Text-book of comparative anatomy . e Entwickelungsgeschichte von Cctochilus septentrional is. Ibidem. 3 Bd. Reichenbach. Studicn zur Entu-ickclungsgcschichtc dcs Flusskrcbscs, in Abh. d. Scnkcnb. Nat. Gcscllsch. zu Frankfurt. 14 Bd. addition, treatises of E. van Beneden, Bobretzky, \V. K. Brooks, Claus, Dohrn, Grube, Hoek, Joly, Lereboiillet, Krohn, Kossmann, P. Mayer, Fritz Miiller, Pagenstecher, Richters, Uljanin, Spence Bate, Thompson, Metschnikoff, etc. 414 COMPARATIVE ANATOMY CHAP. First Appendage to the Class of Trilobites, Gigantostraea, Hemiaspidse and
Text-book of comparative anatomy . e Entwickelungsgeschichte von Cctochilus septentrional is. Ibidem. 3 Bd. Reichenbach. Studicn zur Entu-ickclungsgcschichtc dcs Flusskrcbscs, in Abh. d. Scnkcnb. Nat. Gcscllsch. zu Frankfurt. 14 Bd. addition, treatises of E. van Beneden, Bobretzky, \V. K. Brooks, Claus, Dohrn, Grube, Hoek, Joly, Lereboiillet, Krohn, Kossmann, P. Mayer, Fritz Miiller, Pagenstecher, Richters, Uljanin, Spence Bate, Thompson, Metschnikoff, etc. 414 COMPARATIVE ANATOMY CHAP. First Appendage to the Class of Trilobites, Gigantostraea, Hemiaspidse and Xiphosura. I. The Trilobites. These extinct Articulata are found only as fossils, and only inpalaeozoic formations. Body (Fig. 281). The integument of the upper side was hard;but on the under side soft. The body falls into 3 divisions,cephalic shield, thorax, and caudal shield (pygidium). Each of thesedivisions is again divided by 2 almost parallel longitudinal dorsalfurrows (the thorax most distinctly) into an arched middle area.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
