♦ 
BY R. BROOM. 485 
gone under a variety of designations, I would propose the name 
of Prevomer as more in harmony with the general terminology 
than " Anterior Vomer," and also as Kitchen Parker evidently 
regarded his " Anterior Paired Vomer " as an element quite 
distinct from the palatine process of the premaxillary and only 
exceptionally present in the mammalian skull. 
The following table gives the chief synonyms and homologies 
of the Prevomer :— 
Prevomer (Broom) = Palatine process of premaxilla in mammalia generally. 
= Dumbbell-shaped bone, or Os paradoxum in Ornitho- 
rhynchus. 
= Anterior vomer, in Ornithorhynchus (Wilson). 
= Anterior paired vomer, in foetal Insectivora, d?c. 
(Parker) 
= Prepalatine lobe of vomer, in Caiman (Howes) 
— Vomer, in Lacertilia and Ophidia (Owen, Parker, &c.) 
Further research may extend the homology to the " vomer " in 
Amphibia and fishes, but this I have not had an opportunity of 
ascertaining. 
In conclusion I must acknowledge my indebtedness to Prof. 
Wilson for various kindnesses; to Messrs. Etheridge and Waite 
of the Australian Museum for identifying for me the bat and 
flying-fox examined; and to my father, Mr. John Broom, for 
making abstracts of papers, not otherwise accessible to me. 
