Life Beneath the Waves. 17 



trance facing the main corridor from 

 the entrance hall. On each side are lofty 

 arches forming arcades, having a tier of 

 windows overlooking the terraces, and the 

 roof is in cast iron, resembling the iron 

 roof already mentioned. 



The other main corridor, which is ap- 

 proached from the one running from north 

 to south, corresponds in length to the con- 

 servatory, its width being the same as 

 that of the principal one: it has twenty 

 tanks, part for the exhibition of fresh-water 

 specimens, and part for tropical specimens 

 requiring a higher temperature. The con- 

 servatory has communication, on the south 

 side, by means of the open arcade, to a part 

 of this corridor, which is arranged for 

 small table aquaria requiring minute in- 

 spection. The vaulting, lighting, glazing, 

 and roofing of this corridor are similar to 

 2 



