Dr. J. E. Gray on the Mud-Tortoises of India. 331 



disk without tlie odd bone, and the sternal disk with two 

 narrow Lateral callosities. From Java. Though it is without 

 its head, I have no doubt that this is the Aspilus cariniferus 

 of my Catalogue, which has the odd bone in front of the 

 dorsal disk separate from the others, and smooth, except in 

 the adult. 



6. Trionyx coromandeh'cuSy p. 16, tab. v. fig. 1, representing 

 the dorsal disk. From Coromandel. This is a species oiEmyda ; 

 but one has no means of knowing to which species of the genus 

 it belongs. 



The two following species he had not seen : — 



7. Trionyx georgicus (i\\Q Trionyx fefoxo^VQ.r\.\\?a\t) . From 

 North America. Platypeltis ferox of my Catalogue. 



8. Trionyx euphraticus^'^. 11 {Testudo rafelit of Olivier). 

 From the Euphrates. Rafetus euphraticus of my Catalogue. 



Schweigger published his ' Prodromus Monographia^ Chelo- 

 niorum' in 1814; but the manuscript was presented to the 

 Institute before 1809, for it is quoted by Geoffroy in his essay ; 

 and it was originally printed in the ' Konigsb. Archiv fiir 

 Naturwissensch.' fasc. iii. & iv. Instead of the original name 

 given by himself [Amy da) ^ he adopts Geoffroy 's genus Tri- 

 onyx (p. 14), containing : — 



1. Trionyx ferox^ Pennant, from North America. 



2. Trionyx cegyptiaciis, Geoffr., from the Nile. 



3. Trionyx euphraticus^ Olivier (tab. 41 ) , from the Euphrates. 



4. Trionyx javanicus^ Ann. du Mus. iv. tab. 3, from Java. 

 " Boulouffe " according to Leschenault. 



5. Trionyx Brongniartiij the Trionyx carinatus^ Geoff. 

 Ann. du Mus. iv. tab. 4. 



6. Trionyx granosus^ Schoepf, Test. tab. 30, a&h. An 

 Emyda. 



7. Trionyx subplanus^ Geoffr. Dogania suhplana. 



Dr. John Wagler, in his ' Natiirl, Syst. cl. Amphibien,' 

 1830 (large folio), figures the following. 



Tab. 2. fig. I. represents, under the name oi Asindonectesjava- 

 nicus.1 a young animal, which may be the same as the Trionyx 

 javanicus of Geoftr., whose figure of the dorsal disk (tab. iii.) 

 he copies. 



Tab. 2. figs, xiii.-xx., called Aspidonectes gangeticus, are 

 copied from Cuvier's figures of tlie bones of Trionyx gangeti- 

 cus of Duvaucel. 



Tab. 2. figs. XXXIV., XXXV., Aspidonectes carinatus, are 

 copied from Geofiroy's figures of Trionyx carinatus. 



Tab. 2. tigs. XXi.-xxxiii., bones of the various parts of 

 Trionyx cor oniandelicus J Geoffroy [Testwlo granosa., Schoepf). 

 A species of Emyda. 



24* 



