Aselais phoenicus 6 intestine, with villae. Villae less numerous on down. lower part of small intestine is thin walled without villae. Large intestine - thick walled than small intestine. Very small entrances into caeca. Cannot see a valve arrangement here. However, the dorsal or left wall of the gut here is in a loose fold which, when cloaca is pressed toward head, folds in blocking passage. No flap valve. Calculations: ut: 66.4 gr. ST/ut = 163/66.4 = 2.46 2.45 ST/LI = 163/10 = 16.3 16.30 ST/Dno = 163/41 3.98 3.96 Dno/ut = 41/66.4 .62 .62 Tot.I/ut = 175/66.4 2.64 2.64 Dno/caec = 41/2.5 16.4 16.40 ut./caec = 66.4/2.5 26.6 26.60 ST-Dno/Dno = 122/41= 2.98 2.98