A specimen of annular pancreas

; a series of 105 specimens of adult human pancreas and duodena recently studied in the anatomical laboratory at C'ornell University, Ithaca, x. 17., one specimen of annular pancreas was discovered. This rare arid interesting anomaly, in which the duodenum is encompassed by a ring of pancreatic tissue, I have been able to find reported hut eight times in the literature. -4 compilation of the reports upon these specimens is herewith presented.