Sac; amniotic 41; embryonic 35. Sacculus hemisphericus, 115. SCHENK, 133, 137. SCHULTZE, Max, 106. SCHWARCK, 155, 157. Sections, 250-252, 254, 255, 258, 260, Segmentation, 22—26, 264, 265; se- Seminiferous tubules. See Tubuli Septum nasi, 237; septum of the SERNOFF, 162, 167. Serous cavity, 38; layer, 45. Sexual eminence, 166. Shell-membrane, 12. Sinus rhomboidalis, 60, 190. nalis, 69; venosus, 123, Vas deferens, 168. V. Vascular area, 28, 56, 57, 84, 85; v. Veins; allantoic 210; cardinal 124; Venous circulation, 170, 211; venous Ventricles, 79, 193; fourth ventricle CAMBRIDGE: PRINTED BY C. J. CLAY, M.A. AT THE UNIVERSITY PRESS. BEDFORD STREET, COVENT GARDEN, LONDON, September 1874. MACMILLAN & Co.'s CATALOGUE of WORKS in MATHEMATICS and PHYSICAL SCIENCE; including PURE and APPLIED MATHEMATICS; PHYSICS, ASTRONOMY, GEOLOGY, CHEMISTRY, ZOOLOGY, BOTANY; PHYSIOLOGY, ANATOMY, and MEDICAL WORKS generally; and of WORKS in MENTAL and MORAL PHILOSOPHY and Allied Subjects. MATHEMATICS. 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