MATTHEW, NEW SIRENIAN FROM PORTO RICO 



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Fig. 1. — 1 Halltheriitm uiitilleiise, lon-er jaw, left ramus, type specimen, one-half natural 



size 



External view, sympliyseal region missing. Tertiary shales near Juana Diaz, Porto 

 Rico, found by C. A. Reeds, 1915. 



Description" of Species 

 ? llalitlierium antillense sp. nov. 



Type: a lower jaw lacking sympliyseal region and anterior teeth; the 

 molars damaged on inner side; a middle cervical and the first dorsal 

 vertebra associated, neither complete. 



Type locality: Shale bkiff, west bank Jacagnas Eiver, 1 km. north, 1 

 km. Avest of Juana Diaz, Porto Rico. 



Horizon: Tertiary calcareous shales of uncertain age. 



Collector: Chester A. Reeds, N. Y. Academy of Sciences-Porto Rico 

 Surve}^, July 1, 1915. 



Diagnosis. — Size and proportions of jaw in accord with H. schinzi, pre- 

 molars more reduced, the third (fourth of Lepsius) having but one root 



