Geology and Mineralogy. 479 



hippus in abundance, but Illingoceras and other twisted-horn 

 antelopes of Asiatic affinity, which suggest for Hesperopithecus 

 or its ancestors a possible migration from the great primate cen- 

 ter of the Old World. 



Further corroborative evidence would be greatly welcomed to 

 establish beyond doubt this most unique occurrence. r. s. l. 



2. Shallow-water Foraminifera of the Tortugas Region; by 

 J. A. Cushman. Dept. Marine Biology, Carnegie Inst. Wash., 

 vol. 17, So pp., 14 pis., 1922. — An interesting description of the 

 145 forms of foraminifers found about the extreme western end 

 of the Florida Keys. There are also new observations on living 

 specimens, relating to their movements, colors, commensals, devel- 

 opment, and variation. The plates are from drawings by 

 J. Henry Blake. c. s. 



3. Fossil Echini of the West Indies; by Robert T. Jackson. 

 Stratigraphic Significance of the Species of West Indian Fossil 

 Echini; by T. "W. Vaughan. Carnegie Inst. Wash., Pub. No. 



306, 122 pp., 18 pis., 5 text figs., 1922.— In this excellent memoir, 

 Jackson treats of all the known fossil echini of the West Indies, 

 89 species. Of these 8 are Cretaceous, the remainder Cenozoic 

 from Eocene to Pliocene. Of the known forms the author 

 describes 57, and of these 16 are new; the 32 forms not seen by 

 the author are listed. There are 12 regular or endocyclic echini, 

 and the remainder are of the irregular or exocyclic type of struc- 

 ture. Vaughan describes the stratigraphic significance of the 

 group. c. s. 



4. Triassic Fishes from Spitsbergen ; by Erik A:Son Sten- 

 sio. Pt. I, Introduction, Some Remarks on the Geology of the 

 Triassic of Spitzbergen, and Descriptions of the Families Ces- 

 traeionidse, Coelacanthiche, Palaeonischidae, and Catopteridse. Pp. 



307. 35 pis., 90 text figs. Vienna (Adolf Holzhausen), 1921.— In 

 this monograph are described and illustrated in great detail 

 about 40 forms of fishes that occur in the Lower Triassic of the 

 Ice Fjord of Spitzbergen. Of elasmobranchs there are 4 genera 

 and 11 species; of Ceratodus, 1 species; of crossopterygians, 5 

 genera and 10 species ; and of actinopterygians, 8 genera and 18 

 species. There is also a detailed statement of the stratigraphy 

 of the Triassic of Spitzbergen, having a total thickness of 594 

 meters, of which 315 meters are essentially black shales, the 

 remainder mainly yellow sandstones. c. s. 



5. The Miocene of Northern Costa Rica; bv A. A. Olsson. 

 Part 1, Bull. Amer. Paleontology, Xo. 39, 168 pp., lo pis., 1922 

 (Harris Co., Ithaca, N. Y., $2.50). — A valuable report, of which 

 the first thirty-four pages are devoted to a general description 

 of the stratigraphy and correlation. The remainder contains 

 descriptions of the gastropods, of which there are 208 forms (110 

 new). - c. s. 



