THE STOCK. 



19 



Red and the Green orders we must make our 

 selection. 



Of the former these will be found good. Uhyti- 

 phl^Ea pinastrotdes^ the Polys{phon{(je^ CoralUna 

 officinalis , Delesseria alata^ Chondrus crispus, Phyl- 

 lophora ruhens (this, especially when dredged from 

 deep water, is one of the very best)jthe Griffithsice. 

 and some of the CalUthamnia, 



Of the Green weeds Godium tomentosum does 

 pretty well^ and affords food for some MoUnsca that 

 will eat nothing else. The Cladophor(E are good ; 

 Bryopsis plumosa^ a most elegant little plant, 

 flourishes in confinement ; but the Enter omorpTim 

 and JJlv(2 are probably the best of all sea-weeds 

 for our purpose, and the most easily procured on 

 every shore. 



The pieces of rock to which the plants are at- 

 tached should be as clean as possible. All adhering 

 sponges, in particular, should be carefully scraped 

 off, unless they are wanted for immediate examina- 

 tion ; as they are almost sure to die, and corrupt 

 the soil and water with sulphuretted hydrogen, a 

 most nauseous and noxious gas, which turns every- 

 thing black with which it comes into contact. 



Animals. — Of the animals Avhich thrive best 

 in an Aquarium (speaking, of course, only from 

 my own limited experience and observation) the 

 following may be mentioned : — 



Fishes. — The smaller Sticklebacks ; young 

 specimens of the Grey Mullet, which have lived 

 for more than three years in the ZoologTCal Society's 

 Aquarium ; the Blennies and Gobies ; the Spotted 

 Gunnel ; the smaller Wrasses ; the Rocklings ; the 

 Flounder ; the Dab ; the Eels. 



MOLLUSCA. — The Sea-hare; the PeriAvinkle; the 

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