479 



decidedly different from any I have before seen. They have some- 

 what the external appearance, both in shape and markings of the 

 head, of some specimens of Cistudo amboinensis, but belong to the 

 genus Emys, or rather Geoclemys, and not to Cistudo. 



They are referable to the first division of genus which has the back 

 of the shell three-keeled, and, like the other species of that section, 

 come from Asia. 



1. Geoclemys macrocephala. 



The shell oblong, rather depressed, entire, three-keeled, olive- 

 brown ; the keels subcontinued, nearly parallel, the middle one higher 

 and more distinct behind ; the lateral ones, near the upper edge of the 

 shields, continued, ending abruptly on the hinder edge of the third 

 lateral discal shield ; the hinder lateral and central shield only 

 marked with a slight convexity ; the margin entire, yellow-edged. 

 The under side yellow, with black triangular spots ; the sternum flat, 

 very indistinctly keeled on the side. 



Animal blackish-olive. Head large ; crown flat, covered with 

 single smooth plate, purplish-brown, with two streaks from middle 

 of the nose, the upper edging the crown, the other the upper part of 

 the beak, and with two streaks from the hinder edge of the orbit, 

 the lower short and interrupted, extended on the temple, the upper 

 broader and continued over the ear along the side of the neck ; two 

 close streaks under the nostrils to the middle of the upper jaw, and 

 two broad streaks, dilated behind, down the front of the lower jaw, 

 and continued on the edge of the lower jaw behind ; the nape and 

 hinder part of the side of the lower jaw covered with large flat scales ; 

 the rest of the neck and legs covered with minute granular scales ; 

 the front of the fore-legs covered with broad band-like scales ; the 

 toes of the fore- and hind-feet rather short and thick, covered above 

 with broad band-like scales. 



Hab. Siam. 



The front vertebral plate is quadrangular, the front edge wider, 

 rounded ; second, third, and fourth ventral shields six-sided, the 

 second longer than broad, the fourth broader than long ; the three 

 hinder sides are longest, the fifth vertebral shield subquadrangular, 

 the front sides being very narrrow, and the hinder side very broad and 

 slightly truncated. 



3. Description of some New Genera of Lithophytes, or 

 Stony Zoophytes. By Dr. John Edward Gray, F.R.S., 

 F.L.S,, V.P.Z.S., Pres. Ent.Soc, etc. 



The Corals were formerly divided into three genera, according to 

 the nature of their axes ; viz. Cor allium with continuous stony, Isis 

 with jointed stony, and Gorgonia with horny axes ; but many of the 

 corals which had stony axes were referred to the last genus. 



Lamouroux, in his work on ' Flexible Corals,' divided the genus 



