20 SPECIAL ANATOMY OF THE TERRESTRIAL 



laterally and inferiorlj at the posterior part of the buccal 

 body ; the former passing inwards and forwards, the lat- 

 ter forwards to the anterior extremity of the organ, which 

 is free, and projects into the triangular, oval canal. The 

 lateral fasciculi leave between them superiorly an inter- 

 stice, at the bottom of which is found the lingual lamina, 

 in the form of a tube, closed posteriorly, and open and 

 reflected downwards and backwards upon the anterior, 

 free tip of the organ. Into the posterior extremity of 

 the lamina, the middle fasciculus of the retractor mus- 

 cle of the buccal body is inserted ; and, just anterior 

 to this insertion, a small, attrahent fasciculus, arising 

 from the roof of the buccal body, posterior to the orifice 

 of the oesophagus, wdiich gets to the lamina by means of 

 the interstice of the muscular organ superiorly. The 

 teeth of the lingual lamina are arranged diagonally, from 

 the middle line, in parallel rows, passing from within out- 

 wards. 



The oesophagus issues from a fissure at the upper poste- 

 rior line of the anterior third of the buccal body. It is 

 long and cylindrical, and rather wider at its termination 

 than at its origin. The stomach is irregularly cyhndroid, 

 and has a cul-de-sac at its commencement, projecting an- 

 terior to the entrance of the oesophagus. The small intes- 

 tine is capacious. 



The salivary glands are conjoined, so as to form a cir- 

 cular collar around the posterior part of the oesophagus. 

 The salivary ducts are long, and enter the same fissure 

 of the buccal body at which the oesophagus issues. The 



