RESEARCH ON THE DIGESTIVE SYSTEM OF THE SCHIZOPODA 29 



The glands. 



Salivary glands of an acinous formation, lying in the walls of the 

 œsophagus, hâve been described by varions authors (Huet). 



RosENSTADT has found tliem to exist in ail the Edriophthalmia. 



Professer Ide is of the opinion that thèse glands do not open into the 

 digestive canal, although they hâve probably physiological relations with 

 the digestion. 



In an earlier work the same author gives a cytological study of thèse 

 formations that he calls cutaneous glands. 



In Mysis they are situated in three différent régions. 



Large masses of them are found in the neighbourhood of the mouth 

 and œsophagus, fig. 5, gs. 



They extend almost as far as the opening of the œsophagus in the 

 ventral surface of the stomach. 



They terminate just below the nerve cords through which the œso- 

 phagus passes. 



They are found again, in small masses, lying externally at each side 

 of the long muscles which run from the chitinous bar to the dorsal integu- 

 ment, fig. 6, gs, and again in large iTiasses situated at each side below the 

 pyloric cavity. 



A part of the mass lies close to the opening of the digestive gland into 

 the pyloric cavity. 



Below, they extend as far as the viscéral ganglia of the nerve chain. 



Above, they run along the viscéral blood vessel immediately below the 

 pyloric chamber. 



Thèse acinous glands are of very délicate construction and we hâve 

 been unable to discover where they open into the digestive tract. 



They are not found as acinous glands in Gastrosacciis, Aïysidopsis 

 and Nyctiphanes. In their place, very large cells are seen which probably 

 hâve intra-cellular canals, but we cannot say whether they hâve any in- 

 fluence on the digestion. 



Digestive glands or hepatopancreas. 



Thèse glands form a sécrétion which passes into the pyloric chamber 

 where it is mixed with the masticated food. 



In ail the species of the Schizopoda that we hâve examined, thèse 

 glands are found to be enormously developed, fig. i, gl. 



