128 



W. C. ALLEE. 



forward allowing the knife to follow the path of least resistance. 

 Do not cut too* far from the median line on account of the trabec- 

 ulae. Finally separate the ventral leaf with the viscera attached 

 from the dorsal leaf of the exoskeleton which may be thrown 

 away. Use the hand to make the separation. Cut the muscles 



FIG. 2. Diagram of ventral view of Limulus, showing location of line of 

 primary incision. 



where necessary with a scalpel but take due care not to injure the 

 pericardium and heart lying along the mid-line. Finally lift out 

 the whole of the visceral mass and place, dorsal side up, in a deep 

 crystallization dish. Continue the dissection under sea water. 



2. The mush which covers the lateral parts of the animal is 

 composed of gonad (orange) and liver (yellowish-green). 



