L. E. Robinson and J. Davidson 
419 
Fig. 8. Argas persicus c? . The accessory genital gland. A series of transverse sections 
to demonstrate the relations of the different lobes of the gland, the latter being 
distinguished by the various styles of shading. In the figure of the ventral aspect of 
the entire gland, the different lobes are numbered, while the planes of the sections 
are indicated by the corresponding letters. 1 . anterior spongy lobe; 2. posterior 
spongy lobe; 3. 1st pair of lateral granular lobes; .4. median granular lobe; 5. 2nd 
lateral granular lobes; 6. 3 rd lateral granular lobes. In the sections, the antero- 
dorsal and postero-dorsal granular lobes, as well as the 3rd lateral granular lobes, are 
distinguished by horizontal line shading. 
The thick lines in sections A-H represent the sections of the seminal vesicle and 
the vasa deferentia. 
