164 MESSRS. O. THOMAS AND H. C. WROUGHTON ON [M;Xr. 17, 



ataA'istic j^lienomenon to which Mr. Boulenger was one of the first 

 to draw attention (P. Z. S. 1888, p. 351). 



As Prof. Giard has defined it, hypotypical regeneration represents 

 a sort of abridgment of the pi-ocesses of reintegration, by which 

 the regenerated part corresponds, not to the state of stable equi- 

 librium prevailing in the given form or type, but to a previous state 

 of equilibrium, usually to the maximum of stability immediately 

 preceding that of the present state of evolution. As flat-fishes 

 are midoubtedly derived from symmetrical forms in which both 

 sides are similarly coloured and sealed, the present case, if correctly 

 interpreted, is another to add to the numerous examples of this 

 phenomenon which have been furnished by various groups of the 

 animal and vegetable kingdoms. 



Mr. Walter A. Kidd, M.D., M.R.C.S., F.R.S.E., F.Z.S., gave 

 an account, illusti'ated by diagrams, of observations he had made 

 I'egarding the effects of pressure on the direction of hair in 

 Mammals. 



The following papers were read ; — 



1. The Rudd Exploration of South Africa.— IX. List of 

 Mammals obtained by Mr. Grant on the Gorongoza 

 Mountains, Portuguese S.E. Africa. By Oldfield 

 Thomas, F.R.S., F.Z.S., and U. C. Wroitohton, F.Z.S. 



[Received February 27, 1908.] 



In order to make the collection from the Pungwe River district 

 of Portuguese S.E. Africa more complete, Mr. Grant spent some 

 weeks in the Gorongoza Mountains, and there made the present 

 collection, which forms a useful supplement to the Beira series, of 

 whi3h we gave an account in our last paper*. 



The series consists of aboiit 150 specimens, belonging to 31 

 species and subspecies, of which we have described three as new, 

 while many are rare forms of which the additional material will 

 be of the utmost service as the different groups are worked out. 



The following are Mr. Grant's notes on the place he worked 

 at : — 



" Tambarara lies on the foothills under the south-western 

 slope of the Gorongoza Mountains ; roughly 300 m. (975 feet) 

 above sea-level, in a very typical stretch of country. Higher up 

 collecting was impossible, owing to the height of the grass. 



" Both the foothills and mountain-slopes are here clothed with 

 virgin forest, in parts of great beaiity. 



" Man}^ of the forest trees are of great size and comprise 'native 

 mahogany,' ' teak,' &c., &c. 



* P. Z. S. 1907, p. 774. 



