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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 40. 



from Sumatra. A careful comparison of a fine old skull of a female 

 from Am Bay, Sumatra, with the present series from Borneo con- 

 vinces me that the Bornean and Sumatran forms represent distinct 

 species. The skull of Gynogale larbatus is slightly larger than that 

 of 0. bennettii, has more spreading zygomata, a more inflated brain- 

 case and a less conspicuous post orbital constriction, the teeth are 

 larger and heavier, the most noticeable difference being in the last 

 upper molars. Midler's figure 1 of the skull shows that his specimen 

 was of the same type as the present series of Bornean skulls. (For a 

 comparison of measurements of the two forms, see table below.) 

 Externally the two forms are essentially alike. The two Sumatran 

 specimens, however, are rather lighter in color on the under parts 

 than are the Bornean skins. 



Three embryos the size of walnuts. — W. L. A. 



Uterus contained two embryos nearly mature. — W. L. A. 



Measurements of Cynogale bennettii and C. barbatus. 



LUTRA LOVII Gunther. 



1876. Lutra lovii Gunther, Proc. Zool. Soc. London, p. 736. Type-locality, 



Borneo, opposite island of Labuan. 

 1907. Lutra lovii, Lyon, Proc. U. S. Nat, Mus., vol. 33, p. 560, December 24, 1907. 



Two specimens from the Kapuas River region collected in 1905. 



> Verh. Nat. Gesch. Nederl. Bezitt., pi. 17, 1839-1844. 

 2 Measurements by collector. 



8 Last upper molars just appearing through alveolus. 

 * Last milk molars and canines still in place. 



