BOOK NOTICES. 449 
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chert masses, some worn, as if drifted, but other beds are apparently broken in 
places, and from them some good fossils can be obtained. 
Prof. White speaks of the hitherto frequent occurrence of the Dob eenne in 
the Kinderhook and Burlington and Keokuk groups, and of the hitherto com- 
parative absence of other forms, the JLzthostrotion Mammillare ony having been 
hitherto found. 
Dr. White says ‘‘the discovery of four new forms of Wennadd corals is a 
matter of much interest, and the interest is also increased by the fact that they 
are all types which are unusual in at least American carboniferous strata.” Dr. 
White says conclusively ‘‘that such a group of corals is not without a certain 
Devonian facies.”’ 
The vertical range of these corals is small, indicating the short period of the 
age during the formation of the reef. It is certainly a well marked horizon. 
The following is a list of ten species of corals that have been found at this 
horizon in Missouri, Iowa and Illinois, as indicated by Prof. White: Zephreutis 
calceola and Z. acuta of White and Whitfield, Z. eliptica White, Chonophyllum 
Sedaliense White, Syringapora harveyu White, Favosites (Michelinia) divergens White, 
M. expansa White, M. placenta White, Lepidopora typa Winchell, Lithostrotion 
Microstylum White. 
Plate 42 is peculiarly interesting to amateur palzontologists of Kansas City, 
for two very interesting fossils were discovered at Kansas City and are here 
figured: Pheurotomaria Broadheadu White, the largest Pleurotomaria yet de- 
scribed from the coal measures. Smaller specimens of this species have been 
obtained from Pleasant Hill, Kansas City and from Northwest Missouri, but the 
typical specimen here figured was obtained from the bluffs of Kansas City. It 
somewhat resembles P. coxanus M. and W., but is specifically very different. 
It is a handsome fossil and beautifully ornamented; its full height, eighty-eight 
millimeters; length of aperture, fifty mm.; breadth of same, forty-nine mm. ; 
full diameter of last volution, including aperture, seventy-five mm. 
Another fossil figured here is Conularia crustrela White, which has only been 
found in Missouri in a six-inch stratum at Kansas City ; specimens of it can be 
seen in most cabinets of Kansas City. I have also found it at one locality in 
Montgomery county, Ill. Prof. White speaks of this fossil also having been 
obtained by Prof. E. D. Cope, from Taos, New Mexico. It is the only species 
of Conularia at present known from the coal measures of the Mississippi valley, 
although several species have been obtained from sub-carboniferous rocks. 
Another new species of Prof. White is the Waticopsis Morilifera, a pretty © 
form from No. 72 of upper coal measures at Pleasant Hill, Mo. I have foundit 
nowhere else. G. C. BROADHEAD. 
LEE CARPENTERS’ STEEL SQUARE AND ITs USES: By Fred. D. Hodgson. In- 
dustrial Publication Company, New York, 1880, pp. 68, 12 mo., 75¢. 
This little work consists of a description of the square a its uses in 
