226 



CEYLON PEARL OYSTER REPORT. 



the locking spine (" Einschlagdorn ") on foot 6 and 7 is not notched terminally as in 

 Proto ventricosa, but is simply obliquely truncated. Further, the hand of the second 



Fig. 1. Monoliropus faldmanus, n. sp. Lateral view of nearly adult male; of the hind legs only the last 



one is represented. x 10. 

 ,, Second leg of adult male. x 19. 



young male. x 45. 

 ,, adult female. x 45. 



2. 



3. 

 4. 



5. 

 6. 



7. 



9. 



[of male represented in fig. 1. x 165. 



Mandibular palp 



Maxilliped 



Gill and corresponding leg of young male represented in fig. 3. 



x78. 

 Gill and corresponding leg of adult female represented in fig. 4. 



x78. 

 Lateral view of abdomen of male represented in fig. 1. x 78. 



leg of the old male (fig. 2) is sickle-shaped,* while in the oldest-known male. 

 of J/, agilis it is shaped as in the young males and in the females of the new species. 



* The specific name is based on this character. 



