Archive image from page 789 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana01todd Year: 1836 774 CRUSTACEA. Fig. 41 G. Fig. 417. Digestive canul of ike Maja. a, Cardiac portion of the stomach. b, b, Upper portion of the frame-work of the stomach. c, Pyloric portion of the stomach. d, The small intestine. e, Termination of the biliary ducts. f, Anterior appendages of the intestine. g, Posterior appendages. h, Rectum. and even in the several species of the same genus. Still every one of them may be de- monstrated with a little care, in the whole of t
Archive image from page 789 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana01todd Year: 1836 774 CRUSTACEA. Fig. 41 G. Fig. 417. Digestive canul of ike Maja. a, Cardiac portion of the stomach. b, b, Upper portion of the frame-work of the stomach. c, Pyloric portion of the stomach. d, The small intestine. e, Termination of the biliary ducts. f, Anterior appendages of the intestine. g, Posterior appendages. h, Rectum. and even in the several species of the same genus. Still every one of them may be de- monstrated with a little care, in the whole of the Brachyura and of the Macroura. They are less numerous, and are singularly modified in proportion as we recede from these types. In the Squilla mere vestiges only of the ap- paratus are found in two semicorneous pieces covered with rounded projections; and its functions are performed by a branch of each mandible which penetrates even to the pyloric orifice of the stomach. The intestine extends from the pylorus to the anus without curve or convolution in its course (t/?, d,K). In the superior Crustacea Liver of the Lobster. a, stomach; b, intestine; c, left lobe of the liver in its natural state ; d, right lobe dissected, so as to show its structure and the disposition of the biliary ducts. it may be distinguished into two portions, one of which may be named the duodenum, the other the rectum. These two portions where they occur vary extremely both in their nature and in their relative lengths. Sometimes they are separated by a valve (Lobster) corresponding internally to a circular external elevation; but still more frequently their respective limits are not obviously marked, and among the whole of the inferior members of the family the intestinal canal is entirely cylindrical, and per- fectly identical in its constitution through its whole length. The anus is constantly seated in the last ring, and is closed by certain mus- cular fibres which perform the office of a sp
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