224 Prof. II. G. Seeley. Researches on the Structure, [Mar. 1, 



3p , aN 3M 



In fact u = -- \- 



3x 3 3s 



_ 



oy oz 3x 



3P 3M 3L 



= ST+2~~a~' 



oz ox o 



where P is the potential function 



. . _, 3N oM 3L 3N 3M 3L 



7. The expressions -5 -, -5 -^-, - 5- cannot be taken 

 oy oz oz ox ox oy 



by themselves to represent the velocities inside and ontside the 

 ellipsoid, for, though they would furnish continuous values of the 

 velocities at the surface of the ellipsoid, they would not make the 

 pressure continuous. 



V. " Researches on the Structure, Organisation, and Classifi- 

 cation of the Fossil Reptilia. Part IX. Section 1. On 

 the Therosuchia." By H. G. SEELEY, F.R.S. Received 

 January 8, 1894. 



(Abstract.) 



This paper discusses the classification of reputed Permian and 

 Triassic Reptilia which have been referred to the Anoniodontia as 

 Theriodonts. 



Lycosaurus, as the genus placed first on the Sir R. Owen's list, is 

 accepted as the type of the Theriodontia. The species Lycosauru* 

 curvimola is regarded as the type of the genus, being the only species 

 in which its characters are fully shown. Galesaurus planiceps, 'which 

 was the type of the Cynodoutia, is probably distinct from Nythosaurus 

 larvatus, and from Sir R. Owen's second type of Galesaurus planiceps 

 of 1887, which is referred to as Thrinazodon Uorhinus. ^Elurosawnts 

 felinus agrees with Galesatirus in having a transverse development of 

 bones of the palate, regarded as palatine and transverse, which abut 

 toward the inner side of the lower jaw. The palate in this genus is 

 found to be covered with groups of small teeth with conical crowns, 



