OCR Text |
Show 1889.] THE BODY-CAVITY IN LIZARDS, ETC. 473 cor, coracoid. c. W, Wolfian body. d.a, avian diaphragm. d.a°, representative of avian diaphragm. d. C, duct of Cuvier. d.M, Miillerian duct. d.M', ligament of duct. dph, mammalian diaphragm. /'. W, foramen of Winslow. f. W, false foramen of Winslow. g, genital gland. h, h', right and left lobes of liver. l.ob, oblique ligament of liver. on, median thoracic septum and abdominal mesentery and ligaments that support the alimentary canal. ml, muscle in avian diaphragm. o, o', right and left aperture in post-hepatic septum. oes, oesophagus. ov, ovary. pa, pancreas. pc, pericardium. pro, proventriculus. put, lung. re, kidney. s.a, s.a', s.a'', s.a'", interclavicular, anterior diaphragmatic, posterior diaphragmatic, and abdominal air-sacs of bird. s.ob, oblique septum. spi, spleen. spi', fatty " spleen " (?). t, testis. v.a, left allantoic, or anterior abdominal vein. v.c.s, vena cava superior. v.c.i, vena cava inferior. v.om, v.om', right and left omphalo-mesenteric vein. v.w, line of attachment of/3 to ventral body-wall. z, seeker passed through false foramen of Winslow. 1, 1', right and left ventral liver-sacs. 2, 2', right and left pulmohepatic recesses. 3, peritoneal cavity. 4, pleural cavity. 4°, pulmo-hepatic portion of body-cavity. a, pulmohepatic ligament. /3, ventral or "omental" portion of post-hepatic septum (ventral ligament of stomach and posterior part of liver). y, oblique abdominal septum (antero-dorsal portion of post-hepatic septum). Figs. 1-28 a#r,e t s,e sleeect teedx tf.r om complete series of sections cut with a rocking-microtome. Figs. 36-41 and 43-47 are drawings of thicker handmade sections. Figs. 1, 2. T w o transverse sections of chick-embryo of 6th day in the region of the lungs and heart. Fig. 3. Transverse section of embryo of Lacerta through same region. Fig. 4. Transverse section of embryo mammal. Figs. 5, 6, 7. Three transverso-horizontal sections of the chick of the 7th day drawn (enlarged) in fig. 25. Fig. 5 is nearest the shoulder; fig. 7 nearest the head and tail (all X 20). PROC. ZOOL. Soc-1889, No. XXXII. 32 |