EXPLANATION OF PLATE XXIL 



YiG. 1. — Gravid female of PJiysunio irdcrofteroides. M.=marsupiiim. 



Fio. 2. — Horizontal longitudinal section of a water-tube of cravid mar- 

 •supiuni showing the glochidia in the water-tube {u\ t.). 



Fig. 3. — Lateral view of a glochidium. a.m. = adductor muscle ; an. 



= anlagen. 

 Fig. 4. — Anterior end view of the glochidium. <S.c.=sensory cells. 



Fig. 5. — Glochidium after removal of one of the shells. A. m.=adductor 

 muscle ; fflw. = anlagen : /.=fiange. 



PiQ, 6. — Transverse section of a glochidium through the region of the 

 adductor muscle {a. m.). M.=niantle. 



YiQ. 7. — Transverse section of a glochidium through the anlagen {an.) 



of the various organs. 

 PiQ, 8, — Glochidium on the edge of the caudal fin of Nemachilus 



brunneanus. 

 Pig. 9. — Glochidium on the caudal fin. of N. hrevis. 

 Fig. 10. — Lateral view of a glochidium of P. jerrugiyieus. 

 Pjo, 11 A glochidium of P. ferrugineus embedded in the caudal fin of 



Barilius auropurpureus. 



Figures 2-9 aro from specimens of P. microp'eroides. 



