No. 8.] BIBLIOGRAPHY OF CONNECTICUT GEOLOGY. 39 



147. Hitchcock, E. 



Supplement to the ichnology of New England. 



93 pp., 20 pis., edited by C. H. Hitchcock, published by 

 Commonwealth of Massachusetts, 1865. 



In this report Z7 new species are described, and a catalogue is given 

 of the specimens in the Hitchcock Ichnological Cabinet at Amherst. 



148 Hitchcock, Edward. 



Biography. 



C. H. Hitchcock: Am. GeoL, xvi, I33-I49. 1895. 

 Lesley: Nat. Acad. Sci., Biog. Mem., i, 1 15-134, 1877. 

 Pop. Sci. I\Ion., xlvii, 689-696, 1895. 



149. Hobbs, W. H. 



Notes on some pseudomorphs from the Taconic region. 

 Am. GeoL, x, 44-48, 1892. 



Description of tremolite pseudomorphs after salite, also pseudo- 

 morphs after feldspar, found in the northwestern part of Connecticut, 

 mainly in Canaan and Norfolk townships. 



150. Hobbs, W. H. 



On the geological structure of the Mount Washington 

 mass of the Taconic range. 



Jour. Geol., i, 717-736, 4 figs., 2 pis., map and sections, 

 1893- 



Evidence that schist of this vicinity is below limestone, and structure 

 of mountain is essentially anticlinal. Schist of northern extremity is 

 above limestone; calcareous beds alternate with the schists, which have 

 been shown to possess marked lithological differences; probability of the 

 beds being Ordovician, although a portion may be Cambrian. The 

 Mount Washington series consists of four members, in order of age 

 as follows: 1. Canaan dolomite; 2. Riga schist; 3. Egremont lime- 

 stone; 4. Everett schist. Striking lithological distinctions separate the 

 two schist horizons. 



151. Hobbs, W. H. 



The geological structure of the Housatonic valley lying 

 east of Mount Washington. 



Jour. GeoL, i, 780-802, 9 figs., 3 pis., map (pi. v), 1893. 



District contains same horizons as Mount Washington. Ridges are 

 anticlinals of Riga schist produced by north-south 'compression: Area 

 marked by unsymmetrical folds.' A reversed fault (Housatonic fault) 

 has complicated the stratigraphy, and resulted in production of meta- 

 morphic minerals. 



152. Hobbs, W. H. 



Differential faults. 



Am. GeoL, xiv, 35-37, 1894. 



Discussion of a new type of fault — " differential fold fault," — and 

 description of one at the Housatonic river in Canaan. 



