456 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



EXPLANATION OF TLATES. 



Plate 34 (about i natural size). 



Fig, 1. Skin of Gymnura gymnura minor, adult female, Cat. No. 86784, U.S.N.M., 

 Trons. Lower Siain, 2.000 feet altitude, collected by Dr. W. L. Abbott. 



2. Skin of Ginnnura nlha, adult female, Cat. No. 14558.5, U.S.N.M., Sempang 



River, western P»orneo, collected by Dr. W. L. Abbott. 



3. Skin of Gymnura (jymnura gymnurn, adult male. Cat. No. 144173, 



tT.S.N.M.. Little Siak liiver, east coast of Sumatra, collected by Dr. 

 W. L. Abbott. 



Plate 35 (3 natural size, dorsal, lateral, and ventral views of skulls). 



Fig. 1. Gymnura gymnura minor, Cat. No. SG783, U.S.N.M. Type, Trong, Lower 

 Siaui. 



2. Gymnura gymnura gymnura. Cat. No. 144171, U.S.N.M., Little Siak River, 



Sumatra. 



3. Gymnura aJha, Cat. No. 1455S4, U.S.N.M., Sempang River, western 



Borneo. 



Plate .'>(» (twice natural size). 



Skulls of IlyJomyft suiJIufi (Miiller and Schle^'el), Cat. No. 124229, U.S.N.M., 

 Tenasserim, Dr. W. Ij. Abbott, collector, and I'odogymnura iruci Mearns, 

 Type, Cat. No. 1252S(), Ii.S.N.M., Mount Apo, Mindinao, Philippine Islands, 

 Dr. E. A. Mearns, V. S. A., collector. 



Fig. 1. Eight mandibular ramus of IlylnmyK. 



2. Right mandibular ramus of J'odogymnura. 



3. Dorsal view of mandibular teeth of IlyJomys. 



4. Dorsal view of mandibular teeth of I'odogymnura. 



5. Palatal view of part of skull of Ifylomys. 



6. Palatal view of part of skull of I'odogymnura. 



7. Lateral view of facial portion of skull of I'odogymnura. 



8. Lateral view of facial portion of skull of llylomys. 



Plate .■>7 (about 7' natural size). 



Fig. 1. External appearance of Podogymnura iruci Mearns. Type, Cat. No. 

 ]2.52.S(i, U.S.N.M., Mount Ajk), Mindanao. I'hilippine Islands. 

 2. External appearance of IlyJomys nuillus d.orf<aJi>t Thomas. Topotyi)e, 

 Cat. No. 12432S, U.S.N.M., JMonnt Kinabaln, P.ritish North Borneo. 



