1. Monostyla cornuta  . 
la. 
da. 
4b, 
Ac. 
9a. 
9b. 
Ye. 
10. 
10a. 
10D. 
11. 
lla. 
11d. 
Lites 
11d. 
Ile. 
inGe 
12. 
12a. 
13. 
13a. 
26. 
” » 3 
” A ‘ 
Monostyla lunaris : 
£ x 
” . 
Monostyla quadridentata 
Monostyla bulla . 
Monostyla Lordii 
Metopidia lepadella 
Metopidia triptera 
” ” . 
Metopidia oxysternon 
” ” . 
, » 
” y 
” ” x 
” ’ 
’ ’ 
Metopidia acuminata . 
” 
” 5 ; 
Metopidia rhomboides 
x * 
x 5 
Metopidia solidus 
Colurus dactylotus 
a 
Colurus pedatus 
PLATE XXV. 
dorsal view . ; ' ‘ . 
side view ‘ : A : 5 
transverse section . ‘ ; : 
dorsal view . 2 5 2 5 
side view : A 5 : 
year view. % : ‘ 5 
dorsal view . : 
dorsal view . : : . 
side view , 4 : 5 
year view. 5 . : z 
front of lorica 7 : : 5 
dorsal view . : : . 
dorsal view . : 5 5 
side view Fi ; 7 
transverse section : : 
dorsal view . : 5 5 5 
side view 
front view : 
ventral view . : s : . 
side view ; Fi ; 
lorica; ventral view . A ‘ 
lorica; dorsal view 
transverse section 
head; side view . : 
trophi . 5 é ¢ ; 
pectoral notch of lorica c 5 
hind end of ventral plate, showing 
the foot . 3 
dorsal view 
side view 5 5 j 
lorica; ventral view . . : 
transverse section . 
dorsal view . $ . . E 
side view 3 : ‘ 
transverse section 
dorsal view . , 5 : 
ventral view, head retracted . 
side view , 5 ; 
rear view : . ; 
front of loriea é ‘ : 3 
hind end of loriea. 
stomach 
dorsal view . : ‘ . = 
side view 
side view 
foot and toes 
orifice for 
