e.gl, 



/• 

 9t- 

 gs. 

 gl. 

 I. 





PLATE I. 





antennae. 





mr. stands for retractor muscle of the thorax, 



cement glands. 





0. , 



, orifice of the sac. 



muscular fibres. 





te. , 



, oesophagus. 



thoracic ganglion. 





»■• > 



, oesophageal ring. 



supracesopliageal ganglion. 





St. 



, stomach. 



gland of unknown nature. 





t. 



, testis. 



thoracic appendages. 





vd. 



, vas deferens. 



mouth. 





vs. , 



, vesiculae seminales. 



Fig. 1. Male of Scalpellum regium (Wyv. Thorns.), Hoek ; magnified 94 diameters. 



Fig. 2. Nervous and alimentary systems of this male; magnified 275 diameters. 



Fig. 3. Antenna of the male ; magnified 275 diameters. 



Fig. 4. Transverse section of the supracesophageal ganglion where it is in relation with 

 the oesophageal ring; magnified 275 diameters. 



Fig. 5. Transverse section of the thoracic ganglion and the thorax with its appen- 

 dages ; magnified 275 diameters. 



Fig. 6. Spermatozoa and spermatozoid mother-cells; magnified 575 diameters. 



Fig. 7. Epithelium of the sac and muscular fibres in a young stage of development; • 

 m9,gmfied 275 diameters, 



