334 SIB JOHN LUBBOCK ON" 



it may he that I have framed the generalization that the omo- 

 hyoid is constantly present in sciuromorphine and myomorphine 

 rodents on the observation of insufficient material. To the 

 presence of the splenius colli, I am not disposed to attach too 

 great importance. When the splenius capitis is largely developed 

 there is not room for all the fibres to be attached to the skull, 

 and some of the posterior ones become inserted into the transverse 

 processes of the anterior cervical vertebrae to form the splenius 

 colli ; still in the Sciuromorpha and Myomorpha this muscle is of 

 rare occurrence. 



The single gracilis is capable of another explanation than that 

 of pointing to a relationship between Pedetes and Anomalurus, 

 The muscle is not constantly double even in the Myomorpha, 

 vv^hile in the Hystricomorpha it is more often single than double, 

 and in the Sciuromorpha always single. We should, I think, 

 expect that animals on the sciuromorphine or hystricomorphine 

 borderland of the Myomorpha would be more likely to have a 

 single than a double gracilis. 



Similarities between Anomalurus and Pedetes in any one of 

 the three muscles discussed would have been hardly worthy o£ 

 notice, and it has been shown that no one of them is by itself 

 of first-rate importance, but the three occurring together do 

 perhaps furnish a somewhat feeble plea for a connection between 

 the two animals. Possibly Winge's and Oldfield Thomas's views 

 might be brought more into harmony by the use of a diagram 

 such as I have suggested (fig. 5, p. 332), in which Anomalurus 

 and Pedetes are not so very far asunder. 



On some Australasian Collembola. By the Eight Hon. 

 Sir John Lubbock, Bart., M.P., F.E.S., LL.D., F.L.S. 



[Eead 1st June, 1899.] 



The following paper contains descriptions of some new species 

 of Collembola from New Zealand and Tasmania, kindly sent me 

 by Mr. A. Dendy of Christchurch, N.Z. The collection also 

 comprised some specimens, representing one or two other 

 species, which however were not in a condition ecabling me to 

 describe them satisfactorily. They have been for some three 



