Heraclides of Erythrae, a physician of Erythrae

Erythrae

Erythrae or Erythrai later Litri, was one of the twelve Ionian cities of Asia Minor, situated 22 km north-east of the port of Cyssus , on a small peninsula stretching into the Bay of Erythrae, at an equal distance from the mountains Mimas and Corycus, and directly opposite the island of Chios...

 in Ionia

Ionia

Ionia is an ancient region of central coastal Anatolia in present-day Turkey, the region nearest İzmir, which was historically Smyrna. It consisted of the northernmost territories of the Ionian League of Greek settlements...

, who was a pupil of Chrysermus, a fellow-pupil of Apollonius

Apollonius (physician)

Apollonius was the name of several physicians in the time of Ancient Greece and Rome:*Apollonius Antiochenus, , was the name of two physicians, father and son, who were born at Antioch, and belonged to the Empiric school. They lived after Serapion of Alexandria, and before Menodotus, and therefore...

, and a contemporary of Strabo

Strabo

Strabo, also written Strabon was a Greek historian, geographer and philosopher.-Life:Strabo was born to an affluent family from Amaseia in Pontus , a city which he said was situated the approximate equivalent of 75 km from the Black Sea...

 in the 1st century BC. Galen

Galen

Aelius Galenus or Claudius Galenus , better known as Galen of Pergamon , was a prominent Roman physician, surgeon and philosopher...

 calls him the most distinguished of the pupils of Chrysermus, and mentions a work written by him, On the school of Herophilus , consisting of at least seven books. He wrote a commentary on the sixth book of Hippocrates

Hippocrates

Hippocrates of Cos or Hippokrates of Kos was an ancient Greek physician of the Age of Pericles , and is considered one of the most outstanding figures in the history of medicine...

, De Morbis Vulgaribus, but neither this nor any of his writings survive.