259 
Although these laws were given as the result of my own 
observations on Ammonites, I can claim no originality as 
regards the law of earlier inheritance; having, as it happens, 
been anticipated both by Hyatt,* and by Wiirtenberger, who 
had also independently arrived at the same conclusions—the 
former from a study of Liassic, the latter from Upper Oolite 
Ammonites. Even they, however, had been forestalled by 
Professor Cope (teste Hyatt). 
It is curious that an extinct group like Ammonites should 
EI TE (Gs (neem Fa eee WER Eaeoncerree |) Da 14 a 
ERRATUM. 
COTTESWOLD FIELD CLUB, VOL. X. 
In page 258, line 1, for “ Inheritance” read “ Heredity.” 
LA AAAA LAVAL SOO 
PART I.—THE LAWS. 
HEREDITY. 
b In regard to Heredity the usual formula is “ Like produces 
4 like.” This is true enough in a general sense; it is decidedly 
untrue in a particular sense. Not only are “‘ sports” of various 
kinds directly contrary to the law that “like produces like ;” 
but, even in homogenesis, the offspring is never exactly like its 
_ parent was at the same time of life. Neither is it exactly like 
other offspring of the same parent. Nevertheless there is a 
definite tendency on the part of the offspring to exhibit the 
*Tn addition to the works to which reference is made in this Paper, I must 
acknowledge my indebtedness to Professor Hyatt’s grand volume, “The Genesis 
of the Arietide ;” Smithsonian Contrib. Knowledge, 1889. 
