NEW OSTRACODERM— 0RVIG 21 



Gross, Walter 



1935. Histologische Studien am Aussenskelett fossiler Agnathen und Fische. 



Palaeontographica, vol. 83, Abt. a, 60 pp., 30 figs., 7 pis. 

 1950. Die palaontologische und stratigraphische Bedeutaug der Wirbelticr- 

 faunen des Old Reds und der marinen altpalfiozoischen Schichton. 

 Abh. Deutsch. Akad. Wiss., Math.-Naturw. Kl. Jahrg. 1949, 

 No. 1, 130 pp., 1 fig. 

 1954. Zur Conodonten-Frage. Senckeuberglana Lethaea, vol. 35, pp. 73-85, 

 2 figs., 5 pis. 

 Howell, B. F. 



1937. Cambrian Centropleura vermontensis fauna of northwestern Vermont. 

 Bull. Geol. Soc. Amer., vol. 48, No. 8, pp. 1147-1210, 6 pis. 

 James, W. Warwick 



1957. A further study of dentine. Trans. Zool, Soc. London, vol. 29, pt. 1, 

 66 pp., 4 figs., 10 pis. 

 Johnson, J. N. 



1944. Paleozoic stratigraphy of the Sawatch Range, Colorado. Bull. Geol. 

 Soc. Amer., vol. 55, No. 3, pp. 303-378, 7 figs., 11 pis. 



Kl^R, JOHAN, AND HeINTZ, AnATOL 



1935. The Downtonian and Devonian vertebrates of Spitsbergen. 5. Sub- 

 order Cyathaspida. Skrift. Svalb. Ish., No. 40, 138 pp., 57 figs., 

 40 pis. 

 Kirk, Edwin 



1930. The Harding Sandstone of Colorado. Amer. Journ. Sci., ser. 6, 

 vol. 20 (220), No. 120, pp. 456-465. 

 Kirk, S. R. 



1929. Conodonts associated with the Ordovician fish fauna of Colorado — 



a preliminary note. Amer. Journ. Sci., ser. 5, vol. 18 (218), 

 No. 108, pp. 493-496, 1 pi. 

 KvAM, Thorvald 



1946. Comparative study of the ontogenetic and phylogenetic development 



of dental enamel. Norsk Tannlaegeforenings Tidende, vol. 56, 

 suppl., 198 pp., 147 figs. 



LiNDSTROM, GUSTAF 



1895. On remains of a Cyathaspis from the Silurian strata of Gotland. 

 Svensk. Vet. Akad. Handl. Bih., vol. 2, afd. 4, No. 3, 15 pp., 2 figs., 

 2 pis. 

 McCabe, W. S. 



1954. Williston Basin Paleozoic unconformities. Bull. Amer. Assoc. Petr. 

 Geol., vol. 38, No. 9, pp. 1997-2010, 10 figs. 

 McCoy, M. R. 



1952. Ordovician sediments in the Northern Black Hills. Billings Geol. 

 Soc, Guidebook, 3d Ann. Field Conf., pp. 44-47. (Not seen, cited 

 after Denison, 1956.) 

 Miller, A. K. 



1930. The age and correlation of the Bighorn formation of northwestern 



United States. Amer. Journ. Sci., ser. 5, vol. 20 (220), No. 117, 

 pp. 195-213. 

 Miller, A. K.; Cullison, J. S.; and Youngquist, Walter 



1947. Lower Ordovician fish remains from Missouri. Amer. Journ. Sci., 



vol. 245, No. 1, pp. 31-34, 1 pi. 



