ABSTRACT
The original study devoted in part to the structure of crinoid gut is that of Chadwick. The mouth generally is located at or near the center of the theca, although it is situated rather marginally in some comasterid species. In all recent crinoids that have been studied, the gut makes one or more dextral coils inside the thecal cavity. The intestine turns off to the right and coils around the esophagus, then turns upwards and ends in the anal cone. The hind-gut of these camerates would run from the basis of the mid-gut to the anal opening, winding around the exterior of the perigastric coelom. Thus, according to the diagrams of Haugh and Haugh and Bell, the gut of camerates consisted of a collecting fore-gut or esophagus, an enlarged mid-gut or stomach completely surrounded by a perigastric coelom, and a tubular more or less coiled hind-gut or intestine.
