JSHscellaneous. 239 



The only other species of the genus, Feresa intermedia, has a broad 

 muscle, dilated and rounded in front : the teeth are large and thick, 

 the upper hinder one being smaller and more slender ; three teeth on 

 the side of the jaw occupy ly^^ inch ; there are eleven teeth on each 

 side above, and twelve below. 



The skull of the new species {Feresa attenuata) is very like that of 

 the former ; but the beak, instead of being dilated in front, becomes 

 gradually narrower and is rather acute in front. Its teeth are con- 

 siderably smaller and further apart. The three teeth in the middle 

 of the sides of the jaw occupy 1^ inch of the margin ; the two or 

 three hinder teeth on each side of the upper jaw are much smaller 

 and more slender than the others. The total length of the skull from 

 the condyle to the front of the beak is 13^ inches ; the width of 

 the skull over the front of the eyebrows is 8 inches ; width of the 

 beak at the front of notch 4^ inches, 

 inches ; length of tooth-line 5 inches. 



The genus Feresa is known from the other Lagorhynchina by having 

 only ten or twelve teeth on each side of the jaw ; whereas all the 

 other genera have much more numerous teeth, from twenty to thirty, 

 and the teeth in all the other genera are slender. Feresa intermedia 

 has such large teeth that it was first described as an Orca, and was 

 thought by Mr. Flower to be the young of that genus. In Feresa 

 attenuata the teeth are much more slender and further apart, and in 

 this respect resemble the teeth of the other genera of the tribe ; but 

 it is at once known by the limited number. It also agrees with the 

 genus Electra in the attenuated form of the beak. 



Note on Iphiclides Ajax. By Kaphael Meldola. 



In a communication made by Mr. S. H. Scudder to the Natural 

 History Society of Boston in October last, and reprinted in the pages 

 of this Magazine*, the author has done me the favour of making 

 some remarks on a paper published by me in the ' Annals and 

 Magazine of Natural History' for October lastf. Having waited 

 in vain up to the present time for the arrival of the Society's ' Pro- 

 ceedings,' I think it advisable to publish these remarks without 

 further delay. 



I am indebted to Mr. Scudder for pointing out the true significa- 

 tion of Mr. Edwards's tabulated results — a signification which it is 

 difficult to gather from the text. It is to be regretted that Mr. 

 Edwards did not affix an explanatory note to the numerical results 

 given in his Table in the ' Butterflies of North America.' As this 

 table now stands, it is apt to be taken for a general summary giving 

 results that are to be considered true for each of the polymorphic 

 forms of the insert, under all conditions. "With regard to the issue 

 of Mr. Scudder's remarks, however, I may state that these do not 

 in any way affect the main conclusion arrived at by mc in the 



* Ser. 4, vol. xiii. p. 18G. t Vol. xii, p. 301 et seqq. 



