140 DR. A. RANDELL JACKSON ON THE 



lamella characteristica has proved such a useful and constant 

 character in these allied genera that I do not know how such 

 a startling variation could possibly be treated except by the 

 creation of a new species. It is worthy of note that amongst 

 the very numerous males of Agyneta in which I have examined 

 the lamella characteristica there has not been one in which 

 there was the slightest doubt of the identity of the species, or 

 in which any marked variation in this organ occurred. 



