Geology and Natural History. 73 



4. I. TTeber einige Lycopodiaceen aus der Steinkohlenforma- 

 Hon ; II. Die Graptolithen des K. Miner alogisc hen Museums in 

 Dresden / by Dr. H. B. Geinitz. — Reports K. Min. Geol. u. 

 Prse-hist. Mus. in Dresden. No. 9, pp. 1-33, with 3 plates, 1890. 

 — A large species of Halonia (H. Dittmarschi Gn.) is described 

 with notes and citations of other related forms. The second part 

 besides being an account of a special collection, contains much 

 valuable synonomy and a plate illustrating the principal species. 



5. Prodromus Faimw Mediterranean sive Descriptio Ani- 

 malhmi Maris Mediterranei incolarum, etc.; by J. V. Carus, 

 vol. ii, pars ii, pp. 278-496. Stutgart, 1890. — This portion of the 

 work finishes the Gastropoda, including the Heteropoda and 

 Pteropoda. The whole of the Cephalopoda are described, and 

 the Tunicata are carried nearly to completion. 



6. Minerals from Snake Hill, New Jersey. — E. W. Perry 

 announces that he has found the following named minerals at 

 Snake Hill, 1ST. J., within the past three years : datolite, pectolite, 

 laumontite, prehnite, apophyllite, natrolite, analcite, gmelinite, 

 stilbite, heulandite, calcite. Of these the gmelinite and pectolite 

 are in fine specimens, the former rivaling the Nova Scotia min- 

 eral. Snake Hill is an ejection of trap, surrounded by sandstone 

 forming a distinct hill about 5 miles from Bergen Hill. 



7. The Silva of North • America, by Professor C. S. Sar- 

 gent, illustrated from drawings by C. E. Faxon. — Part I of this 

 beautiful work appeared some weeks ago, being a folio of 120 

 pages, with 50 lithographic plates. The set is to be completed in 

 twelve similar volumes, and will deservedly receive a place 

 among botanical works of the very highest rank. While the care, 

 accuracy, and breadth of experience, which are manifested in the 

 descriptions, will render the Silva of great value to the profes- 

 sional botanist, the author has so skillfully avoided every unnec- 

 essary technicality of language that the text may be readily 

 understood by any intelligent though unbotanical reader. The 

 aim of the work is to give full descriptions and detailed illustra- 

 tions of all trees, native or naturalized in North America, exclu- 

 sive of Mexico. Although a number of works have been written 

 on our North American forest trees, nearly all are at present long 

 out of date, and each has been confined either to a limited area of 

 the continent, or to definite groups in the botanical system. 

 Nothing of so general a nature has yet appeared, and the present 

 work supplies a long-felt need. 



In a brief preface we learn something of the years of study 

 which Professor Sargent has devoted to preparation for this 

 gigantic undertaking. To insure greater accuracy, he has spared 

 no endeavor to see in a living state every plant described, and in 

 this has succeeded with surprisingly few exceptions. In the sys- 

 tematic arrangement of the orders and genera, Bentham and 

 Hooker's Genera Plantarum has in general been followed. In 

 the nomenclature adopted, the rules of priority have been scru- 



