48 
PLATE II 
Haplotazis forbesi, frontal section through prostomium and brain in plane 
of longest antero-posterior axis of latter. x 105. 
. Haplotazis emissarius, same as above. 
. Haplotazis forbesi, diagram showing location of gonads, ducts, and 
nephridia (of left side). (Double lines indicate large normally devel- 
oped nephridia, and single lines are in somites in which nephridia are 
imperfectly developed, or sometimes absent.) 
Haplotazis emissarius, diagram showing location of gonads, spermathecae, 
and nephridia (of left side). (Double and single lines for nephridia 
are used, as in Fig. 3.) 
. Haplotazis forbesi, dorsal seta. X 175. 
. The same, ventral seta. > 175. 
. The same, longitudinal section through five anterior somites in a plane 
slightly oblique to the median sagittal plane and laterad of the same. 
- The distal ends of ventral setae, the relation of the mouth to the first 
somite, and part of the musculature of the alimentary tract are shown. 
X 70. 
October 1, 1918. 
