Geology, 57 



J. A. Cushnian writes on the Foraminifera from the deep wells of 

 the state (pp. 33-70). The most extensive paper is by Roland M. 

 Harper on "The geography of central Florida" (pp. 71-307). 



c. s. 



2. The Fossil Crinoid Genus Dolatocrinus and its Allies; by 

 Frank Springer. U. S. Nat. Mus., Bull. 115, 78 pp., 16 pis., 6 

 text figs., 1921. — This is a detailed morphologic and taxonomic 

 study of a common and very variable group of essentially Middle 

 Devonian crinoids. In 6 genera, 2 of them new, there are recog- 

 nized 41 species (7 new), and about as many more formerly 

 described forms are thrown into synonymy. The specific char- 

 acters, reliable in the Onondaga, become nearly worthless in the 

 Hamilton, where a "rampant growth" takes place, and the genus 

 Dolatocrinus dies out. c. s. 



3. A Contribution to the Description of the Fauna of the 

 Trenton Group; by P. E. Raymond. Canada, Geological Sur- 

 vey, Mus. Bull. No. 31, 64 pp., 11 pis., 1921.— The author here 

 revises the terminology of the subdivisions of the Trenton group 

 of the Ordovician system for Ontario, Quebec, and New York, 

 and describes 11 species of Cystoidea (1 new), 16 of Brachiopoda 

 (8 new), 3 of Gastropoda (1 new), and 12 of Trilobita (2 new). 



c. s. 



4. The Genesee Conodonts, with Descriptions of New Species; 

 by William L. Bryant. Bull. Buffalo Soc. Nat. Sci., vol. 13, No. 

 2, 59 pp., 16 pis., 7 text figs., 1921. — In this interesting paper are 

 described 37 species (19 new) of conodont teeth derived in the 

 main from the basal layer, a few inches in thickness, of the 

 Genesee formation, at the base of the Upper Devonian. This 

 basal layer is a part of the Styliola limestone, and together they 

 have ' ' a maximum thickness of more than two feet. ' ' By some 

 this limestone has been thought to be "a typical pteropod ooze ' ' 

 but the author now shows it to have been formed within the 

 depth of active wave action. He says that the basal layer is 

 ''the remains of an ancient sand bar," evidently, however, one 

 formed within a very shallow sea. In regard to the animals 

 whose remains are here described, he does not believe that cono- 

 donts are the teeth of annelids, but rather that they belong to 

 ' ' some primitive type of fishes. ' ' c. s. 



5. The Trigonice from the Pacific Coast of North America; by 

 Earl L. Packard. Univ. Oregon Pub., vol. 1, No. 9, 59 pp., 11 

 pis., 1921. — The author has studied all of the Pacific Coast 

 Trigonias found in the Jurassic and Cretaceous formations. 

 These bivalves have always interested stratigraphers because of 

 their significance in Historical Geology. There are 29 recogniza- 

 ble forms (11 here newly described) along the west coast of 

 North America, and these are arranged in 7 groups based on the 

 character of the ornamentation. c. s. 



