510 Mr. D. Sharp and Mr. F. Muir 07i the Comparative 



Sagola sp. (PL LI I fig. 59). 



Median lobe long, slender, tubular and slightly curved, the 

 median orifice at apex, the ventral edge projecting beyond the 

 dorsal. Lateral lobes large, flattened laterally and lying on each 

 side of median lobe, with their base in intimate union with the 

 base of the median lobe. The piece we call basal-piece (bp) 

 appears to belong to the lateral lobes and not to be a true basal- 

 piece, but this point is obscure. Internal sac undifferentiated. 



TricJiOoiyx sulci col lis. 



^Median lobe bulbous with circular, membranous patch on dorsal 

 face ; median orifice at distal end, closed by a chitin plate which is 

 attached at the base of the internal sac ; this plate moves when the 

 sac is evaginated ; median foramen small, about two-thirds from 

 base. Lateral lobes short, flattened, applied closely to the ventral 

 face of the distal end of the median lobe. Internal sac large, 

 armed with strong chitinous plates. 



Bryaxis iwpressa (PI. LXXVII figs. 230, 2o0a and b). 



This appears to he much on the same plan as Sagola, but the lateral 

 lobes in their basal part are consolidated to the sides of the median 

 lobe, and their more median portions apparently meet, while their 

 outer portions remain free, divergent and pointed. If a section be 

 taken through the middle of the aedeagus it should include three 

 lumens, in the middle that of the median lobe (d of fig. 2306) and 

 another on each side, c, the lumen of the lateral lobe. Internal sac 

 undifferentiated. There is considerable difficulty in the interpre- 

 tation and delineation of this structure, as regards the distal jiortions 

 of the median strips of the lateral lobe. In the figures 230 and 230a 

 it is assumed that they pass beyond the median orifice and then 

 meet at the point a. 



Bryaxis jvncorum. 



The aedeagus is on the same plan as B. impressa, but is shorter 

 and more bulbous ; the lateral lobes are consolidated to the median 

 lobe. 



Fhysa in/lata (PI. LI fig. 58). 



Median lobe bulbous, ventral and dorsal walls chitinoixs with a 

 membranous band (m) around the middle, median foramen small, 

 ventral and nearly median. The lateral lobes hard to distinguish 

 from median lobe but appear to be the two pointed sclerites on 

 each side of median orifice (11), but it is possible that the median 

 sclerite (o) on the ventral distal part of the median lobe represents 



