376 



SCIENCE. 



[N. S. Vol. XIV. No. 349 , 



24. Mr. H. L. Eietz : ' Ou primitive groups of odcl 

 composite order.' 



25. Miss I. M. Schottenfels : ' On the non-iso- 

 morphism of two simple groups of order 8!/2. ' 



26. Peofessor L. W. Dowling : ' On the genera- 

 tion of plane curves, of any order higher than four, 

 with four double points. ' 



27. Professor L. E. Dickson : ' The configura- 

 tion of the 27 lines on a cubic surface and the 28 bi- 

 tangents to a quartic curve.' 



28. Professor E. H. Moore : ' Concerning the 

 second mean value theorem of the integral calculus.' 



29. Dr. I. E. Kabinovitsch : ' The application of 

 circulants to the solution of algebraic equations.' 



30. M. Ebiile Lemoine : ' Note sur la construction 

 approchee de tt de Mr. George Peirce. ' 



31. Dr. C. W. McG. Black : 



32. Professor Alexander Pell : ' Some remarks 

 on surfaces where first and second fundamental forms 

 are the second and first respectively of another sur- 

 face.' 



At the Colloquium, which was attended by 

 twenty-three persons, two courses of four 

 lectures each were presented : 



Professor Oskar Bolza : ' The simplest types 

 of problems in the calculus of variations.' 



Professor E. W. Brown : ' Modern methods of 

 treating dynamical problems, and in particular the 

 problem of three bodies. 



It is hoped that these lectures may be pub- 

 lished in complete form. A summary of them 

 will appear in the Bulletin. 



The next meeting of the Society will be held 

 in New York, on Saturday, October 26. 



F. N. Cole, 

 Secretary. 



PALEONTOLOGICAL NOTES. 

 VERTEBRATES FROM THE TRIAS OF ARIZONA. 



As recently noted in Science, Mr. Barnum 

 Brown was engaged during May and June of 

 this year in making collections for the U. S. 

 National Museum from the Trias of Arizona. 

 The exploration was undertaken in the hope of 

 obtaining ancestral forms of the Stegosaurs, and 

 while unfortunately this hope was not realized 

 much interesting material was obtained, al- 

 though, like most Triassic specimens, in a very 

 fragmentary condition. A large share of this 

 represents the large Belodont from the Trias of 

 Utah, described by the writer under the name 

 of Heterodontosuchus ganei, and comprises frag- 



ments of the skull, numerous dermal plates, 

 many vertebrae, all badly broken, and portions 

 of the pelvis and limbs, besides an absolutely 

 complete humerus, ulna and scapula. That 

 this last bone should have escaped destruction, 

 while others far more solid were shattered and 

 scattered beyond redemption, is one of the 

 many puzzling facts that come under the notice 

 of paleontologists. Associated with the Belo- 

 dont are some bones of a Dinosaur, and as a 

 few teeth referable to the genus Palseoctonus of 

 Cope are present they also probably belong to 

 that genus. A humerus has the deltoid and 

 other muscular ridges remarkably well devel- 

 oped, indicating a reptile of the strength and 

 agility that one might expect from the owner 

 of such teeth ; it is nearly solid and smaller 

 than might have been expected from the size of 

 the teeth. 



In a bed of conglomerate Mr. Brown ob- 

 tained a number of more or less fragmentary 

 bones, which from the shape of some associated 

 scutes apparently belong to Cope's Episcopo- 

 saurus. These specimens, and the clayey ma- 

 trix containing them, are unluckily thoroughly 

 permeated with alkali, which will make their 

 preparation, or even preservation, a matter of 

 difficulty. 



Perhaps the most interesting of the speci- 

 mens are the deeply sculptured ventral plates 

 of some extremely large Labyrinthodont. The 

 interclavicle, which is complete, is 40 cm. long, 

 and, 30 cm. broad, 16 by 12 inches, about the 

 size of the corresponding bone in the European 

 Mastodonsaurus. It may be of interest to note 

 that when in Washington this spring Dr. Eber- 

 hard Fraas identified a fragment of a cranial 

 plate from the same locality as the above as be- 

 longing to this genus. 



It will be seen that all the species obtained 

 are typically Triassic, the Belodont and Masto- 

 donsaurus preeminently so. 



F. A. Lucas. 



THE APPROACHING 3IEETING OF THE 

 BRITISH ASSOCIATION. 

 The British Association — for so it is univer- 

 sally called in Great Britain without any further 

 specification, a testimony to its supremacy 

 among associations — meets at Glasgow on Sep- 



