680 DR. J. MURIE ON THE SKELETON OF TODUS. [May 21, 



toe reversed ; claws short ; tarso-metatarse very long ; hypotarsus 

 with one foramen. Sternum short, broad ; four wide xiphoid clefts ; 

 upper end of furcula narrow, and no hypocleidiuin ; epicoracoid 

 large ; coracoid exceeding the oblique sternal diameter. Prsemaxillse 

 long, wide, straight, and low ; nares elliptical, large ; a great iuter- 

 orbital space ; brain-segment high and full ; post frontal and zygo- 

 matic processes short ; maxillo-palatines large, spongy, with inter- 

 vening cleft ; postpalatal processes absent ; and anterior, elongate, 

 wide, horizontal palatal spaces obtain ; lachrymals spongy, without 

 upper retrocurrent limb ; basipterygoids none ; pterygoids relatively 

 sbort ; mandible flat, symphysis large and broad ; horny margins 

 minutely toothed. 



Habitat of typical and only known (?) genus Todus, Tropical 

 America. 



EXPLANATION OF PLATE LV. 



Separated skeleton of a species of Tody {Todus viridis), showing the most 

 characteristic views of its osseous framework, twice their natural dimensions. 

 All the segments, save the ribs and cervico-dorsal vertebra 1 , are represented. 



Fig. 1. The skull from above. 



Fig, 2. The inferior base of the same. 



Fig. 3. A profile view of the cranium with the mandible. 



Fig. 4. Occipital facies of the skull. 



Fig. 5. Upper or oral surface of the mandible. 



Fig. 6. The lachrymal bone of the left side, seen from behind. 



Lettering applicable to the above : — n, nasal bone ; /, lachrymal ; m.rp, maxillo- 

 palatine ; mx, maxillary ; pf, pterygoid ; q, quadrate ; p, palatal plate, e being 

 the external and i the internal anterior palatal processes ; ios, interorbital space ; 

 pf, postfrontal processes ; z, zygomatic process. 



Fig. 7. The sole and tarsus of the right foot, with the tegumentary covering. 

 I, II, III, IV, the digits respectively. 



Fig. 8. A front view of the bones of the same : tm, tarso-metatarse ; m, meta- 

 tarsal element. 



Fig. 9. Posterior surface of the right humerus : h, an upper view of its head, 

 and c, the inferior end or condylar aspect. 



Fig. 10. Ulna (it) and radius (r). 



Fig. 11. Metacarpus and phalanges, from in front of left wing: I, pollex ; II, 

 distal phalanges of second digit; m 1 , »i 2 , partially united metacarpals. 



Fig. 12. Left femur from behind. 



Fig. 13. Eight tibia (t) and fibula (/) from in front. 



Fig. 14. Upper or proximal end of the tarso-metatarse. 



Fig. 15. Lower or distal extremity of the same. 



Fig. 16. Lateral aspect of the sternum and shoulder-girdle : c, costal process ; 

 r, rostrum. 



Fig. 17. Inferior view of the same. 



Fig. 18. Interior of the pelvis and under surface of the tail-vertebra;. 



Fig. 19. External pelvic side view. 



Fig. 20. Dorsal aspect of the pelvis and termination of the spine. 



