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Sect. XL] 



ZOOLOGY 





ceous- shelled Polygastria fifty-one species, including four 



new genera ; siliceous Phytolitharia twenty-four species ; 

 and of calcareous-shelled Polythalamia four 

 Small packets of the sand of each coast that may be 

 visited, and of the sand or mud brought up with the 

 anchor or the sounding-line, should be preserved; the 

 localities, or latitude and longitude, being precisely noted 

 in each case. 





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AcALEPHiE {Sea-Uulher or Medus(B^ Portuguese Men-of- 

 loar, Jelly-fish, and other floating marine gelatinous 



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animals). 



The brilliant but evanescent hues of many of this class 

 of animals can only be preserved by coloured drawings 

 executed at the time of capture. The solution No. I. 

 will suffice for the preservation of the animals themselves, 

 provided it be changed after they have reniained in it 

 about twenty-four hours, for most of the gelatinous ani- 

 mals, especially the medusae, contain a gi'cat quantity of 



fluid, which, mixing with the preserving liquid, dilutes it 



and renders it unfit for long-continued preservation. The 

 best preserved specimens of these delicate animals are 

 those that have been placed immediately after capture in 

 the solution No. I. diluted with an additional pint of 

 rain water, and which have been aftorwards transferred 

 to fresh solution of the proper strength. Glass- stoppered 

 bottles with wide mouths 



larger Acalephse. 



s are the best adapted for the 



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