Miscellaneous Intelligence. 87 



men of Anchismirus colurus Marsh is treated at length, the others 

 more briefly. Anchisaicrus sohcs Marsh is doubtfully referred to 

 that genus. Ammosaurus major Marsh completes the list of the 

 types preserved at Yale, while Megadactylus polyzelus Hitchcock, 

 which Marsh finally referred to Anchisaurus, v. Huene places in 

 the European genus Thecodontosaurus, the fourth genus to which 

 this interesting type has been referred. 



The remaining American species are Coelophysis longicollis 

 Cope, G. bauri Cope, and C. Willistoni Cope, all of which come 

 from Mexico. The remaining species discussed are confined to 

 South Africa and Australia. 



An interesting feature of the final summary is the placing of 

 Ammosaurus among the plant-feeding Orthopoda (Predentata), 

 the first Triassic dinosaurian, known from the skeleton, to be 

 referred to that suborder. The presence of predentates during 

 Triassic times, however, has already been proven from the foot' 

 prints. r. s. L. 



12. Diamonds in garnet-pyroxene nodtdes in Kimberlite. — 

 The Roberts Victor Diamond Mine at Boshof, Orange River 

 Colony, was opened in 1905. Since then numerous nodular 

 masses, consisting of garnet and an emerald-green pyroxene with 

 cyanite, have been frequently found in the " yellow ground." 

 The interesting observation is now recorded by G. S. Corstor- 

 phine that one of these nodules has been found to contain eight 

 diamonds, one or two of them well-formed octahedrons of \ to -|- 

 carat. The origin of these eclogite bowlders, as they have been 

 called, has been disputed, but the author regards them as concre- 

 tionary nodules formed by segregation or differentiation in the 

 original magma, comparable with the olivine nodules observed in 

 some basalts. The presence of diamonds in these nodules supports 

 the theory that they originated in the firmer rock material called 

 the " blue ground," and have not been carried in from some foreign 

 source. Graphite is also occasionally found in the nodules, and 

 this may represent carbon which, under different conditions, 

 might have appeared as the diamond. — Trans. Geol. Soc. So. 

 Africa, x, 65, 1907. 



III. Miscellaneous Scientific Intelligence. 



1. The Microscopy of Technical Products; by Dr. T. F. 

 Hanausek, revised by the author and translated by Andrew J. 

 Winton with the collaboration o/Kate G. Barber. Pp xii, 471 

 with 276 figures. New York, 1907 (John Wiley & Sons). — The 

 preparation of a treatise of this kind presents peculiar difficulties. 

 From the nature of the case, it cannot be encyclopaedic, for in 

 these days of extreme specialization the encyclopaedia has given 

 place to exhaustive essays covering veiy limited fields. Hence 

 there has arisen in every department of applied science a demand 

 for some safe guide in technique, which shall train the observer 



