156 Rev. J. T. Gulick on Divergent Evolution 



much greater width between the mastoid processes and also iii 

 the proportions of the teeth. 

 The second incisor is the most 

 vertically extended and largest 

 of the upper unicuspidate teeth, 

 presenting in this respect a 

 character almost peculiar to 

 the species ; the third uni- 

 cuspidate tooth is about the 

 same size as the second, but 



considerably exceeds the fourth unicuspidate tooth in vertical 

 extent ; the penultimate premolar stands in the tooth-row and 

 is nearly as large as in 8. alpinus. These are the characters of 

 the teeth in the four specimens available for examination ; 

 but, owing to all being examples of full-grown animals, the 

 cusps are more or less worn, so that it is impossible to give 

 their exact relative size. 



The following are the measurements of an adult female 

 specimen preserved in alcohol : — Length, head and body 68 

 millim. ; tail 53 ; eye from end of muzzle 12 ; ear, length 7 ; 

 elbow to end of middle digit, without claw, 20 ; manus to 

 extremity of middle claw 11 ; ditto, without claw, 8^ ; pes 

 14 ; distance between tips of first upper incisor and last pre- 

 molar 5. 



Hah. Saghalien Island ; Nikolajewsk, at the mouth of the 

 Amur River. 



Type, an adult female, No. 1535, preserved in alcohol in 

 the St. Petersburg Museum, collected by Dr. L. von Schrenck. 

 This species by its dentition belongs to that section of the 

 genus characterized by the large size of the penultimate pre- 

 molar, which also stands in the tooth-row, and of which S. 

 alpinus and S, minutus are typical ; but it differs, as above 

 remarked, from all known species in the remarkably large 

 size of the manus and its claws. 



XX. — Divergent Evolution and the Darwinian Theory. 

 By Rev. John T. Gulick, Ph.D.* 



In a paper on " Divergent Evolution through Cumulative 

 Segregation " (Journ, Linn. Soc, Zoology, vol. xx. pp. 189- 

 274) I have endeavoured to show that selection, whether 

 natural or artificial, is a process that has no tendency to pro- 

 duce divergent evolution, unless different sections of one 



* From the ' American Journal of Science,' January 1800, pp. 21-30. 



