LECT. VII.] WORKING OUT OLD STRAINS. 



with many of the members of that much-extinguished 

 Order. Other types, not thus confused in their ambi- 

 tion, worked out the old strain of Metatherian degrada- 

 tion, and taking to one definite line of ascent, put on 

 new specialisations in harmony with their surroundings, 

 and to this day their descendants are the rulers of the 

 forest and the field. 



ADDENDUM TO LECTUKE VII. 

 BIBLIOGRAPHICAL REFERENCES. 



ALLMAN, Prof. GEORGE J., F.R.S., "On the Characters and Affinities 



of Potamogale," Trans. Zool. Soc., vol. vi. plates i. ii., woodcuts 



figs 1-9, pp. 1-16. 1 

 ALSTON, E. N., " On an Undescribed Shrew from Central America," 



Proc. Zool. Soc., 1877, pp. 445, 446. 

 ANDERSON, JOHN, M.D., " On the Osteology and Dentition of Hylo- 



mys," Trans. Zool. Soc., vol. viii. art. 13, plate Ixiv. pp. 453- 



467 (1874). 

 AUSTEN, N. J., "On the Habits of the Water Shrew (Grossopus 



fodiens), Proc. Zool Soc., 1865, pp. 519-521. 

 BARBOZA DER BOCAGE, Dr J. V., " Sur quelques Mammiferes pen 



connus, d'Afrique Occidentale, qui se trouvent au Museum de 



Lisbonne," Proc. Zool. Soc., 1865, pp. 401-404. (Bayonia velox 



vel Potamogale velox) 

 BRANDT, J. K, " On Solenodon," Memoirs of the Imperial Academy 



of St Petersburg, 1832-3. 

 COUES, ELLIOT, " Precursory Notes on American Insectivorous 



Mammals with Description of New Species," U. S. Survey. 



"On Scapanus Americanus," American Naturalist, No. 13, 



p. 189 (1879). 



1 In this paper, besides the excellent figures illustrating the anatomy of this, 

 the noblest of the Insectivorous types, there is a splendid coloured plate (i.) from 

 one of "Wolfs originals. Every such plate is an invaluable addition to zoology. 



