TITANOSOMA AND POLYMICRODON IN ENGLAND 167 



EXPLANATION OF PLATES. 



Plate IX. 

 Brachychaeteuma bagnalli, nov. gen. et sp., Verh., male. 

 Fig. 1. Left pleurotergite of the third abdominal segment, seen from 

 above, x 220 ; pz prozonite, mz metazonite, h lateral pro- 

 minence, b anterior bristle, bi posterior bristle. 



,, 2. Left posterior gonopod with sternite, seen from in front, X 220 ; 

 co coxite, prf prefemur, trt tracheal pocket, tr tracheae, km 

 transverse muscle, k rib on coxite and prefemur, st stigma. 



„ 3. Coxa and neighbouring process (a) of the prefemur of a hinder 

 gonopod, seen from behind, X 125. 



,, 4. Anterior gonopod with sternite, seen from in front, x 220 ; z peg, 

 a flap, pr lateral processes, and d middle process of the syncoxite, 

 m and mi muscles from the support (trt) to the syncoxite ; fo 

 transverse groove-like hollow between the syncoxite and the 

 telopodites, the latter resembling drinking horns and possessing 

 at their base a sac-like cavity (trgr) ; w beaded edge of the 

 latter. 



,, 5. Syncoxite of the anterior gonopods, represented from behind, 

 X 125 ; co horn-like processes, no lateral thickenings, q trans- 

 verse buckle-piece. 



Plate X. 



Figs. 1-3. Brachychaeteuma bagnalli, nov. gen. et sp., Verh., male. 



Fig. 1. Right pleurite of the head (cheek-piece), seen from below, x 220 ; 

 uk inferior groove, bounded externally by serrated rib ; 

 pi anterior pleurite, pli posterior pleurite. 

 „ 2. Labrum of the male, with notched flaps at the sides, x 220. 

 ,, 3. Inner palpus, central-body, and processes (Spaltwarzen ; verruca 

 fissce) on the anterior border of the lamellae linguales, x 220. 



Figs. 4-7. POLYMICRODON LATZELI, Verh. 



,, 4. One half of the syncoxite of the anterior gonopod, seen from 

 without, X 125 ; gr row of awns, s spinous process, z tooth- 

 like process, p cushion. 



,, 5. A complete syncoxite seen from behind and somewhat from the 

 side, x 125. (References as above). 



,, 6. A few of the awns of the syncoxite with the small spines at their 

 base, seen from without, X 220. 



„ 7. A cheirite seen from the inside, X 125 ; h the grapnel, lo the 

 striated flap, fo the groove between the flap and the stem of the 

 cheirite. 



