GEKERAL ANATOMY OF A CRAB. 



199 



ostia into the heart, to be forced out again through the 

 arteries at each contraction. 



u. The Digestive Organs. 



These are the mouth appendages^ the oesophagus, the 

 stomach, the pyloric coeca, the liver, the intestine j and the 

 intestinal coecum. 



Fig. 103. 



Fig. 103. — Female specimen of Callinectes hastatns ; opened from below 

 to show the reproductive organs. (Drawn from nature by J. E. Arm- 

 strong. ) 



-1. Antennules. An. Antennae. E. Eyes, a 6". Abdomen. 6. Pyloric 

 pouch of Btoniach. e. Cardiac pouch of stomach, j. Intestine, m. Man- 

 dible, o. Crossbar of ovary, o r. Ovar}\ p. Seminal receptacle, q. In- 

 testinal coecum. p I. Abdominal appendages, r. Oviduct. 



