13 



times a long shaft extending beyond the cucullus, or it 

 may be only a flap on the skin. Below the ampulla, on 

 the costal side, is often a small finely spined prominence 



called The Editum. 



At the base of the uncus, on the inner surface of 

 the tegumen, is an opening through which passes, a thin 

 transparent tube which is The Anus. Attached to the 

 anus on the upper surface, is a process only present in 

 some of the Noctitidce which is The ScaphlUm 

 (of Gosse). This is well worth further study. There is 

 often another process somewhat similar, attached 

 beneath the Anus, which I propose to call The 

 Subscaphium, These organs are sometimes united, 

 forming a tube, through which the anus passes. 



My friend. The Rev. C. R. N. Burrows and I, have 

 examined these organs most carefully and have come to 

 the conclusion, that they are only an armature of the 

 Anus. 



Beneath the anal aperture, and attached to the 

 same articulation as the harpes, is a band like sheath, 

 through which the penis is protruded, this I have 

 previously called The Juxta. Although sometimes only 

 a transparent tube, it is often decorated with a shield- 

 like plate in front, which may extend right round the 

 band until it becomes a really complicated organ (vide 

 Tceniocampa gothica). 



The Penis itself is a tube of varying length and 

 width, bulbed at the base. The outside covering is 

 called The y^doeagUS, and consists of a stout tube, 

 with an opening in the side near the base (which receives 

 the seminal duct), and contains the eversible, balloon-like, 

 membrane The Vesica. This is attached to the 

 irregular edge of the orifice of the iedoeagus. This 

 vesica is of the most delicate texture and can only be 

 examined when extruded, it is usually furnished with 



