Lander. — Hemiurus crenatus. 



PLATE 4. 



Fig. 37. Section of the seminal receptacle through the neck of its duct. X 760. 



Fig. 38. Section of tlie seminal receptacle, showing the pore at the fundus of the 

 inner vesicle. X 760. 



Figs. 39-41. Giant cells. X 1350. 



Fig. 42. Dorsal view of the female sexual organs, reconstructed from sections. 

 The vitellaria are represented as farther apart than is actually the case 

 in order the better to show the underlying parts. X circa 480. 



