ON THE STOMACH IN MAN AND THE ANTHROPOID APE. 13 



From the time of the old anatomist Willis (59), to whom we owe the doubtful 

 advantage of the introduction of the term ' antrum pylori,' the features presented by the 

 pyloric portion of the stomach have received much attention. Cruveilhier (9), Anders 

 Retzius (44), Luschka (30), Jonnesco (27), Erik Muller (40), His (22), and many 

 others have specially studied this section of the organ, and much confusion has arisen, 

 not only from discrepancies in the descriptions which have resulted, but also from the 

 different names which have been applied to its several parts. The term antrum pylori 

 has been employed in many different senses, and in itself is not a little responsible for 

 much of the obscurity which has gathered around the pyloric part of the stomach. 

 Willis applied the name in a somewhat vague way, with the view of distinguishing 

 the part of the organ which adjoins the pylorus. In this country it has been given a 

 more restricted and a more definite application. For the most part British anatomists 

 have indicated by this term the slightly expanded part of the greater curvature which 

 lies opposite the incisura angularis, or, in other words, ' the point ' of the elbow-like 

 bend in the stomach as described by Cruveilhier. Macalister (31), however, uses 

 the term to indicate an expansion on the pyloric part of the lesser curvature. In 

 Germany the term antrum pylori is sometimes applied very much in the original sense 

 of Willis, and is understood to include the whole of the pyloric part of the stomach 

 (Henle (19) and Gegenbaur (14) ) ; at other times it is restricted to a small section of 

 the stomach, about an inch in length, immediately adjoining the pylorus (Luschka (30) ). 

 In France the interpretation of the term has been more in accord with that given to it 

 in this country (Jonnesco and Cruveilhier). Considering, then, the striking dis- 

 agreement amongst anatomists as to the sense in which a term so much in use should 

 be applied, it is not surprising that, in the writings of clinicians and other observers, 

 it is rarely possible to obtain a clear conception of what is meant when we meet with 

 this name. Much credit is due to Erik Muller for the admirable attempt which he 

 has made to clear away the obscurity which has for so long been a leading character- 

 istic of descriptions of this part of the stomach. The reader who is desirous of making 

 himself more fully acquainted with the historical aspect of the question is referred to 

 the account given by this author. Since Muller's work appeared, His has suggested 

 an entirely new terminology for the pyloric region of the stomach. Hasse and 

 Stricker (17), on the other hand, have retained the offending term antrum pylori, 

 and, following Luschka, have applied it to a section of the stomach for which it is quite 

 unsuited. 



Unfortunately, the description given by His of the pyloric part of the stomach and 

 the terms which he has suggested in his recent paper are not in every respect satisfactory. 

 The projecting portion of the greater curvature which lies opposite the incisura angularis 

 he calls the camera princeps. Under certain circumstances it may be useful to have a 

 designation for this part of the stomach, and this name, seeing that it is advisable to 

 abolish the term ' antrum,' will do as well as any other. On the right side, the camera 

 princeps is bounded by a faint but very constant furrow in the greater curvature. This 



