(a) Drone ; () Queen ; (c) Worker, of 

 Honey Bee. (Photo by W. P. Westell.) 



(a) Male ; (b) Female (queen) ; (c) Worker 

 of Wood Ant. (Photo by W. P. Westell.) 



Ventral view of Centipede x 2, 

 Lithobius forficatus. 

 (Photo by H. Main.) 



Millipede, Julus Terrestris x 2. 

 (Photo by W. G. Berridge.) 



Dorsal view of Centipede x 2, 

 Lithobius forficatits. 

 (Photo by H. Main.) 



THK (jARI)KX SXAIL, Helix Asfcrsa, hibernating. (Photo by H. Irving.) 



Note the calcareous epiphragin by which the shell is closed ; and, in the solitary specimen, the 



hole \\ hich permits respiration to take place. 



