274 Chronicles of Science. [April, 



saurus, Megalosaurus, Poildlopleuron, Lselaps, and probably Eus- 

 helosaurus. 



2. The Scelidosauridse, with the genera Thecodonts saurus, 

 Hylseosaurus, Pholacanthus, and Acanthopholis. (The omission 

 of Scelidosaurus is of course accidental, as the family is founded on 

 that genus.) 



3. The Igiumoclontidse, with the genera Getiosaurus, Iguanodon, 

 Hypsilophodon, Hadrosaurus, and probably Stenopelys. 



Although Gompsognaihus had many points of affinity with the 

 Dinosa/uria, as in the ornithic character of its hind limbs, yet it 

 differed from them in several important particulars. Professor 

 Huxley therefore makes a separate group for it, the Gompsognatha 

 forming, with the Dinosauria, an order, the Omithoscelida. 



After treating of the Omithoscelida in relation to other reptiles, 

 he concludes to place them in that great division of the Beptilia 

 which he calls Siichospondylia, in which the thoracic vertebras have 

 distinct capitular and tubercular processes. The Suchospondylia 

 embraces the Grocodilia, the Dicynodontia, the Pterosauria, and 

 the Omithoscelida. 



With regard to the relation of the Omithoscelida to birds, 

 Professor Huxley stated that he knew of no character by which 

 the structure of birds, as a class, differs from that of reptiles, which 

 is not foreshadowed in the Omithoscelida. 



Dr. Duncan's paper " On the Geography of Western Europe 

 during the Mesozoic and Cainozoic periods," elucidated by their 

 Coral-faunas, would seem to have been intended to create a discus- 

 sion for the purpose of bringing out the younger Agassiz, who is 

 over for a visit in Europe. Considerable misconception exists in 

 the minds of even advanced naturalists, as to the species of corals 

 peculiar to the deep sea, as contrasted with the reef, lagoon, and 

 shallow-water species. Dr. Duncan contrasted the fauna existing 

 in our seas with the extinct coral-fauna of the Secondary and Ter- 

 tiary epochs, and pointed out that a correspondence of physical 

 conditions in the deposition of certain strata was marked by the 

 presence of similar organic remains ; thus the presence of compound 

 ccenenchymal species of coral indicated reefs, and their absence in 

 places where simple or non-ccenenchymal Madreporaria are found, 

 is characteristic of deep-sea areas remote from land. 



Professor Alexander Agassiz thought the depth at which true 

 reef-building corals are said to exist would be considerably ex- 

 tended. A reef is in the course of formation at the present time 

 off the coast of Florida. 



Mr. Davidson has determined nearly forty species of Brachio- 

 poda from the pebble-bed at Budleigh-Salterton, near Exmouth, 

 Devon, and has figured them with his usual accuracy and artistic 

 skill in three beautiful plates. It is to be feared that, with certain 



