40 
Transactions Texas Academy of Science. — 1906. 
Fig. 15. Superficial muscles of back and outer arm. 
Fig. 16. Deeper muscles of breast and inner arm. 
Fig. 17. View of shoulder muscles seen from the front to show 
the musculus deltoideus minor. 
Fig. 18. Muscles of shoulder and chest. 
Fig. 19. Deeper muscles of back. 
Fig. 20. Muscles of upper arm. 
Fig. 21. Ventral view of viscera. 
Fig. 22. Ventral view of intestine, showing its convolutions. Parts 
separated for sake of clearness. The dotted lines represent the por- 
tion of the intestine covered by superficial folds. 
Plate III. 
Bubo virginianus. 
Fig. 23. Ventral view of posterior portion of alimentary tract. 
Fig. 24. Dorsal view of liver, gall bladder and duodenum. 
Fig. 25. Muscles of shoulder and chest. 
Fig. 26. Muscles of wing. 
Fig. 27. Ventral view of portion of the brain. 
Fig. 28. Muscles of upper arm and other muscles inserting on it. 
Fig. 29. Ventral view of viscera. 
Plate IV. 
Bubo virginianus. 
Fig. 30. Muscles of upper wing. 
Fig. 31. Dorsal view of brachial plexus, anterior end turned 
towards left. 
Fig. 32. Female urogenital organs, ventral view. 
Fig. 33. Superficial muscles of back and outer wing. 
Fig. 34. Dorsal view of floor of mouth. 
Fig. 35. Pecten of the eye seen from its free apex. 
Fig. 36. Lateral view of pecten. 
Fig. 37. Superficial muscles of chest and inner wing. 
Plate V. 
Aeronautes melanoleucus. 
Fig. 38. Dorsal view of brain, with outline of head and nostrils. 
Fig. 39. Brain viewed from left side. 
Fig. 40. Ventral view of brain. 
Fig. 41. Dorsal view of brachial plexus. 
