202 
if we except however the place where the sperm-duct opens into 
the atrium. According to the author, the place in question lies 
nearer the internal end of the ejaculatory duct (Fig. 2, 4). Other 
details of minor importance, e. g. the shape of the sperm-funnel, 
the atrium, the spermatheca, the genital setae etc., will be obvious 
from the accompanying drawings. The number of genital setae in 
a bundle is 2—3 in Ch. crystallinus (length about 60 p) and Ch. 
diastrophus (length about 65 p) and 5—7 in Ch. diaphamis (length 
about 130 p). 
