THE CHROMOSOME COMPLEX OE CULEX PIPIENS. 287 
The Chromosome Complex of Culex pipiens. 
Part II. — Fertilisation. 
By 
Monica Taylor, S.N.D., D.Sc. 
With Plate 20 and 1 Text-figure. 
* Contents. 
page 
Introduction . . . . . . 287 
Material and Methods ..... 289 
The Reproductive Organs .... 295 
The Egg . . . . . -295 
General . . . . • . 298 
Summary ...... 299 
Note . . . . . . 299 
Introduction. 
In the summary of a paper, entitled “ The Chromosome 
Complex of Culex pipiens” ( 4 ), it was stated that: 
(1) The somatic number of chromosomes is three, both in 
the male and female. 
(2) The number of chromosomes in the spermatogonia, as 
well as in the primary and secondary spermatocytes and 
spermatids, is three. 
Two alternative suggestions as to the cause of this apparent 
anomaly were offered : 
(1) The non-participation of one of the gametic nuclei in 
the formation of the “ zygote” in fc fertilisation.” 
