432 



ANATOMY OF VERTEBRATES. 



329 



Lemurs than in Galagos : the caecum was 7 inches long in a 

 Lemur Mongoz ; it was loosely suspended, as in other Lemu- 

 ridce. 



In the small Platyrhines {Midas, Jacchus) the oesophagus is 

 continued a short way into the abdomen, and the stomach 

 resembles that in Lemuridce : the duodenum becomes free in 

 passing to the left. The caecum is of moderate length, cylindrical, 

 curved: two longitudinal bands are continued from it along the 

 colon. In Jacchus vulgaris the -small intestines are twice the 

 length of the body, the large intestines once that length. The 

 cardiac sac of the stomach is large in all Platyrhines, but the 

 cardia and pylorus are less approximate in the larger kinds. 

 In Ateles and Mycetes Cuvier notes a tendency to sacculation 

 along the great curvature. The caecum is 4 inches long and 

 1 inch broad in Cebus ; in Ateles it is subconical, the base being 

 next the colon. In Mycetes the caecum is proportionally shorter, 

 but retains the simple unsacculated character. 



In Cercopithecus the oesophagus, with a short abdominal course, 

 opens into the stomach midway between the left and right ends : 



in Macacus and Cynoce- 

 phalus the left sac is re- 

 latively less : the chief 

 modification is presented 

 by the Doucs, or those 

 tailed monkeys which 

 have a fifth tubercle on 

 the last lower molar, 

 and are without cheek- 

 pouches. In a Semno- 

 pithecus entellus which 

 measured 1 foot 8 inches 

 from the mouth to the 

 vent, I found the sto- 

 mach, fig. 329, 2 feet 7 

 inches along the greater 

 curvature, and 1 foot along the lesser curvature. To the left 

 of the cardia it forms a large and sub-bifid pouch : the middle and 

 widest part of the stomach is puckered up into several large 

 sacculi : the pyloric portion is long, narrow, curved and sac- 

 culated along the line of the greater curvature to within one- 

 third of the distance from the pylorus, where it is simple and 

 gradually contracts to that orifice : the vascularity and structure of 

 the lining membrane of the third division indicates it as the chief 



Stomach, distended ; Semnopitliccus Entellus. cxxxix' 



