47 



Janthina. 



Harpe with cucullus sickle form pointed, below the 

 cucullus, projecting over the costa, is a sharp curved 

 arm ; the ampulla arises close to the costa, and is wavy, 

 thickest in the middle ; uncus cygnated ; sedoeagus 

 scobinated at the orifice ; vesica with a short bulbed 

 cornutus. 



Pponuba. 

 Harpe with cucullus, curved and pointed, at the base on 

 the costa is a small projection or fold, beyond this the 

 costa is strongly bulged ; the clasper forms a hood, 

 into which the upper part of the sacculus extends ; the 

 ampulla is very long, with spines branching throughout 

 the length ; uncus long and slender ; the vesica has a 

 circular serrated process, sparsely clothed with short 

 teeth. The base of the vinculum is joined vertically with a 

 strong, round plate of chitine. 



Subsequa; orbona. From R. Tait, junr. and 

 J. E. R. Allen. Pencils absent. 



Harpe tapered to a point, elbowed ; clasper a curved 

 club , uncus tongue shaped, from the upper side of which 

 arises a small peak ; aedoeagus sparsely dentated at the 

 orifice. 



Orbona ; conies. 



Harpe tapered to a point; clasper a curved arm, concave 

 at the extremity ; uncus curled at the tip ; vesica with a 

 mass of small, matted, irregular shaped teeth. 



The sequence from the TriphcsnidcE to the Nochice 

 and Agrotidce is very evident. If we make augur the 

 connecting link with ravida, picking up neglecfa, 

 we easily take up lunigera, suffusa, cinerea, valligera, 

 ripce, puta, exclamationis, segetum, corticea, flammatra, 

 ulvce (which belongs here), VAid plecta, we may then pick 

 up the connecting link prcecox, leading to depuncta and 

 glareosa, after which the anal angle produces a thumb = 

 pollex. We next get ashworthii, umbrosa, triangulum, 

 xanthographa, c-nigrum, ditrapezium, rhomboidea, with 

 an extreme form in baja and alpiiia, and possibly also 

 lucernea. There is then a branch off to the 



