File:The embryology and metamorphosis of the Macroura (1891) (14589644790).jpg

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Identifier: embryologymetamo00brook (find matches)
Title: The embryology and metamorphosis of the Macroura
Year: 1891 (1890s)
Authors: Brooks, William Keith, 1848-1908 Herrick, Francis Hobart, 1858-1940 National Academy of Sciences (U.S.)
Subjects: Crustacea Crustacea
Publisher: (Washington : National Academy of Sciences : Government Printing Office
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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posited in the eye. In Fig. 146 the developmental history of theretinal layer is well shown. x230. Fig. loU. Nearly median longitudinal section of embryo in similar stage. x58. Pig. 153. Sagittal section of similar embryo, showing degenerating elements in yolk below «lorsalplate. X 58. REFERENCE LETTERS. J. I, first anteuna. A. II, second aatenna.Ab., abdomen. B. C, blood corpuscle.B. S., blood space.cp., carai)ace. Deg., degenerating cells. Dp., dorsal plate. End., eudoderm. /(/., foregut. fa., fiber mass of nervous system. g. II-III, brain. g.c, ganglion cell. g. VI. a., anterior gastric muscle. H., heart. hd., hypodermis. Hi/., hindgut. Lb., labrum. Md., mandible. Mes., mesoblast. ilit.f., flexor muscle. ocm., oesophageal commissure. e.g., optic ganglion. O. L., optic lobe. pi., punct substanz. pr., perineurium. lit., retinogen. S. 0. 6f., supra-osophageal ganglion. T., telsOD. Tc, transverse commissure. Th., thorax. Vac, vacuole. y., yolk. y. C, wandering cells. Plate XIM. 146. A
Text Appearing After Image:
ALPHEUS 556 MEMoms OF the national academy of sciences. Plate XLVII. (Stage IX.) Figs. 154, 155. Transverse sections tbrougii eutire embrjo of Alpheus saulcyi. In Fig. 154 a yolknest is cut. Blood spaces occur near the surface of the egg. xtil. Fm. 15C. Cell nest, containing degeneration products. Its position in the yolk is shown in Fig.154. x245. Fig. 157. Part of median longitudinal section through the thoracic-abdominal flexure. The grow-ing endodernial epithelium and its fusion with the lining of the intestine are particu-larly well shown. Wandering cells appear to be uniting with the endoderm. x245. Fig. 158. Sketch of egg embryo, Alpheus saulcyi, of same phase as that represented by Fig. 157.X61. Fig. 159. Horizontal section through brain and eyestalks of a slightly older embryo. x<»l. Fig. 160. Part of transverse section of similar embryo on level with the mandibles. x245. Fig. Ifil. Superficial part of section of egg, showing surface cells, blood corpuscles, and a wander-

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