146 
of the level of the brain (text-fig. 28, br). The number of the 
tentacular eyes is only about 10 in each group, which corresponds 
to the conditions met with in Cryptophallus wahlbergi Bock. 
The cerebral eyes lie mostly behind a line, connecting the tent-^ 
Text-fig. 28. Enierogonia pigrans var. novæ-zealandiæ. 
Arrangement of cerebral and tentacular eyes. 24 x. Out- 
line of the tentacular rudiments dravvn ; br, indicates 
the location of the brain, 
acular rudiments (text-fig. 28). The size of the ocelli is remarkably 
small. Haswell’s description of Enierogonia ends with a short report 
on the male and female copulatory apparatus based on the diagram 
mentioned above. There is furthermore a discussion on the relati- 
onship of the genus in question and on the ductus genito-intest- 
inalis. As to the anatomy of the genital apparatus, I shall reprint 
the few sentences given by Haswell, since his statement is accurate 
in a high degree also for my specimens. However, in a very 
important respect I am able to complete this description; that is^ 
