[* 7 ] 
think it a great Happinefs, if this Relation may be of 
any Ufe or Satisfaction. I am, 
SIR, 
Tours moft obliged and 
m°ft affectionate, 
B. Cooke. 
X. An Account, by Mr. John Eames^ F. R. S„ 
of a Book intituled, Jacobi Theodori Klein 
Hiftoriae Pifcium Naturalis promovendae 
Miffus primus Gedani, 1740. 4 t0 * Or, The 
fir ft Number of An Eflay towards promoting 
the Natural Hiftory of Fifties, by Mr . Klein, 
Secretary of Dantzick, and F. R, S. 
Read Feb. 4. A Lthough the Natural Hiftory of 
1741-z. Tx, Animals has been vaftly improved, 
lince feveral of the worthy Members of the Royal 
Society, both at Home and Abroad, have taken 
it under their Consideration ; yet there ftil-1 remain 
fome things to be known, in order to render it full 
and complete. As particularly, concerning the Hear- 
ing of Fifties, it is remarked, that in no Fifties befide 
the Cetaceous Kind, have hitherto been found any 
Auditory Paflages, or Ear-holes 5 and whether all Fifh 
hear or no, is a Queftion not yet fully determined, 
notwithftanding the Experiments alledgcd to prove the 
Affirmative. 
