NEW FOSSIL REPTILES. 875 



Thougli the crowns of the molai-s resemble considerably those 

 of the Triconodont mammals there is the marked difference that 

 in I^ythoscourus there is no trace of a cingulum, and there is 

 apparently only a simple root to each tooth. 



Addendum (29th July, 1912). — Since the above paper was 

 read evidence has been obtained which shows that the genus 

 Endothiodon must be subdivided. Seeley twenty years ago 

 placed E tidothiodon uniseries in a distinct genus, Esoterodon, and 

 until quite recently I have followed him in this. A fragmentary 

 maxilla recently found by Mr. Whaits shows that Seeley was 

 correct. In Endothiodon bathystoma the teeth have long pointed 

 crovviis with coarse serrations both in front and behind. In 

 Endothiodon uniseries the teeth have flattened crowns serrated 

 only behind, and in E ndothiodon platyoeps there are no serrations 

 on either side. This latter pouit has been confirmed in a seconrl 

 specimen. Until the crowns of the teeth of Endothiodon lohaitsi 

 are known we may provisionally place it with Endothiodon uni- 

 series. The group would thus be formed of 



Endothiodon hathystoma Owen. 

 Esoterodon uniseries Owen. 

 Esoterodon ivhaitsi Broom. 

 Emydochampsa platyceps Broom, gen. nov. 



EXPLANATION OP THE PLATES. 



PlATE XC. 



Pig. 1. Side view of snout of Taurops macrodon Broom. Nearly \ uat. size. 



fig. 2, Side view of tootli of probably JEccasaurus prisons Bi-oom. Nat. size. 

 This tootli, though not associated with the tj'pe of ISccasaurus priscus, 

 is from the same horizon, and as it is the tooth of a Dinocephalian of 

 the size of Eccasaurus it very probably belongs to this genus and species. 



Fig. 3. Upper view of tooth of probably Eccasaums priscus Broom. Nat. size. 



Fig. 4. Side view of skull of Scymnognathus lohaitsi Broom. A little over ^ nat. 

 size. The skull is much flattened and distorted by crushing. 



rig. 5. Lower jaw of Sci/mnoffnatJizis whaitsi Broom, g^ nat. size. Though this 

 jaw is rather smaller than that of the type specimen it almost certainly 

 belongs to this species. It may have belonged to a young animal or to a 

 female. The specimen is considerably crushed. 



PLA.TE XCL 



Fig. 6. Side view of the skull of Galeops whaitsi Broom. Nat. size. The 

 specimen is slightlj^ crushed and considerably Vi^eathered. The orbital 

 margins and the preorbital portion of tlie skull and the lower jaw are the 

 outer surface of the bones viewed from within. The back portion of the 

 skull shows the quadrate a\id parts of the squamosal and opisthotic. A 

 sclerotic plate is seen in the orbit. 



Fig. 7. Side view of snout of yUlurosaurus striatidens Broom. Nat. size. The 

 specimen is considerably crushed. 



Fig. 8. ^'idie x'le'Vf oi snout oi Pristerognathus platyrhinus^Tooxa. ^'j nat. size. 



Fig. 9. Under view of snout and lower jaw of Alopecorhinus parmdens Broom. 

 \^ nat. size. 



Fig. 10. Upper view of imperfect skull of Ictidognathus 7tembii7-i/i Broom. 

 Nat. size. 



Fig. 11. Under view of snout of Ictidognathus hemburyi Broom. Nat. size. 



