302 PERIPATUS, MYRIOPODS, AND INSECTS. 



orifice, with a remarkable stopper arrangement, into the 

 digestive region or chyle stomach, which is separated by a 

 pylorus from the coiled small intestine. The inner wall of 

 the small intestine bears numerous rows of chitinous teeth 

 set in longitudinal ridges, and is perforated by the apertures 

 of the excretory tubules. At the junction of the small with 

 the large intestine, there are six brownish plates, perhaps 

 functioning as valves. 



In connection with the anterior region of the gut, there is a very 

 complicated series of glands. First, we have in the workers only, on 



B 



FIG. 98. Nervous system of Bee. (After CHESHIRE.) 



A, Of larva ; B, of adult ; , antenna ; mx, maxilla ; *, mandible ; 

 w, origin of wing ; 1-5, abdominal ganglia. 



either side of the head, a long coiled gland which is intracellular in 

 type. ^ It is largest in the so-called " nurses " which feed the young, and 

 diminishes in size kter. According to Mr. Cheshire, this gland secretes 

 a nitrogenous fluid which is furnished to all the larvae in their early 

 stages, but is supplied to the future queen during the whole of the 



