CHAPTER VII. 



THE ALIMENTARY CANAL AND ITS APPENDAGES. 



SPECIAL REFERENCES. 



CHOLODKOWSKY. Zur Frage liber den Ban und liber die Innervation der Speichel- 

 driisen der Blattiden. Horce Soc. Eijtom. Rossica?, Torn. XVI. (1881). [Salivary 

 Glands of Cockroaches.] 



SCHINDLER. Beitriige zur Kenntniss der Malpighi'schen Gefiisse der Insekten. 

 Zeits. f. wiss. Zool., Bd. XXX. (1878). [Malpighian Tubules of Insects.] 



CHUN. Ueber den Bau, die Entwickelung, und physiologische Bedeutung der 

 Rectalclriisen bei den Insekten. Abh. der Senkenbergischen Naturforschers Gesell- 

 schaft, Bd. X. (1876). [Rectal Glands of Insects.] 



LEYDIG. Lehrbuch der Histologie, &c., and VIALLANES. (Loc. cit. supra, chap, iv.) 

 [Histology of Alimentary Canal.] 



BASCH. Untersuchungen iiber das Chylopoetische und Uropoetische System der 

 Blatta orientalis. I^ais. Akad. der AVissenschafteu. (Math Nat. Classe.), 

 Bd. XXXIII. (1858). [Digestive and Excretory Organs of Blatta.] 



SIRODOT. Recherches sur les Secretions chez les Insectes. Ann. Sci. Nat., 4" Serie, 

 Zool., Tom. X. (1859). [Digestive and Excretory Organs of Oryctes, &c.] 



JOUSSET DE BELLESME. Recherches experimentales sur la digestion des Insectes 

 et en particulier de la Blatte (1875). 



PLATEAU. Recherches sur les Phenomenes de la Digestion chez les Insectes. Mem. 

 de 1'Acad. Roy. de Belgique, Tom. XLI. (1874). [Now the principal authority on the 

 Digestion of Insects. The other physiological memoirs cited (Nos. 5, 6, 7) are chiefly 

 of historical interest. ] 



PLATEAU. Note additionelle. Bull. Acad. Roy. de Belgique, 2 e Ser., Tom. XLIV. 

 (1877). [Contains some corrections of importance.] 



The Alimentary Canal 



THE alimentary canal of the Cockroach measures about 2f 

 inches in length, and is therefore about 2| times the length of 

 the body. In herbivorous Insects the relative length of the 

 alimentary canal may be much greater than this ; it is five 



t/ * 



i 



