284 Dr. Heineken on the casting off and 



Fig. 6. 



y. tongue. 

 l. V oesophagus. 

 z. z. salivary glands. 

 a. mass of the mouth. 

 ft. /3. cerebral ganglions, 

 y. right lateral ganglion. 

 Fig. 7. y. tongue. 



I. IJ" oesophagus. 

 fi.ft. cerebral ganglions, 

 y. right lateral ganglion. 

 ^, left ditto 

 e. ganglion from cord running from y. 



7}. ditto from c. 



Fig. 8. The stomach opened. 



a. orifice of oesophagus. 

 /3. orifice of biliary duct. 



y. cartilage at the apex of lower portion of the sac. 

 h. the projection at the commencement of the muscular line 

 in the lower surface of the upper portion of the sac. 



Art. XXXV. Experiments and Observations on the casting 

 off and reproduction of the Legs in Crabs and Spiders. 

 By C. Heinekkn, M.D., 3)C. 



to the editor of the zoological journal. 

 Sir, 

 Should the following observations prove acceptable, I shall perhaps 

 be allowed to resume the subject at some future period ; and if I happen 

 unwittingly to have repeated experiments which have before been tried, 

 and to have drawn conclusions which have already been arrived at, it 

 should be borne in mind, that a sojourner in a foreign country has ne- 



