274 Revieios — Dr. Anton Fiiisch — Fauna of the Gas-coal, etc. 



and converge forward. The foramen parietale is nearly in the 

 middle of the parietal suture. 



The preraaxillary carries 6 or 7 sharp teeth with furrowed points. 

 The maxillary carries 27 pointed teeth with the smallest in front. 

 The palatine process carries small denticles. There are 26 teeth in 

 the mandible. 



On the under side of the skull the parasphenoid has a rhomboidal 

 shield, and an anterior stalk marked with four longitudinal furrows, 

 and pits at its base which may indicate a group of teeth. The 

 pterygoid bone is marked with oblique fan-like grooving and may 

 have carried a few teeth. The orbital ring is formed by 7 or 8 plates. 



There are 36 vertebra in the trunk, and about the same number 

 in the tail. The caudal vertebrae are wide and short. The thoracic 

 vertebree have a short transverse process to which the ribs are 

 attached. The middle thoracic plate is relatively small, and consists 

 of a thin, fan-shaped plate, with the margin prolonged into thirty 

 rays ; the stalk is scarcely stronger than one of these rays. 



The humerus is about one and a half times as long as a vertebra, 

 which is only half its relative length in Hyloplesion. The fore arm 

 is as long as a vertebra. The carpal bones are unossified. The 

 femur is twice as long as the humerus ; and the tibia and fibula half 

 as long as the femur. 



Microbrachis mollis. — In this species the radiating furrows on the 

 cranial bones are simple and rarely dichotomous. There are 12 

 teeth in the maxillary bone. The animal was about 16 cm. long, 

 and closely resembled the foregoing species, but had the skull wider, 

 with a round snout. The teeth are stronger and less numerous. 

 There are 38 thoracic vertebrae and 20 to 25 caudal vertebrae. The 

 neural arch is at first low, but subsequently becomes more elevated 

 in the dorsal region. 



Microhracliis (?) hranchiophorus is only known from the skull, 

 which has the bones furrowed, with a parasphenoid of the Micro- 

 hracliis type, except that it appears to carry two long rows of teeth 

 on the shield, which has a distinctive emargination. The skull was as 

 wide as long. The parietal foramen is transversely wide. There 

 are 12 teeth in the maxillary, and 18 in the mandible. The pterygoid 

 carried teeth. 



All the Amphibians which have been described in this volume are 

 devoid of traces of labyrinthic structure in the teeth. The author 

 concludes that the presence of branchial arches or a parasphenoid 

 bone prove the remains to have been truly amphibian ; but they can 

 in no sense be regarded as the ancestors of living TJrodella ; and 

 their true position in classification needs further investigation. The 

 next volume will be chiefly devoted to amphibians in which the 

 teeth show a labyrinthic structure. We would express our con- 

 gratulations to the author on the completion of the first volume of 

 his arduous and admirable labours. H. G. Seeley. 



