4 i 8 MANUAL OF ZOOLOGY sect. 



suddenly projected, point foremost, from the mouth, and is 

 used in the capture of insects. Immediately behind the 

 tongue is the glottis (gl). Teeth are arranged in a single 

 series round the edge of the upper jaw, attached to the pre- 

 maxillse and maxillae ; there is also a small patch of teeth 

 (vo. t) on each vomer just internal to the posterior nostril. 

 The teeth are small conical bodies, their bases ankylosed to 

 the bones ; their only use is to prevent the polished or slimy 

 bodies of the prey — insects and worms — from slipping out 

 of the mouth. 



The buccal cavity narrows towards the pharynx, which 

 leads by a short gullet (gul) into a stomach (sf) consisting of 

 a wide cardiac and a short, narrow pyloric division. The 

 duodenum (du), or first portion of the small intestine, passes 

 forwards parallel with the stomach ; the rest of the small 

 intestine is twisted into a coil. The large intestine or rectum 

 (ret) is very wide and short, and passes without change of 

 diameter into the cloaca (cl). 



The liver (Ir) is two-lobed ; between the right and left 

 lobes lies a large gall-bladder. The pancreas (pn) is an 

 irregular gland surrounding the bile duct, into which it 

 pours its secretion; the spleen (spl) is a small, red globular 

 body attached near the anterior end of the rectum. 



The lungs (I. Ing, r. Ing) are elastic sacs lying in the 

 anterior part of the ccelom above the' heart and liver ; their 

 size and appearance vary greatly according to their state of 

 distention. Each contains a spacious cavity, and has its 

 walls raised into a complete network of ridges abundantly 

 supplied with blood-vessels. The two lungs open anteriorly 

 into a small laryngo-tracheal chamber which communicates 

 with the mouth by the narrow slit-like glottis. The walls of 

 the laryngo-tracheal chamber are supported by a cartilagi- 

 nous framework, and its mucous membrane is raised into a 



