458 SCIENCE PROGRESS 



Geology (xiv. pp. 1-17) by Mr. S. W. Williston, who is of opinion 

 that the remains from Wyoming described some time ago by 

 Dr. W. J. Holland are rightly referred to the European 

 Goniopholis or a nearly allied genus. Other remains from the 

 same state the author describes under the new generic designation 

 of Ccelosuchus. 



The next memoir for notice is one by Mr. J. H. McGregor, 

 published in the Memoirs of the American Museum (x. art. 2) on 

 the Phytosauria (or Belodonts) of the Trias. These reptiles 

 were classed by Prof. Huxley with the Crocodilia ; but since his 

 time the opinion has been steadily gaining ground as to their 

 right to form a separate ordinal group. According to our 

 author, it is safe to conclude that phytosaurs, crocodiles, and 

 carnivorous dinosaurs form three divergent branches, or 

 " phylae," from a common Permian, or early Triassic stock, 

 nearly allied to the tuatera {Sphenodon) with a thecodont 

 dentition and two-headed ribs. Mr. McGregor is also of 

 opinion that phytosaurs represent the nearest known relatives 

 of the ichthyosaurs, or fish-lizards — although this is a point 

 which may require further investigation before it can be 

 definitely accepted. The following classification of the group 

 is proposed : 



Parasuchia. — A. Aetosauria. — Aetosaurus. 



B. Phytosauria. — 1. Phytosaurus. 



2. Mystriosuchus. 



3. Rhytidodon. 



4. Stagonolepis. 



5. Parasuchns. 



6. Episcoposaurus. 



7. Riley a. 



8. Palceosphenia. 



Of these, Nos. 1 and 2 are continental, and Nos. 4 and 7 British, 

 No. 7 being based on two vertebrae and a humerus from the 

 Keuper of Bristol, named and described in 1902 by Dr. F. von 

 Huene. Of the rest, Nos. 3, 6, and 8 are North American, while 

 No. 5 alone is Indian. The type of No. 2 is Bclodon planirostris. 

 The list is, however, incomplete, for some time ago Dr. R. 

 Broom gave a preliminary notice of certain reptilian remains 

 from the Karoo series of the Aliwal North district, South Africa, 



