72 Setentific Intelligence. 
varieties” of “ QO. borealis.” So Mr. Duncan’s remark that 
“had Dana waited a little longer he would have had the opportu- 
nity of quoting correctly,” was, to say the least, quite uncalled for, 
and unbecoming to him, since the alleged error originated with | 
Mr. Duncan himself. 
But the peculiar injustice of the critic is, perhaps, best seen in 
his failure to give Dana credit for his extensive original investi- 
gations upon the structure of coral reefs and islands, and his inti- 
mation that the facts and theories are mostly borrowed, He says, 
“the chapters on the structure of coral reefs and islands add 
little to the knowledge which Darwin, and Jukes, and Ho 
stetter have given us; but Dana’s great powers of illustration en- 
able him to reproduce the details with which we are so familiar, 
thanks to these authors, in very engaging forms.” Professor 
h- 
The fig 
atlas of Dana’s Zodphytes, which were originally drawn from 
