The embryology and metamorphosis of the Macroura . >o ,0, ._y ^ «^55^ rP^C, ^Q{ o M3^ .;15CQJ,:^=^0%;^<J- Fi^.m. Vac: -Y . YC. C}v. ,cl, ALPHEUS SAULCYI 550 MEMOIRS OF THE NATIONAL ACADEMY OP SCIENUES. Plate XLIV.(Stage YII.) Fig. 128. Transverse section through embryo, in the region of the first maxilla. Nervous systemnot yet diflferentiated from the skin. x234. Fig. 12!). Lateral longitudinal section through optic lobe and extremities of autenufe The differ-entiation between the retinal and ganglionic parts of the eve is very clear Meso-blastic cells, repres
The embryology and metamorphosis of the Macroura . >o ,0, ._y ^ «^55^ rP^C, ^Q{ o M3^ .;15CQJ,:^=^0%;^<J- Fi^.m. Vac: -Y . YC. C}v. ,cl, ALPHEUS SAULCYI 550 MEMOIRS OF THE NATIONAL ACADEMY OP SCIENUES. Plate XLIV.(Stage YII.) Fig. 128. Transverse section through embryo, in the region of the first maxilla. Nervous systemnot yet diflferentiated from the skin. x234. Fig. 12!). Lateral longitudinal section through optic lobe and extremities of autenufe The differ-entiation between the retinal and ganglionic parts of the eve is very clear Meso-blastic cells, representing rudimentary muscles, are .seen attached to the body wall. Fig. 130. Surface view of embryo of this stage, wich buds of four post-mandibular appendagespresent The antenn* are covered with a hairy exuvium, which was probablystripped ofi- from the anteunules in this preparation. The mouth is concealed by thelabrum, which nearly meets the thoracico-abdominal fold. The anus is situatednearly at the extremity of the latter, which is slightly emargiuated. x 137Fig. 131. Median longitudinal section in the series from which Fig
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Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectcrustacea
