INDEX. 



527 



291 ; Breguet's metallic thermometer, 

 293 ; Negretti and Zambra's thermo- 

 meter, 293. 



Thomson, Sir William, F.R.S., thermo- 

 meter in a sealed glass tube, 296. 



Tisiphonia agariciformis, 74, 167. 



Toxopneustes brevispinosns, 459. 



Tripylus fragilis, 118, 459. 



V. 



Variation. 9. 



Ventriculites simplex, 1S3 ; outer surface, 



484 ; section of the outer wall, 485. 

 Verticordia acitticostata, 464. 



W. 



Wallace, Alfred Russel, on natural 

 selection, 8. 



Waller, Edward, dredging off the South 

 coast of Ireland, Hebrides, and Shet- 

 land Islands, 121 ; on the fauna of the 

 Hebrides, 267. 



Wallich, G C, M.D., F.L.S., the North 

 Atlantic Sea-bed, 24, 271, 302. 



Wright, Professor Perceval, deep dredg- 

 ing off the coast of Portugal, 276. 



Z. 



Zone of deep-sea corals, 16. 

 Zoroaster ftrfgens, 153. 



THE END. 



