24 



SOURCES OF KINETIC AND METABOLIC HORMONES 



lobes; the ends of their secreting axons are aggregated into 

 distinct storage-and-release organs, known as the sinus gland 

 and Hanstrom's sensory pore organ respectively. 

 A third group of neurosecretory cell bodies has been found in 



(a) 



Fig. 2-5. Neurosecretory cells (n.c.) in decapod Crustacea, (a) 

 Brain, connectives and fused ventral ganglia of a crab, Gecarcinus, 

 and (6) eyestalk of Gecarcinus, cut open dorsally to expose the 



