NEW FOSSIL REPTILES. 



875 



Though the crowns of the molars resemble considerably those 

 of the Triconodont mammals there is the marked difference that 

 in I^'ijthosawus 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 

 Jindothiodon mast be subdivided. Seeley twenty years ago 

 placed Eiidothiodon ^miseries 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 Eiidothiodon bathystoma the teeth have long pointed 

 crowns with coarse serrations both in front and behind. In 

 Eiidothiodon uniseries the teeth have flattened crowns serrated 

 only behind, and in Eiidothiodon -platijceps there are no serrations 

 on either side. This latter pohit has been confirmed in a secoml 

 specimen. Until the crowns of the teeth of Eiidothiodon lohaitsi 

 are known we may provisionally place it with Eiidothiodon uni- 

 series. The group would thus be formed of 



Eiidothiodon hathystoma Owen. 



'^Esoterodon uniseries Owen. 



Esoterodon lohaitsi Broom. 



Emydochain'psa platyceps Broom, gen. nov. 



EXPLANATION OF THE PLATES. 

 PiATB XC. 



Pig. 1. Side view of snout of Taiirops macrodon Broom. Nearly i iiat. size. 



Fig'. 2. Side view of tooth of probably Hccasauriis priscus Broom. Nat. size. 

 This tooth, though not associated with the type of JSccasaurus priscus, 

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

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



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



Pi^, 4. Side view of skull of Sctim)u\qiiathus lohctitsi Broom. A little over ^ nat. 

 size. The skull is much tliitteiied and distorted by crushing.^ 



Fig. 5. Lower jaw of Sciimiiognathns lohaitsi Broom. ;^ 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.TB XCL 



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

 specimen is slightly crushed and considerably weathered. The orbital 

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

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

 skull shows the quadrate and parts of the squamosal and opisthotic. A 

 sclerotic plate is seen in the orbit. 

 Fig. 7. Side view of snout of ^lurosaurus striatiiens Broom. Nat. size. The 

 specimen is considerably crushed. 



Side view of snout of Pristerognathus jalatyrliinws Broom, -j';, nat. size. 



Under view of snout and lower jaw of Alopecorhinus parvideiis Broom. 

 I J nat. size. 



Upper view of imperfect skull of Ictidognathus liembwyi Broom. 



Under view of snout of Ictidognathus hemhuryi Broom. Nat. size. 



Fig. 

 Fig. 



8. 

 9. 



Fig. 



10. 



Fig. 



XL 



