668 
ME. W. K. PARKER ON THE STRUCTURE AND 
Dactylethra capensis. — Tadpoles at their largest size. 
Fig. 3. Chondrocranium of Tadpole, upper view ; 3rd stage. X 6 diameters. 
Fig. 4. The same skull, seen from below. X 6 diameters. 
PLATE 58. 
Dactylethra capensis. — Tadpole : 'young and adult. 
Fig. 1. Hyoid and branchial cartilages of one side, from below ; 2nd stage. X 6 diams. 
Fig. 2. Cranium of young Dactylethra with large legs and tail ; 4th stage. X 10 diams. 
Fig. 3. The same skull, seen from below. X 10 diameters. 
Fig. 4. Mandible and hyoid of the same skull. X 10 diameters. 
Fig. 5. Flyoid and branchial arches of the adult Dactylethra , upper view. X 3 diams. 
Fig. 6. Mandibular ramus of same, inner view. X 3 diameters. 
PLATE 59. 
Dactylethra capensis. — Adult. 
Fig. 1. Chondrosteous cranium, with roof-bones removed ; upper view. X 3 diameters. 
Fig. 2. The same, seen from below. X 3 diameters. 
Fig. 3. The same, side view. X 3 diameters. 
Fig. 4. The same, seen from behind. X 3 diameters. 
Fig. 5. Endocranium, front part, seen from above. X 3 diameters. 
Fig. 6. The same, lower view. X 3 diameters. 
Fig. 7. Auditory region of same skull ; inverted view, with dislocated “ columella.” 
X4-|- diameters. 
Fig. 8. Framework of auditory region ; side view. X 4|- diameters. 
Fig. 9. Front view of quadrate region, with projecting parts removed. X4^ diameters. 
PLATE 60. 
Pipa monstrosa. — Embryo f inch long, and young (ripe), 6J to 7\ lines long. 
Fig. 1. Embryo attached to yelk-mass; side view. x5 diameters. 
Fig. 2. The same ; upper view. X 5 diameters. 
Fig. 3. Chondrocranium of the same; lower view. Xl5 diameters. 
Fig. 4. Detached visceral arches of same ; upper view, x 20 diameters. 
Fig. 5. Chondrocranium of larger young Pipa-, upper view. Xl4 diameters. 
Fig. 6. The same skull; lower view. Xl4 diameters. 
Fig. 7 . Mandible and branchial arches of the lesser young Pipa ; upper view. X 14 dia- 
meters. 
Fig. 8. Section through nostrils of larger young Pipa. X 30 diameters. 
