. Bulletin - United States National Museum. Science. 2.] A TAXOXOMIC STUDY OF THE SALPIDAE METCALF. 17 It is necessary to refer briefly to the embryonic development of this eye. Early in its development the central nervous system of the /?%».» .. . â¢. ⢠.;â /â â : â :'/<-::. â \: Fig. 4.âCtclosalpa pinnata, solitary form, a transverse section of the ganglion and the eye. x 150 diameters. from metcalf (1893, c). m ryo is a short hollow tube opening in front through a funnel. Later the walls of the posterior portion of the tube thicken, first cleP- 'V Fig. 5.âCyclosal
. Bulletin - United States National Museum. Science. 2.] A TAXOXOMIC STUDY OF THE SALPIDAE METCALF. 17 It is necessary to refer briefly to the embryonic development of this eye. Early in its development the central nervous system of the /?%».» .. . â¢. ⢠.;â /â â : â :'/<-::. â \: Fig. 4.âCtclosalpa pinnata, solitary form, a transverse section of the ganglion and the eye. x 150 diameters. from metcalf (1893, c). m ryo is a short hollow tube opening in front through a funnel. Later the walls of the posterior portion of the tube thicken, first cleP- 'V Fig. 5.âCyclosalpa pinnata, embryo, a sagittal section of the de- veloping GANGLION AND CILIATED FUNNEL. X 180 DIAMETERS. FROM METCALF (1S93, C). ventrally, then dorsally (fig. 5), to form the ganglion, the lumenTof the tube becoming obliterated. At the same time the anterior por-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
Size: 1948px × 1283px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
