Quarterly Journal of ConcJwlogy. 377 



For the guidance of conchologists the best dredging stations 

 and the most favorable times are precisely pointed out, full and 

 lucid instructions as to the making of the dredge, the most ap- 

 proved methods of using it, with full particulars as to the outfit 

 and accessory apparatus shown by experience to be necessary. 



The work is concluded by a full and complete index to every 

 generic and specific name mentioned in the volume. 



"We can cordially recommend Mr. Brown's very excellent and 

 accurate work to all conchologists interested in the Scottish marine 

 fauna or in the progress of science. 



J. W. T. 



Address delivered to the Biologcal Section of the 

 British Association, Plymouth, 16th August, 1877. 



—By J. GwvN Jeffreys, L.L.U., F.R.S., Treas.G. & L.SS., 

 President of the Section. 



This excellent and elaborate address which deals mainly with 

 the results of those deep-sea dredgings that have marked an era 

 in Conchology, and in which the learned author has taken an 

 active and leading part, gives a list of 75 species, all of which 

 have been dredged in depths exceeding 1000 fathoms, during the 

 cruise of the Valorous, in 1S75. Of the 75 species 3 are BracJii- 

 opoda, 39 Concliifera, 11 Solenoconchia and 22 Gastropoda ; and 

 of this number no less than 46 have been described by Dr. 

 Jeffreys as new, and many of the remainder were previously 

 known only by their fossil remains in the pliocene formation of 

 Sicily and elsewhere, thus showing the marvellous distinctness of 

 the fauna of the great depths that the recent researches have 

 discovered. 



In consequence of the greater depths that the past few years 

 have shown life to abound. Dr. Jeffreys distinguishes two new 



