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Fig. 1. Cephalic veins of a late embryo of Tropidonotus natrix, head 7.5 mm. long. X 24. After Grosser and Brezina, ...the jaw and runs dorsad on the lateral aspect of the pterygoid bone. In an embryo Lacerta Avith head 5.2 mm. long this vein is connected with the vena mandib

Staff Member, Department of Embryology, Carnegie Institution Of Washington. Baltimore. Maryland J. Anat., 96, 229-253.

253. Fig. 23 Caudal end of a bo nun. Alustelus embryo. Note that the pores of

...esearch rooms" at Woods Hole wishes to acknowledge his indebtedness to the Carnegie Institution for the opportunities thus presented for the carrying on of thi Merzbacher ('00, p. 253) states that the leg reflex of a frog, so placed that its legs hang free in

...o him the problem: If the spermatic fluid might stimulate the heart of the embryo in the process of fertilization, why might not other fluids produce the sam ...the diverse modifications which it undergoes, all the other organs of the embryo. '

Fig. a. Normal carapace of Malaclemmys centrata (Latr.) (No. 253 of Table V). A median series of unpaired scutes composed of a small anterio 253 254

the development of the embryo. 130, 253.

Mabel Bishop. The nervous system of a two-headed pig embryo. Twenty figures 379 Hamilton, D. J. 1885-1886 On the corpus callosum in the embryo. Brain, vol. 8.

Sthrtevant, a. H. 1919 Inherited linkage variations in the second chromosome. Carnegie Inst., Wash;, publ. 278, pp. 305-341. ...heir capacity to retain the haematoxylin stain. Belar (’26), in his figure 253, presents an extended series of sketches illustrating the structure and div

Translation by Joat V Nonidu Carnegie Institution Wuhington Translation by Jos6 P. Nonidez Carnegie Institution of Washington

...r regions of the body. The sweat glands first make their appearance in the embryo in these regions. These areas also lend themselves readily to an extensive Contributions to Embryologj-, Carnegie Institution of Washington,

...erning certain cytological characteristics of the erythroblasts in the pig embryo and the origin of non-nucleated erythrocytes by a process of cytoplasmic co ==The Development Of The Rectum In The Human Embryo==

...probably for the carotids." Thus the evi ' See the figures of the skull in embryo marsupials, edentates, insectivores, etc., as figured by Broom, Parker and ...n so far as they lie between the pterygoids and the quadrates. Likewise in embryo mammals the cartilaginous alae temporalis are interpreted by Broom ('09) as

1.253 253.1

...hem to enlarge and function. Again, that large venous network in the early embryo which is associated with the azygos vein and which later disappears may be ...pment of the lymphatics of the lungs of the embryo pig. Contrib. Embryol. (Carnegie Inst.), Wash., 1916, IV, 47.

...blystoma punctatum, with a discussion of certain eye defects. Nine figures 253 4.253

...ennent have made experiments in which the paternal influence in the hybrid embryo was diminished. Tennent states that in the cross between Hipponoe and Toxop ' Tennent, Publication 132, Carnegie Institution, 1910.

...tion of the marsupial blastocyst with the trophoblast of the Eutheria, the embryo of the former, therefore, being without trophoblastic covering. ...on in similar conditions independently discovered by Patterson CIO) in the embryo of the Tatusia.

...e from each and consequently no defects except in size would appear in the embryo. Experiments on later stages, however, indicate absence of localization as ...ved and the remaining one will develop into a perfectly normal but smaller embryo. Morgan- succeeded in producing such embryos and I have also been able to d

University of Cincinnati Carnegie Institution WARREN H. LEWIS Carnegie Laboratory oj Embryology, Johns Hopkins Medical School