Reproduction of Lost Parts in the Lohster. 



177 



Table of Measurements— Length in Inches. 



Note. — The preceding measurements are all taken from the preserved 



exuvia, or from the living lobster. 

 Length of carapace is taken from tip of rostrum to posterior edge of 



carapace. 

 Length of abdomen is taken from posterior edge of carapace to apex of 



telson (excluding fringe). This measurement is not so exact as that 



of carapace, since a variation in the amount of overlapping of the 



abdominal somites in drying will affect the result. 

 The two measurements together give the total length. 

 Chelate Li7nhs. — On account of difficulty in measuring exactly the total 



length of the chelate limbs, owing to increasing flexure with successive 



moults, the length of the terminal pincer joint has been given as a 



basis for comparison. 



A perusal of the foregoing notes will show that my obser- 

 vations on the reproduction of lost parts in the lobster differ 

 in several respects from those previously recorded for the 

 freshwater crayfish. I now propose to discuss shortly the 

 results arrived at. 



Eeproduction of Chelate Limbs. 

 My observations on the reproduction of lost chela? in the 



