Geology and Natural History. 61 
ing so involves a concession, though not essential one to the idea 
of syntropy. 
inally, Dr. Coues has accepted from the writer a nomenclature 
of ideas, (Antitypy, &c.,) which was itself based upon ian 
‘ . GW. 
. Supplement to “ Annélides chétopodes du Goife de Naples.” 
—Claparéde has published a Supplement to the Annelids of the 
b] 
pelasgica and Heteronereis grandi wing ¥ 
lute identity, with the exception of the peculiar foliaceous append- 
eggs in this presumed agamous Heteronereis stock, he came to the 
conclusion that, 
herels were onl orms in series of generations still un- 
hereis were only sexual forms ‘ 
Nereis, and interprets these facts in favor of a metamorphosis of 
N ereis into Heteronereis. 
This was the condition of the problem when Claparéde resumed 
the subject and showed conclusively (from the study of living 
Annelids) that there is a genetic relation between Nereis and 
: ms) we have first a sexual form as Nere ‘ 
forms as eteronereis, and a fourth hemaphrodite form discovered 
