CHAP. VI.| DEEP-SEA DREDGING. 939 
membra licet fractus, animum demisi, nec ab incepto 
desistere potui, Diseant dehine historiae naturalis 
scituli, rariora naturae absque indefesso labore nec 
comparari, nec iuste nosci.”' It does not appear, 
however, that Otho Frederick Miller dredged much 
beyond thirty fathoms, and in his day the knowledge 
of marine animals was not sufficiently advanced to 
warrant any generalization as 
to their bathymetrical distri- 
bution. 
The instrument usually em- 
ployed in this and _ other 
northern countries for dredg- 
ing oysters and clams is a 
light frame of iron about five 
feet long by a foot or so in 
width at the mouth, with a 
scraper like a narrow hoe on 
one side, and a suspending 
apparatus of thin iron bars 
which meet in an iron ring for 
the attachment of the dredge 
rope on the other. From 
the frame is suspended a bag “* 4 oi Peter le 
about two feet in depth, of 
iron chain netting, or of wide-meshed hempen cord 
netting, or of a mixture of both. Naturalist dredgers 
at first used the oyster dredge, and all the different 
dredges now in use are modifications of it in one 
direction or in another; for in its simplicity it is not 
1 Zoologia Danica. Sev Animalivm Daniae et Norvegiae rariorum 
ac minvs notorvm Descriptiones et Historia, Avetore Othone Friderico 
Miiller. Havniae, 1788. 
