AlfATOMT "/' ////•: LOSSTEli. 



83 



is afterwards scooped oul through a large opening 

 passage on each side of Iho head, bj a membranous ap- 

 dage of the leg, called the " gill-paddle " (flubel 

 i). 

 The digestive system consists of a mouth, opening 1 

 the mandibles, an oesophagus, a large, membranous stom- 

 ach, with very lar h for crushing the food within the 

 large or cardiac portion, while the posterior <>r pylo 

 forms a strainer through which the food p; uto tho 

 , straight intestine, which ends in tho 



liver It . dark 



n. with i wo ducts emp- 

 tying on each side into the 

 junction of the stomach 

 with tin- intestine. 



The nervous system con- 

 sisl 3 of ;i brain situated di- 

 ly iiinler the base of the 

 rum (supt liageal 



ganglion), from which a 

 pair of optic ner to 



the two eyes, and a pair to 

 each of the four an ten i 

 The mouth-parts arc sup- 



Flab 



<--)•/> 



I>. 



ill 





mj> 





dp 



IS — />. second maxillipede 

 podite; end, endopodite; flab, epipodite pllfd with nerves from the 

 or flabellum, or scaptogathnite. .. , , , ■ 



mfraoesophageal ganglion, 

 which, with the resl of the nervon m, lies in a lower 



plane than the brain. There are behind these two 

 eleven others; the cephalo- thoracic portion of the Cord is 

 protected above by a framework of solid pr< -. which 



forms, as it were, a " false-bottom" to the cephalo-thorax; 

 this has to be carefully removed before the nervous cord 

 can be laid bare. A sympathetic nerve a d each 



side of the oesophagus and distributes branches to the 

 stomach. 



The nerves of special sense are the optic and auditory 

 nerves. The eve- are compound, namely, composed of 



