A REVIEW OF THE CHROMOSOME NUMBERS IN THE 
METAZOA 
Parr II 
ETHEL BROWNE HARVEY 
I. INTRODUCTION 
The first part of ‘A Review of the Chromosome Numbers in 
the Metazoa’ appeared in 1916 in Volume 28 of this Journal. 
This comprised a tabulation of all chromosome numbers in Anne- 
lida, Arthropoda and Coelenterata published until the end of 
1915. The present paper includes a supplementary list of num- 
bers in these three groups which have been published from the 
beginning of 1916 to date (Dec. 1918), and a complete tabula- 
tion of all the other Metazoa from 1878 to date. As in the 
previous paper, the species are classified and the various phyla, 
genera, families and species are arranged in alphabetical order. 
Access has been had in all cases to the original publications, and 
all authorities are quoted in order of priority, whether in agree- 
ment or otherwise. The list includes only normal animals; the 
chromosome numbers of hybrids and of abnormal and patho'og- 
ical cases are not included. Some of the most important abbre- 
viations used are the following: 
chrom= chromosome pa= parthenogenetic 
cl=cleavage p. b.=polar body 
-cyte=spermatocyte or oocyte prim. =primordial 
div = division pron=pronucleus 
el=elements som= somatic 
emb=embryo spe=spermatocyte 
fert=fertilization spg=spermatogonia 
oog = oogonia -tid=spermatid or ootid 
‘X to pole’ means that X passes undivided to one pole. 
‘XY to poles’ means that X and Y pass to opposite poles. . 
_ ‘From correction in’ means that the tabulation as given is a correction of an 
earlier account. 
1T wish to call attention to a misplacement in Part I. On page 18, the group 
beginning with Chrysochus auratus and ending with Trirhabda virgata belongs 
with the Chrysomelidae on page 16 and not with the Hydrophilidae. 
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