1917.] Lang and Chapin, Field Notes on African Chiroptera. 563 



Fig. 19. Hypsignathus monstrosus. Adult male (No. 48657). Dissection 

 from ventral side, showing pharyngeal sacs, hyoid bones, larynx, and general arrange- 

 ment of viscera, eric., cricoid cartilage of the larynx; crico-th., crico-thyroid muscle; 

 d. 1, 2, 3, 4, 5, first to fifth digits; genio-hy., genio-hyoid muscle; hyo-gl, hyo- 

 glossus muscle; mylo-hy., mylo-hyoid muscle; obi. ext., external oblique muscle of 

 the abdomen; obi. int., internal oblique muscle; occ. poll., occipito-pollicalis muscle; 

 or. ph. s., orifice of pharyngeal sac, communicating with nasopharynx; pect. maj., 

 pectoralis major; pect. qu., pectoralis quartus; phar. sac, left pharyngeal sac; st. 

 hy., sterno-hyoid muscle; st. mast., sterno-mastoid muscle; thyr., thyroid cartilage 

 of larynx. § ............ p. 506 



Fig. 20. Hypsignathus monstrosus. Sagittal section of adult male (No. 48655), 

 showing pharynx, vocal organs, and viscera, f p. 507 



Fig. 21. Saccolaimus peli. Wing from above, to show folding of the tip (wing 

 with tip extended shown by dotted line). \ p. 515 



Fig. 22. A. Mimetillus moloneyi. ^. B. Lavia frons affinis. -f. In these 

 two figures the length of head and body is the same, and the extreme difference 

 in relative wing-area is clearly shown p. 537 



Fig. 23. Miniopterus inflatus. Head of male (No. 49334). \ . . p. 540 



Fig. 24. Miniopterus inflatus Thomas. Left wing from below, showing the 

 tip folded. Male, No. 49330. f p. 541 



Fig. 25. Chcerephon russatus sp. nov., to show folding of the tip of the wing. f-. 



p. 550 



Fig. 26. Mops (Allomops) osborni, sp. nov. Right foot, from below, to show 

 hairs on first and fifth digits, (f). a, a spoon-hair enlarged. (^) . . p. 55& 



