XEW OR LITTLE-KXOWV RAT? 



181 



clivosus and acroih are similar to Rh. affinis; but tliey show 

 a pronounced tendency towards a shortening of tlie first phahmx 

 of the fourth digit, to which there is no trace in Rh. afftnis. 



As proved by the above, both in the dentition and in the 

 wing-structure Rh. clivosus and acrotis are on a higher level 

 of development than their Oriental relative. 



Measurements of Rh. clivosus and oci^otis. 





Rh. clivosus. 



RJi. acrotis. 



5 adults. 

 5 skulls. 



f. typica. 

 3 adults, 

 2 skulls. 



aiidersoni. 

 5 immatures, 

 5 skulls. 



Ijrachy- 

 ^nathns. 

 6 adults, 

 4 skulls. 





Min. 



Max. 



Min. 



Max. 



Min. 



Max. 



Min. 



Max.l 





mm. 



mm. 



mm. 



mm. 



mm. 



mm. 



mm. 



mm. 





17.8 



20.6 



18.3 



19 







16.8 



18 



» orreatest breadth . . . . 



14 



15 



13.2 



14 







13.2 



14.5 



Horse-shoe, breadth 





8 





7.8 







6.2 



7.3 



Forearm 



4(3.5 



51.5 



46.5 



49.3 



43.7 



46.8 



45 



48.2 



3rd disrit, metacarpal .... 



31.5 



35 



29.3 



32.8 



27 



29.5 



29 



32.5 





14. S 



17 



15.8 



16.4 



13.8 



14.8 



14.8 



16 



» 2nd phalanx .... 



25 



27.2 



23 



26 



21.8 



23 



23 



25.5 



4th digit, metacarpal .... 



33.2 



37.5 



31.5 



35 



29.7 



31.2 



30.8 



34.3 



» 1st phalanx .... 



8.2 



10.2 



9.7 



10 



8.8 



9.1 



8.8 



9.5 



» 2nd phalanx .... 



15 



16.7 



15 



16.7 



13.5 



15.5 



13.8 



15.8 



5th digit, metacarpal .... 



33 



37 



32.2 



35.2 



30 



32.2 



31.8 



34.8 



» 1st phalanx .... 



10.2 



12 



10.7 



11.1 



9.8 



10 



10 



11 



» 2nd })halanx .... 



12.5 



13 



14 



15 



12.2 



13.8 



12.2 



13.7 



Tail 



25.5 



31 



28 



32.8 







28.5 



31 





19.2 



21 



19.8 



21.2 







19 



21.3 







10 



9.1 



9.8 







8.7 



9.2 



Skull, total length to front of c 



20.7 



21 



20.2 





18.8 



19.5 



18.8 



19.2 



» basilar length to front of c 



16.3 



16.8 



16.4 





15.2 



15.8 



14.7 



15 





9. fi 



9.7 



9.3 





9.1 



9.3 



9 



9 



» Avidth of brain-case. . . 



8.7 



8.9 



8.4 





8 



8.4 



7.7 



8 



» zygomatic width. . . . 



10.5 



10.8 



10 





10 



10.2 



8.8 



9.8 



» maxillary w idth .... 



7. 7 



7.8 



7.8 



7.8 



7 



7.8 



7 



7.2 



» across cibgula of c. . . 



5. 7 



6.1 



5.8 



5.8 



5.1 



6 



5 



5.2 



» Avidth of nasal swellings 



5. 



5.8 



5.6 



5.8 



5.2 



5.6 



5 



5.2 





13.8 



14.2 



13.8 



13.8 



13 



13.5 



12.5 



13 





7.6 



7.8 



7.7 



7.8 



7.6 



7.8 



7 







8 



8.6 



8.5 



8.5 



8.2 



8.5 



7.5 



7.8 



4. R-liinolopliiis cog-natus, sp. n. 



Cotypes. — ad. , preserved in alcohol. Port Blair , South 

 Andaman Island, May 1892. Presented by Prof. E. H. Giglioli. 

 Museo Civico, Genoa. — ■ A second specimen (cf ad., details as 

 above) has been presented to the British Museum i)y Marquis 

 Doria. 



