I02 



HAROLD HEATH. 



out into the pseudo-pallium, in some instances coming in contact 

 with the hypodermal layer. So far as maybe judged from the 

 present specimen every cell possesses a slender ductule extend- 

 ing to its independent opening into the oesophagus. The secre- 

 tion is colorless or of slightly pinkish tinge and in many cases is 

 of less volume than the uniformly granular, strongly staining 

 nuclei. In some instances the last named structures are more 

 or less spherical, and again may be mammillated or formed of 

 approximately eight globular masses as though formed by the 

 incomplete fusion of as many chromosomes. 



Fig. a. Section at level of oesophageal opening into stomach {s(). og, oesopha- 

 geal glands ; i, testis. 



Fig. B. Section corresponding to line A^ Fig. i, PL I. /, liver; ovy ova; s, 

 salivary gland; st, stomach. The pleural pedal ganglion above (in figure) the 

 stomach has, for the sake of clearness, been shifted slightly forward in Fig. i, PI. I. 



The stomach is a voluminous sac extending throughout the 

 greater part of the body proper. Its walls are composed of 

 what appear to be two distinct types of cells (Fig. 3, PI. I.) though 

 they may possibly represent different stages of glandular activity. 

 The more abundant form is almost cubical, highly vacuolated 

 and contains a few slightly yellowish spherical granules. Among 

 these are very much larger elements protruding some distance into 

 the neighboring lumen and distended with a finely granular vacuo- 

 lated material in which are a few spherical granules similar to 

 those of the other type of cell. Opposite the level of the proboscis 

 the stomach is expanded on each side to form a voluminous 



