. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. PANCREAS. 93 in all. The appearance of the frill of pyloric caeca is shown in fig. 67, and one of the bunches separate in fig. 68. In the Salmon this apparatus of caeca is much more voluminous. It is not condensed around a particular portion of the intestine, but extends linearly, from close to the duo- denum for a distance of about eight inches along the intestinal wall; each caecum opens There is no by its own separate orifice. coalescence or fusion, so that the inside of the intestine there are seen as many orifices a
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. PANCREAS. 93 in all. The appearance of the frill of pyloric caeca is shown in fig. 67, and one of the bunches separate in fig. 68. In the Salmon this apparatus of caeca is much more voluminous. It is not condensed around a particular portion of the intestine, but extends linearly, from close to the duo- denum for a distance of about eight inches along the intestinal wall; each caecum opens There is no by its own separate orifice. coalescence or fusion, so that the inside of the intestine there are seen as many orifices as caeca; they form a double row on each side, so that altogether there are four rows, and are arranged with the utmost regularity. The amount of secreting surface of these caeca some of them are ten big round as a tobacco-pipe; they rapidly on looking on must be very inches long, great ; and as Fig. Portion of the alimentary canal of the Salmon (Salmo »«/«/•), showing one double row of ctccal appetidayes and the pyloric extremity of the other. a, oesophagus; b, stomach; c, pylorus; d, small intestine; e, gall-duct. (One-third the natural diameter.) increase in length from the first three down- wards, and the third from the stomach is generally the longest. They then gradually diminish, slightly in calibre, considerably in length, to those furthest down the intestine, which are pbout three inches long. Altogether the secreting surface of these caeca must con- siderably exceed that of the rest of the ali- mentary canal, and the whole apparatus, taken together, is next to the liver, by far the largest of the viscera. Each double row con- tains about thirty, so that altogether there are sixty caeca, and as the average length of each caecum is 6£ inches, the whole length of secreting surface must be 390 inches, or upwards of 32 feet. In their internal ultimate structure these caaca exhibit considerable variety ; in many the mu- cous surface is closely laminated ; in some
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