306 SUPPLEMENT. 



This specimen is described and figured (reversed) by Filliol 

 in the ' Ann. Sci. Geol.' vol. vii. art. 7, p. 180, pi. xxix. 

 fig. 143, and pi. xxx. figs. 144-146. Purchased, 1885. 



M. 2347. Part of the left ramus of the mandible of a smaller speci- 

 men, showing the last four cheek-teeth; from Caylux. 

 This specimen agrees with No. M. 1530, and is inter- 

 mediate in size between the mandible of the last specimen 

 and the larger examples of H. vuljoinus. Purchased, 1885, 



M. 2353. Fragment of the left ramus of the mandible of a young 

 individual ; from Caylux. In this specimen pm. 1, mm. 3, 

 mm. 4, and ^71 are in use; the alveoli of the milk-canine 

 and mm. 2, as well as the germs of the incisors of the per- 

 manent canine and of pm. 2, are also displayed ; the cavities 

 for pm. 3 and pm. 4 are developed, but the germs of these 

 teeth do not seem to have been calcified. Purchased, 1885, 



M. 2353 a. Fragment of the left ramus of the mandible of a slightly 

 older individual ; from Caylux. The last two milk-molars 

 are in use, and the germs of pm. 2 and pm. 3 are seen in 

 alveolo. Purchased, 1885. 



Hysenodon vulpinus (pt. i. p. 28). 



M. 2352. Three fragments of mandibular rami of young individuals ; 

 from the Phosphorites of Caylux (Tarn-et-Garonne), 

 France. The least imperfect of the three specimens shows 

 mmr4 and m. 1 in use, and the germs of pm. 3 and m. 2 in 

 alveolo. Purchased, 1885. 



Specifically undetermined. 



M. 2352 a. Small fragment of the right ramus of the mandible of a 

 young individual of a species larger than H. leptorhynchus ; 

 from the Phosphorites of Caylux (Tarn-et-Garonne), 

 France. The second milk-molar is in use, while the 

 germs of the canine, pm. 1, and pm. 2 are seen in alveolo ; 

 pm. 1 is unusually late in appearing. Purchased, 1885. 



Genus PTERODON ' (pt. i. p. 33). 



Pterodon dasyuroides (pt. i. p. 33). 



M. 2354. Fragment of the left maxilla, showing pm. 4 , m. 1 , and 



^ In reference to the observation in pt. i. p. 35, it should be mentioned that 

 Oxycena differs from Pterodon by its elongated mandibular symphysis, which 

 is a good generic character. 



