November 22, 1895.] 



SCIENCE. 



701 



strata were well jointed, and at a time when 

 the stratification planes were the leading lines 

 of weakness. The dikes connected with the 

 sills have irregular contact planes. The later 

 dikes which cut the sills follow master joints. 

 There is reason, in this field at least, for sup- 

 posing that intrusion in the form of sheets took 

 place, because the rock yielded more readily in 

 a horizontal direction along the bedding planes 

 than it did along .vertical lines. But there is 

 little in the mode of occurrence, or in the scale 

 of these intrusions or the elevation of the strata 

 above them, to afford a full comparison with 

 the typical laccolites of the .West. 

 - In the review of the literature of laccolitic in- 

 trusions, an early account of a quaquaversal 

 hill covering, a domeshaped mass of trap in 

 Derbyshire, England, seems to have been over- 

 looked. The account and a cross-section will 

 be found in Bakewell's Introduction to Geology, 

 2d Am. ed.. New Haven, 1833, pp. 95-97. 



j. b. woodwoeth. 

 Habvaed Univeesity. 



Bibliography of North American Paleontology 

 1888-1892. By Charles Eollin Keyes. 

 • Bull. U. S. G. S., No. 121. 251 pp. Wash- 

 ington. 1894. 



This publication will be received with wel- 

 come by paleontologists. Each separate paper 

 appears under several subject headings, bio- 

 logic, stratigraphic or geographic, so that the 

 cross references make the list as good a substi- 

 tute for a card catalogue as a printed list can 

 be. 



Several criticisms can, however, be made, for 

 a close examination shows the work to be full 

 of imperfections. Firstly, the compilation was 

 carelessly done. This is evidenced in the care- 

 less copying of titles as well as in the omission 

 from the list of nearly 150 papers published 

 during 1888-1892, which is one sixth of the 

 total number of papers appearing in the list un- 

 der the authors' names. In many cases the 

 titles are not given in full (as it is claimed they 

 are in the introduction, p. 7). 



Examples of such wrong copying are: 

 P. 229, second entry should be — Vodges, A. 

 W. A Bibliography of Paleozoic Crustacea 

 from 1698 to 1889, including a list of North 



American species and a systematic arrangement 

 of genera. 



P. 70, seventh entry includes two separate 

 papers by separate authors. They are — Dawson , 

 J. William. Preliminary note on new species 

 of sponges from the Quebec Group at Little 

 Metis (Can. Eec. Sci. Ill, 49-59, figs. April, 

 1888). Hinde, George Jennings. Notes on 

 sponges from the Quebec Group at Metis, and 

 from the Utica Shale (Can. Eec. Sci. iii, 59-68. 

 April, 1888). 



P. 183, second entry should be — Ringueberg, 

 Eugene N. S. The Crinoidea of the Lower 

 Niagara Limestone at Lockport, N. Y., with 

 new species. 



P. 190, third entry should be — Shaler, N. S. 

 The Geology of the Cambrian District of Bristol 

 county, Mass. 



P. 108— Hollick, Alfred, should be— Hollick, 

 Arthur. 



P. 73, fourth entry should be — Hamilton, 

 Chenango and Otsego counties, New York. 



P. 73, third entry. ' Geology of Skunne- 

 munk Mountain, Osage county, N. Y.,' should 

 be ; Geology of Skunnemunk Mountain, Orange 

 county, N. Y. This title together and several 

 others, though appearing under certain of the 

 subject headings, are not entered under their 

 author's names. 



Pp. 21, 86, 198, 226. — ' Bison latiformis' 

 should be Bison latifi-ous. 



Pp. 30, 39, 42, 71.— The generic term Clyme- 

 nia (a Cephalopod) appears as ' Calymene' (a 

 Trilobite). 



The proof reading is very bad, surprisingly so 

 in a publication issued by the United States 

 Geological Survey. The proof was read evi- 

 dently by a person having no knowledge what- 

 ever of paleontological terms, for a large number 

 of generic and specific names are incorrectly 

 spelled. Some of the most unpardonable mis- 

 takes are 'Necomian,' 'Cheyene,' 'Ciasaurus,' 

 'Paneka,' ' Ceatopsidse, ' ' Foraminiferial,' etc. 



P. 76, twelfth entry, ' Magia' probably means 

 Niagara. The spelling in the species lists under 

 titles of Matthew, G. F. , is particularly bad. 

 , The value of the publication would be greatly 

 increased were the subject-matter printed on 

 one side of each sheet only. This arrangement 

 would enable the working paleontologist to 



