found in the Forest-bed series of the east of England. At a 



recent meeting of the Geological Society of London, Professor 

 Owen described Notochelys costata, an extinct Chelonian from 

 Blinder's river, Queensland. It is the first known Australian fos- 

 sil turtle, and is of a generalized type between the Chelydrians 

 and marine turtles. At the next meeting of the same society 

 (Feb. 8, 1882), Mr. J. W. Hulke described Iguanodon See/yifrotn a 

 bed between the clays and gravel of the cliff in Brook bay, Isle of 



Wight. Various and prolific seams of anthracite and bituminous 



coal, some of them 10 ft. or 12 ft. in thickness, have been found in 



Natal. Professor Marsh contributes to the American Journal 



of Science, an article upon the wings of Pterodactyles, with a 

 full size plate of Rhawphorhynchus flivllitrus Marsh. The speci- 

 men described was found in the lithographic states of Bavaria, 

 and shows very perfect impressions of the volant membranes ot 

 both wings, as well as of a separate, vertical rudder at thp end ot 



the long tail. The membrane was similar to that of bats. -In 



the Journal of the Cincinnati Society of Nat. History, Mr. S. 

 A. Miller describes some new species and genera of Palaeozoic 

 fossils. He also gives a well-merited criticism of Professor Nich- 

 olson's book on Monticulipora, showing the extensive ignorance 

 of its author of American writings on the subject. We per- 

 formed the same duty for the same writer's manual of Palaeontol- 

 ogy a year or two ago. 



MINERALOGY. 1 



Two new Guano Minerals.— Professor C. U. Shepard 2 has de- 

 scribed two new minerals which have originated in the guano 

 formation covering the islands of Moneta and Mona, near 

 Porto Rico, W. I., and to which he gives the names MoneW 

 and Monite. They were found lining the walls of cavities in 

 the rock guano, and, though undoubtedly formed through the 

 action of percolating waters, contain no organic matter. 



Monetite occurs in crystals having the form of rather thin 

 rhomboids, often interpenetrating each other to form complex 

 groups. Mr. E. S. Dana refers them to the triclinic system. 

 Their greatest length is between T V,th and *Vth of an inch. 



The mineral has an uneven fracture, a vitreous lustre, a pa e, 

 yellowish-white color, and is semi-transparent; hardness 3.5, 

 specific gravity about 2.75. Heated before the blow -pipe » "V 

 forceps, it turns white and melts into a globule with crystalline 

 facets. r 



It has the following composition (mean of two analyses by <- 

 U. Shepard, Jr.) : 



Lime Phosphoric acid Sulphuric acid Water.^ ^ 



