496 MR. A. H. G. DORAN ON THE MORPHOLOGY 



Figs. 10-18. Left ossicular 10, Chrysochloris ; 11, Centetes ecauclatus ; 12, Ericulus nigrescens ; 13, Eri- 

 naceus europceus ; 14, Gymnura rafflesii; 15, Macroscelides alexandri; 16, Rhynchocyon cernei; 

 17, Tupaia tana; 18, Galeopithecus. 



Fig. 19. Left malleus : Petrodromus. 



Fig. 20. Sight malleus : Asellia (Phyllorhina) tridens ; acpm, accessory processus muscularis. 



Fig. 21. Eight malleus : Plecotus auritus (outer aspect). 



Fig. 22. Left ossicula : Vespertilio nattereri. 



Fig. 23. Right malleus : Mormops blainvillii. 



Fig. 24. Left malleus : Molossus obscurus. 



Fig. 25. Left ossicula : Vesperugo serotinus. 



Fig. 26. Right ossicula : Pteropus edulis. 



Fig. 27. Left ossicula : Pteropus edulis. 



Fig. 28. Left malleus : Balana mysticetus. 



Fig. 29. Right incus and stapes : Balcena mysticetus. 



Fig. 30. Right malleus : Balanoptera rostrata. 



Fig. 31. Right incus and stapes : Balcenoptera rostrata. 



Fig. 32. Left malleus : Megaptera nova-zelandicc. 



Fig. 33. Right malleus : Neobalcena marginata. 



Fig. 34. Left malleus, right incus and stapes : Physeter macrocephalus. 



Fig. 35. Left ossicula : Hyperoodon rostratus. 



Plate LXIII. 



Fig. 1. Left malleus and incus: Berardius arnuxii. 



Fig. 2. Left ossicula : Delphinus. 



Figs. 3-12. Right malleus : 3, Delphinus; 4, Globiocephalus ; o,Phoccena; 6, Pseudorca meridionalis ; 7, 



Orca; 8, Delphinapterus albicans; 9, Monodon; 10, Inia geoffroyii; 11, Lagenorhynchus ; 12, 



Platanista. 

 Fig, 13. Left malleus : Balcena australis, in situ {pet, petrous bone; tb, tympanic bone). 

 Fig. 14. Left malleus : Felis, for comparison of the homologous parts in figs. 13, 15, 16, 17, 18, &c. 

 Figs. 15-17. Left malleus : 15, Globiocephalus ; 16, Monodon (with tendon of tensor tympani and process 



from membrana tympani attached) ; 17, Platanista. 

 Figs. 18, 19. Left malleus: 18, Berardius arnuxii; 19, Mesoplodon (Oulodon) grayii. 

 Fig. 19 a. Right malleus : Mesoplodon grayii (inner aspect, showing the facets, the groove for the process 



from the tensor tympani, and the pointed posterior extremity of the head) . 



Right incus : Platanista.^ 



Left malleus-: Manatus americanus. 



Right malleus : ditto. 



Right incus : ditto. 



Left incus , ditto. 

 Fig. 25. Stapes : Manatus senegalensis. 

 Fig. 26. Left malleus : Halicore australis. 

 Fig. 27. Right malleus : ditto. 

 Fig. 28. Right incus : ditto. 

 Fig. 29. Left incus : ditto. 

 Fig. 30. Stapes ditto. 



