292 BRITISH AVONIAN CONODONT FAUNAS 
WALLISER, O. H. 1958. Rhombocorniculum comleyense n. gen. n. sp. Paldont. Z., Berlin, 
32 : 176-180. 
1960. Zum Alter des kimgstem Diabasvulkanismus in der Lahn und Dill-Mulde. 
Fortschr. Geol. Rheinld Westf., Krefeld, 3 : 229-242. 
1964. Conodonten des Silurs. Abh. hess. Landesamt. Bodenforsch., 41 : 1-106. 
WEL cH, F. B. A. & Trotter, F. M. 1961. Geology of the country around Monmouth and 
Chepstow. Mem. geol. Surv. Gt Br., London, 164 pp. 
WETHERED, E. B. 1886. On the structure and organisms of the lower limestone shales, 
Carboniferous limestone and upper limestones of the Forest of Dean. Geol. Mag., London, 
529-540. 
1888. On Insoluble Residue obtained from the Carboniferous Limestone Series at Clifton. 
Q. Jl geol. Soc. Lond., 44 : 186-199. 
1890. On the occurrence of the genus Girvanella in oolitic rocks and remarks on oolitic 
structure. Q. Jl geol. Soc. Lond., 46 : 270-274. 
1898. The building of Clifton Rocks. Rep. Br. Ass. Advmt Sci. (Bristol), 362-363. 
WHITTARD, F. W. 1927. The stratigraphy of the Valentian rocks of Shropshire, the main 
outcrop. Q. Jl geol. Soc. Lond., 737-759. 
WINDER, C. G. 1962. Upper Devonian age of the Kettle Point Shale. Tvans. R. Soc. Can., 
Ottawa, 56 : 85-95. 
WoopLanp, A. W., ARCHER, A. A., Evans, W. B. & CaLverR, M. A. 1957. Recent boreholes 
into the Lower Coal Measures below the Gellideg—Lower Pumpquart coal horizon in South 
Wales. Bull. geol. Surv. Gt By., London, 13 : 39-60. 
YounG, J. 1880. Notes on Scottish Carboniferous Microzoa and the methods by which they 
may be collected and mounted. Tvans. Edinb. geol. Soc., 3 : 300, 302. 
1880A. On a group of fossil organisms termed conodonts. Pyroc. later Tvans. Nat. Hist. 
Soc. Glasg., 4 : 5-7, 10, 78, 79. 
Youneguist, W. L. 1945. Upper Devonian conodonts from the Independence shale (?) of 
Iowa. J. Paleont., Chicago, 19 : 355-367, pls. 54-56. 
1947. A new Upper Devonian conodont fauna from Iowa. J. Paleont., Chicago, 21 : 
95-112, pls. 24-26. 
Youneguist, W. L. & Downs, R.H. 1949. Additional conodonts from the Pennsylvanian of 
Iowa. J. Paleont., Chicago, 23 : 161-171, pls. 30, 31. 
1951. Conodonts from the Lower Mississippian Wassonville dolomite of Iowa. /. 
Paleont., Chicago, 25 : 785-7092. pl. 111. 
Youneguist, W. L., Hipparp, R. R. & Retmann, I. G. 1948. Additions to the Devonian 
conodont faunas of western New York. J. Paleont., Chicago, 22 : 48-59, pls. 14, 15. 
Youneguist, W. L. & MittER, A. K. 1948. Additional conodonts from the Sweetland Creek 
shale of Iowa. J. Paleont., Chicago, 22 : 440-450, pls. 67, 68. 
1949. Conodonts from the Late Mississippian Pella beds of south-central lowa. /. 
Paleont., Chicago, 23 : 617-622, pl. ror. 
Youneguist, W. L., Mitter, A. K. & Downs, H.R. 1950. Burlington conodonts from Iowa. 
J. Paleont., Chicago, 24 : 525-530, pl. 67. 
Younecguist, W. L. & Patterson, S. H. 1949. Conodonts from the Lower Mississippian 
Prospect Hill sandstone of Iowa. J. Paleont., Chicago, 23 : 57-73, pls. 15-17. 
Youncguist, W. L. & Peterson, R. F. 1947. Conodonts from the Sheffield formation of 
north-central Iowa. J. Paleont., Chicago, 21 : 242-253, pls. 36-38. 
ZIEGLER, W. 1958. Conodontenfeinstratigraphische Untersuchungen an der Grenze Mittel- 
devon/Oberdevon und in der Adorfstufe. Notizbl. hess. Landesamt. Bodenforsch. 
Wiesbaden., 84 : 7-77, pls. 1-12. 
1959. Conodonten aus Devon und Karbon Sudwesteuropas und Bemerkungen zur 
Bretonischen Faltung. Neues. Jb. Geol. Paldéont. Mh., Stuttgart, 289-309. 
1960. Conodonten aus dem Rheinischen Unterdevon (Gedinnium) des Remscheider 
Sattels (Rheinischen Schiefergebirges). Paldont. Z., Berlin, 34 : 169-201, pls. 13-15. 
