644 
F. H. EDGEWORTH. 
Ornithorhyiiclms. figs. 29-33. 
Figs. 29-31. — From longitudinal sections, embryo 8‘5 mm.; fig. 29 is 
the most lateral. Fig. 29, s. 3, r. 2, n. 4 ; fig. 30, s. 4, r. 1, n. 3; fig. 31, 
s. 4. r. 3, n. 4. 
Figs. 32. 33. — From transverse sections, embryo 8‘5 mm. ; fig. 32 is the 
more anterior. Fig. 32, s. 8. r. 1. n. 12 ; fig. 33, s. 7, r. 1, n. 3. 
Echidna, figs. 34-38. 
Figs. 34-37. — From transverse sections, 25 mm. long ( = stage 50 of 
Semon) ; fig. 34 is the most anterior. 
Fig. 38. — From transverse section, young adult 12’5 cm. long. 
Fig. 39. — Transverse section. Dideli)hys aurita, 10 mm. 
Fig. 40. — Sketch cojDied from Bijvoet, showing digastric muscle of 
Bradypus tridactylus. 
Fig. 41. — Sketch showing digastric muscle of Bradyj^us marmo- 
ratus. 
Fig. 42. — From transverse section, Dasypus novemcincta, 30mm. 
Fig. 43.— Sketch of side of head of Manis pentadactyla. 
Fig. 44. — Sketch of muscles on inside of jaw of Phoca vitulina. 
Rabbit, figs. 45-54. 
Fig. 45. — Transverse section, embryo 51 mm. crown-rump length. 
Figs. 46-48. — Transverse sections, embryo 16 mm. crown-rump length; 
fig. 49 is the most anterior. 
Figs. 49-53. — Longitudinal horizontal sections, embryo 23 mm. crown- 
rump length ; fig. 54 is the most dorsal. 
Fig. 54. — Longitudinal horizontal section, embryo 33 mm. crown-rump 
length. 
Pig, figs. 55-64. 
Figs. 55-58. — Transverse sections embryo 15 mm. crown-rump length; 
fig. 60 is the most anterior. 
Fig. 59-63. — Transverse sections, embryo 21 mm. crown-rump length ; 
fig. 68 is the most anterior. 
Fig. 64. — Transverse section, embryo 32 mm. crown-rump length. 
