGOSA. — 

 PECTEN OPEECULARIS. — PHILLINE QUADRIPARTITA. — SEPIOLA VUL- 

 GARIS. 



MoLLUscA have not yet been introduced very extensively 

 into Aquaria, although they are very interesting objects 

 when admitted. They may never become so popular as Sea- 

 flowers or Crustacea, but earnest students of Nature will 

 find much pleasure and instruction in watching their habits, 

 and examining their structure. Of the few Aquarian ob- 

 servations that have been as yet made, many are recorded by 

 Mr. Clarke, and published in Forbes and Hanle/s 'British 

 Mollusca.' Some f(;w of these are repeated in my ' Popular 

 British Conchology,' and some are added. Having been so 



