8 Echin. 
V. Echinoderma. 
[1921] 
121d— Stefanini, G. Fossili del 
Neogene Veneto. Parte seconda. 
Brachiopoda — Echinodermata. Palae- 
ontogr. Italica Pisa 25 1919 pp. 127- 
171 2 pis. 
122. — Swinnerton, H. H. The use 
of graphs in palaeontology. Geol. 
Mag. London 68 1921 pp. 357-364 
397-408. 
123. — Thomas, A. O. A Herpelo - 
crinus from the Silurian of Iowa. 
Proc. Iowa Acad. Sci. Des Moines 26 
1919 pp. 481-483. 
124. — Thomas, A. 0. The Independ- 
ence Shale near Brandon, Iowa. Proc. 
Iowa Acad. Sci. Des Moines 26 1919 
pp. 485-491. 
125. — -Trauth, F. Das Eozanvor- 
kommen bei Radstadt im Pongau und 
seine Beziehungen zu den gleiehal- 
terigen Ablagerungen bei Kirchberg 
am Wechsel und Wimpassing am 
Leithagebirge. Denksohr. Ak. Wiss. 
Wien 95 1918 pp. 171-278 pis. i-v. 
126. — Ulrich, E. 0. and Kirk, E. 
Amecystis a new genus of Ordovician 
Cystidea. Proc. Biol. Soc. Washington 
34 1921 pp. 147-148. 
127. — Vaughan, T. W. The Reef- 
Coral fauna of Carrizo Creek, Imperial 
County, California and its significance. 
Prof. Paprs. U.S. geol. Surv. 98-t 1916 
pp. 355-395 pis. xoiv-cii. 
Vedel, L. vide Brun, P. de. 
128. — Vilaseca, S. Contribucio la 
estudi dels terrenys triksics de la 
Provlnoia de Tarragona. Pub. Junta 
Ci. Nat. Barcelona 8 1920 pp. 1-66. 
129. — Waddington, H. J. Marine 
Fauna. Invertebrata. Nat. Hist, 
of Bournemouth and District. Bourne- 
mouth Natural Science Soc. 1914 pp. 
213-230 [Echinoderma at p. 218]. 
130. — Weller, S. The geology of 
Hardin County. Part vi. Paleontology. 
Bull. Geol. Surv. Illinois Urbana 41 
1920 pp. 313-377 pis. iv-xi. 
131. — Weller, S. The Chester series 
in Illinois. J. Geol. Chicago 111. 28 
1920 pp. 281-303. 
Wheeler, W. C. vide Clark, F. W. 
132. — Wichmann, R. Contribucidn 
a la geologia de la region comprendida 
entre el Rio Negro y Arroyo Valcheta. 
An. Min. Agric. etc. Buenos Aires 13 
No. 4 1919 pp. 9-45 pis. i-vii. 
132 a. — Wilhelmi, H. Ein Beitrag 
zur Theorie der Organischen Symmetric. 
Aroh. EntwMech. Leipzig 46 1920 
pp. 210-258 26 figs. 
133. — Winton, W. M. and Adkins, 
W. S. The geology of Tarrant County. 
Bull. Texas Univ. Austin Texas No. 
1931 1919 pp. 1-123 pis. i-vi. 
Winton, W. M. vide Adkins, W. S. 
II.— SUBJECT INDEX. 
N.B. — The number in Clarendon Type 
quoted after the author's name , in 
the Subject and Systematic Indices , 
refers to “ Titles ” where a fuller 
reference will be found. 
GENERAL. 
Historical. — Fossa-Mancini, 52. 
General Treatises and Monographs. 
— Clark, 19 & 30. 
Bibliography. — Bouvier, 14. 
Pedagogy. — Bush, 16. 
Museums. — Fossa-Mancim, 52a ; 
Harris, 63 ; Maluquer, 88. 
Technique. — Koehler, 74 ; Saint - 
Perier, 112 ; Swinnerton, 122. 
Nomenclature. — Mortensen, 94. 
Economics. — Hinard & Fillon, 69. 
STRUCTURE. 
General Accounts. — Clark, 19, 22 & 
31 ; Thomas, 123. 
Symmetries. — Clark, 19; Wilhelmi, 
132a. 
Skeletal anatomy. — Clark, 19 ; 
Ohshima, 99. 
Hydrocoel, Respiratory organs, etc. — 
Clark, 22. 
