SPECHTS FERRY BRYOZOAN FAUNA 35 



Fritz, M. A., 1957, Bryozoa (mainly Trepostomata) from the Ottawa Formation 

 (middle Ordovician) of the Ottawa-St . Lawrence Lowland: Geol . Survey 

 Canada Bull. 42, 75 p., 30 pis. 



Herbert, Paul, Jr., 1949, Stratigraphy of the Decorah Formation in western Illi- 

 nois: Univ. Chicago Ph.D. thesis and Illinois Geol. Survey unpublished 

 manuscript . 



Horowitz, A. S., and Perry, T. G., 1956, Fauna of the Glen Dean Limestone 

 (middle Chester) of Indiana and northern Kentucky (abstract): Geol. Soc. 

 America Bull . , v. 67, p. 1707-1708. 



Kay, G. M., 1928, Divisions of the Decorah Formation [in northeastern Iowa]: 

 Science, new ser., v. 67, p. 16. 



Kay, G. M., 1929, Stratigraphy of the Decorah Formation: Jour. Geol., v. 37, 

 p. 639-671. 



Kay, G. M., 1931, Stratigraphy of the Ordovician Hounsfield metabentonite: Jour. 

 Geol., v. 39, p. 361-376. 



Kay, G. M., 1934, Mohawkian Ostracoda: Species common to Trenton faunules 

 from the Hull and Decorah Formations: Jour. Paleontology, v. 8, no. 3, p. 

 328-343, pis. 44-46. 



Kay, G. M., 1935, Ordovician System in the upper Mississippi Valley: Kansas 

 Geol. Soc. 9th Ann. Field Conf. Guidebook, p. 281-295. 



Kay, G. M., 1940, Ordovician Mohawkian Ostracoda: Lower Trenton Decorah 

 fauna: Jour. Paleontology, v. 14, no. 3, p. 234-269, pis. 29-34. 



Kay, G. M., and Atwater, G. I., 1935, Basal relations of the Galena Dolomite 

 in the upper Mississippi Valley lead and zinc district: Am. Jour. Sci . , v. 29, 

 5th ser., p. 98-111. 



Loeblich, A. R. , Jr., 1942, Bryozoa from the Ordovician Bromide Formation, Okla- 

 homa: Jour. Paleontology, v. 16, no. 4, p. 413-436, pis. 61-64. 



Nicholson, H. A., 1879, Paleozoic tabulate corals: 342 p., 15 pis., William 

 Blackwood and Sons, Edinburgh and London. 



Sproule, J. C, 1936, A study of the Coburg Formation: Geol. Survey Canada 

 Mem. 202, pt . 3, p. 93-119, 3 pis. 



Templeton, J. S., and Willman, H. B., 1952, Guidebook for the 16th Tri-State 

 Geol. Soc. Ann. Field Conf., Illinois Geol. Survey, 47 p. 



Troedsson, G. T., 1928, On the middle and upper Ordovician faunas of northern 

 Greenland, Pt. II: Meddelser om Gronland, v. 72, pt. I, 197 p., 56 pis. 



Twenhofel, W. H., et al . , 1954, Correlation of the Ordovician formations of 

 North America: Geol. Soc. America Bull . , v. 65, p. 247-298. 



Ulrich, E. O., 1886, Report on the lower Silurian Bryozoa with preliminary de- 

 scriptions of some of the new species: Minnesota Geol. and Nat. Hist. 

 Survey 14th Ann. Rept., p. 55-103. 



Ulrich, E. O., 1895, On the lower Silurian Bryozoa of Minnesota: Minnesota 

 Geol. and Nat. Hist. Survey, v. 3, pt. 1, p. 96-332, 28 pis. 



