2CA Scientific Intelligence. 



to entomologists but as well to all paleontologists. The first 

 insects found fossil occur at the base of the Pennsylvanian or 

 Lower Coal Measures. Of Paleozoic forms there are 884 species,. 

 Mesozoic 965 and of Cenozoic 5802. Rather a small showing 

 when compared with the 380,000 known recent species, and yet a 

 number sufficiently large to give a clear insight into the chrono- 

 genesis of the winged insects. 



In Chapter VII a review is given of the more important classi- 

 fications of recent insects beginning with that of Aristotle 300 

 years before Christ. In the eighth chapter the author establishes 

 a new classification based on the principles of phylogeny and 

 chronogenesis. There are two classes of insects, the winged or 

 Pterygogonea, and the wingless or Apterygogonea. The former 

 is here divided into 12 subclasses and 39 orders. The oldest sub- 

 class, restricted to the Pennsylvanian, is the radical stock Palse- 

 odictyoptera and out of it are derived 11 primary orders, all but 

 one of these being restricted to the Paleozoic. The exception is 

 Blattoidea. Either late in the Permian or in the Triassic origi- 

 nate 16 terminal orders, followed by 3 in the Jurassic, 7 in the 

 Cretaceous and 2 in the Cenozoic. 



The phylogeny of the Arthropoda is discussed on pages 1293— 

 1318. The Trilobita is regarded as the radical from which most 

 of the Arthropoda phyla? are directly derived. Finally, on pages 

 1318-1344, the author presents his "descendance conclusions."" 

 A Nobel prize might well be the reward for the energy and 

 insight here displayed. c. s. 



2. Connecticut Geological and Natural History Survey. Third 

 Biennial Report ; Bulletin No. 12, 1907-1908. William North 

 Rice, Director. 30 pages. Hartford. — The report of the Survey 

 shows an unusual amount of high grade work accomplished with 

 a very small annual appropriation. In- addition to the eleven 

 bulletins already published, the following have been accepted : 

 The Lithology of Connecticut ; the Flowering Plants and Pteri- 

 dophytes of Connecticut ; the Hymeniales of Connecticut ; the 

 Triassic Fishes of Connecticut ; the Insects of Connecticut. The 

 work in progress includes researches in glacial geology, study of 

 peat deposits, and the preparation of reports on fresh waters, pro- 

 tozoa and algae, echinodermata, and birds of Connecticut. 



H. E. G. 



3. Mississippi State Geological Survey. Albert F. Crider, 

 Director. Bulletin No. 1, Cement and Portland Cement Mate- 

 rials of Mississippi. 70 pp., 6 pis. Bulletin No. 2, Clays of Mis- 

 sissippi, pt. 1, pp. 249, pis. 42, figs. 14. Bulletin No. 3, The 

 Lignite of Mississippi, pp. 66. Bulletin 4, Clays of Mississippi, 

 pt. ii, pp. 64, pis. 17. — The Mississippi survey is justifying its 

 existence from an economic standpoint by giving its first atten- 

 tion to the resources of the state, as shown by the above titles. 

 Bound with each bulletin is a copy of the new Geologic and 

 Topographic Map, which " represents the present knowledge of 

 geologic boundaries of Mississippi " — a publication which will be 

 welcomed by geological students. h. e. g. 



