TITLES. 
Rept 9 
Harrison, R. G. An experimental study of the relation of the nervous 
system to the developing musculature in the embryo of the Frog. 
Amer. J. Anat. iii, pp. 197-220, figg. 
Harvie-Brown, J. A. & Macpherson, H. A. A Vertebrate Fauna of 
Scotland. North-west Highlands and Skye. Edinburgh, 1904, 8vo, 
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Hay, 0. P. On two species of Turtles from the Judith River Beds of 
Montana. Ann. Carnegie Mus. iii, pp. 178-182, figg. 
. On the existing genera of the Trionychidse. P. Amer. Phil. Soc. xlii, 
pp. 268-274. 
. On some fossil Turtles belonging to the Marsh Collection in Yale 
University Museum. Amer. J. Sci. (4) xviii, pp. 261-275, figg., 
pis. xi-xvi. 
. On the finding of skulls of Trionychidse in the Bridger deposits of 
Wyoming. Science (2) xix, p. 254. 
Herrera, a. L. Correspondence. Amer. Natural, xxxviii, p. 88. 
Hertwig, 0. Ueber eine Methode, Froscheier am Beginn ihrer Ent- 
wickelung im Raume so zu orientiren, dass sich die Richtung ihrer 
Teilebenen und ihr Kopf- und Schwanzende bestimmen last. Festschr. 
Haeckel, pp. 17-30, figg., pi. iii. 
Hill, M. D. Respiration in Frogs. Nature ixix, p. 489. 
Hilton, W. A. Segmentation of the ovum of Desmognathus fusca. Amer. 
Natural, xxxviii, pp. 498-500, figg. 
HoERNES, — . Ueber Koprolithen und Enterolithen. Biol. Centrbl. xxiv, 
pp. 566-576. 
HoYER, M. H. Ueber die Lymphherzen der Frosche. Bull. Ac. Cracovie 
1904, pp. 228-237, figg. 
Hubbard, Marian E. Correlated protective devices in some California 
Salamanders. Univ. Calif, publ. Zool. i, 1903, pp. 157-168, pi. xvi. 
HuENE, F. von. DystrophceiLs mcEinalm Cope in neuer Beleuchtung. N. 
Jahrb. Min., Beil. xix, pp. 319-333, pis. xiv-xvi. 
HuTTON, F. W. Index Faunae Novse Zealandise. London, 1904, 8vo, 
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Hyde, Ida H. Differences in electrical potential in developing eggs. 
Amer. J. Physiol, xii, pp. 241-275. 
Isenschmid, M. Ueber eine von Dr Walther Volz in Sumatra gemachte 
Sammlung von Batrachiern. Mt. Ges. Bern 1903, pp. 68-100, 
pis. i-vi. 
IsHiKAWA, C. Beitrage zur Kenntniss des Riesen-Salamanders {Megalo- 
hatrachus maximus Schleg.). P. Tokyo Mus. i, pp. 19-37, pis. viii-xi. 
Jaekel, 0. Eine neue Darstellung von Ichthyosaurus. Zeitschr. Deutsch. 
geol. Ges. Ivi, Verh. pp. 26-34, fig. 
. Ueber die Bildung der ersten Halswirbel und die Wirbelbildung 
im allgemeinen. T. c. Protok. pp. 109-119, figg. 
■ . Ueber den Schadelbau der Dicynodonten. SB. Ges. naturf. Berlin 
1904, pp. 172-188, figg. 
Jakowlew, N. Ueber Plesiosaurus-Reste aus der Wolga-Stufe an der 
Lena in Sibirien. Verh. Russ. Min. Ges. (2) xH, pp. 13-16, fig., pi. i. 
