1st. =Simple spasmodic colic.= 2d. =Enteralgia or neuralgia of the intestines.= 3d. =Colics from indigestion=, _a_ =tympanitic=, _b_ =from overloading with ingesta=, _c_ =from impaction or constipation=, _d_ =from calculi or concretions= or from =sand=, or =gravel= taken with the food or from =foreign bodies= swallowed, _e_ from =worms in the intestines=, _f_ from =worms in the mesenteric vessels= (thrombo-embolic), _g_ from =irritants taken with the food or otherwise=. 4th. Colics from =structural lesions of the intestines=; _a_ from =inflammation of intestine=, _b_ from =bacteridian inflammation of the bowels=, _c_ from =protozoan inflammation=, _d_ from =chemical or other irritants=, _e_ from =intestinal strangulations=, _f_ from =adhesions=, _g_ from =volvulus=, _h_ from =invagination=, _i_ from =mesenteric omental or phrenic hernia=, _j_ from =strangulated inguinal, femoral ventral or umbilical hernia=, _k_ from =wounds=, =ruptures or perforations of stomach or intestines=, _l_ from =peritonitis or pleuritis=, _m_ from =metritis or ovaritis=, _n_ from =hepatitis or biliary calculus=, _o_ from =pancreatitis or pancreatic calculus=, _p_ from =nephritis=, =nephritic=, =uretral=, =cystic or urethral calculus=, _q_ from =neoplasms affecting any of the abdominal organs=. 5th. Colic due to =lead poisoning=. _Causes of enteralgia and spasmodic colic._ Enteralgia may be defined as a neuralgic pain of the bowel which may therefore be free from spasm or any other appreciable structural or functional change. Its existence in the lower animal is necessarily somewhat problematical, as it can only be inferred from the analogy of the animal with man, and of the enteron with the superficial parts that are more frequently attacked with neuralgia, and also from the absence of visible spasmodic contractions in the bowel which has been the seat of intense pain, yet shows no inflammatory lesion. But whether this is accepted or not, the occurrence of spasm is undeniable and as both are functional nervous disorders the same causative factors will apply to both.