41 



Hepatica. Pencils present. 



Harpe trigonate, with corona ; cucullus heavily spined 

 along the base ; clasper a strong arm ; ampulla short and 

 bulbed ; uncus spatulate, very broad at the base ; 

 aedoeagus heavily toothed at the orifice. 



SublustPiS. From Mrs. Hutchinson. 

 Harpe trigonate, with corona ; cucullus spinose on base, 

 deepest in the centre, and hairy ; clasper long and 

 curved ; ampulla long, very slender, ending in a single 

 fine bristle ; clavus rounded and simple ; uncus long and 

 narrow, tongue shaped ; vesica with two very short 

 bulbed cornuti. 



LithOXylea. From Mrs. Hutchinson. 

 Harpe trigonate, with corona ; cucullus with a row of 

 spines on the base, deepest at the ana) angle ; clasper 

 broad and suddenly narrowed toward the tip ; ampulla 

 long and slender, terminating with several bristles ; 

 clavus broad and round, plain ; uncus long and narrow 

 tongue shaped ; vesica with two minute cornuti. 



Polyodon; monog-lypha. Pencils present. 



Harpe trigonate, with corona ; cucullus with a row of 

 spines along the base, deepest at the anal angle ; clasper 

 broad, narrowing towards the tip ; ampulla long and 

 slender, terminating with four bristles ; clavus rounded 

 and plain; uncus long and narrow, tongue shaped; vesica 

 with two bulbed cornuti. 



These three species are wonderfully alike. The 

 most important character lying in the vesica, the smallest 

 pair of cornuti belonging to lithoxylea; those of suhlustris 

 being only just larger, whereas in polyodon they are a 

 fair size. This I consider is sufficient to do away with 

 the old theory, that the first and last are colour varieties of 

 the same species. The ampulla also affords some small 

 difference, suhlustris with one bristle, polyodon with four, 

 and lithoxylea with more probably five or six. Polyodon 

 also has larger built genitalia. 



