18 MR. W. TIIEOBAXD, JUN., ON THE 



Colour fleshy grey ; eacli of the costal shields with a central 

 black tubercle ; beneath bright reddish-orange, with a little black 

 about the sutures. Head dark-mottled, Avitli a black-edged yellow 

 stripe behind the eye. Iris pale yellow. This species is rare in 

 Pegu, and seems confined to the streams in the hills east of 

 Tonghu, falling into the Sittang and Salwin. I have only received 

 two young specimens, both from this quarter, through the kindness 

 respectively of Lt.-Col. Phayre (the Chief Commissioner of the 

 Province) and Captain Harrison, Deputy Commissioner of 

 Shuighin, from the living one of which the above description was 

 taken. 



Pauiily TllIONYCIDiE. 



Emtda, Gray. 



E. GRANOSA, Schcipf 



This species is pretty common in Pegu and Tenasscrim, breed- 

 ing in Pegu in December. 



TiuoNYX, Geoffroy. 



T. GANQETICUS, CuV. 



Common in Pegu. 



T. Thatkei, Theobald. 



Capite typico, faciali forma forsan rotundiore. Sterni sculptura 

 modica, sive reticulationibus minoribus quam in T. yanr/eiico. 

 Sculptura ad latus regulariter reticulata, sed vertebrali regione 

 post secundas costas parum dilatata sive incrassata. Thorace 

 valde cartilagiueo, vix ullis (prseter ad latus) tuberculis osseis 

 annate. Colore supra olivaceo, lineis fuscis eleganter mar- 

 morato, subter flavesccnte pallido. 



Hahitat in llumiuibus montium Arakanensium, propc Bassein. 



Trionyx javaniciis, ornatus, and suhplatms, doubtless occur in 

 the province ; but I have not personally examined specimens. 



This is a somewhat aberrant species in some respects, and was 

 at first confounded by me witli Chitra indica, of Giinther's Mono- 

 graph, from the precise resemblance which the marbling of the 

 upper part bore to that figure. Since, however, examining the 

 specimens in the British Museum, I find that the animals are very 

 different. The true Chitra of Gray (Proceedings Zool. Soc. Peb. 



