190 Records of the Indian Museum. [Vor. VII, 
tubular spaces (simple tubular glands) between the contiguous 
connective tissue strands. Each space communicates with the 
cavity of the digestive gland by a wide mouth. The epithelium 
consists of elongated ciliated cells with the nuclei placed at the 
base. Numerous goblet cells are found between these ciliated 
cells. The bases of many of these ciliated cells are occupied 
by a number of amoeboid (?) corpuscles with large round nuclei. 
The accessory digestive gland (pl. xxv, figs. 6, 8) is a small 
triangular body lying in front of the digestive gland. The ducts 
of this gland open into the intestine as the latter passes forward 
from the left side of the gland. In the drawing of the alimentary 
canal of A. maximus (5) ducts of two other glands (not repre- 
sented in the figure) are shown to open into the digestive gland. 
Hence it might be inferred that the above gland opens into the 
digestive gland. No such glands seem to be present in A. strubelli, 
A. sempert, and A. sarasini (4.) The process from the digestive 
gland in A. leuckarti seems to be homologous with the accessory 
gland. 
Minute structure (pl. xxvi, fig. 16.)—The gland is surrounded 
by a connective tissue-sheath. It consists of a large number of 
lobules held together by connective tissue. Each lobule consists 
of a group of irregularly polyhedral cells closely apposed to one 
another, although fine channels (with walls composed of con- 
nective-tissue cells only) are often found passing between the 
cells. The protoplasm of most of the cells is coarsely granular 
and is stained red with eosin. ‘These are undoubtedly zymogen 
granules. The nuclei are oval or rounded, and are obscured 
in many cells by these granules. A small proportion of cells 
have clear protoplasm with finer granules and more distinct 
nuclei. The gland is richly supplied with blood vessels which 
are placed inside the lobules. They generally form bundles 
in the middle of the lobules. 
(vi) The intestine is a stout but thin-walled tube arising 
from the left side of the digestive gland towards the ventral 
aspect and close to the opening of the oesophagus. It forms 
a U-shaped loop lying embedded on the dorsal surface of the 
gland and then passes along the left side or on the dorsal aspect 
of (figs. 6, 18) the accessory gland, over the groove on the albumen 
sland and vagina obliquely to end in the anus, which lies on 
the right side in the groove between the foot and the overhung 
margin of the mantle closely behind the female genital aperture. 
In A. strubelli (10) and A. leuckarti (10), the intestine seems 
to be directly continuous with the oesophagus at the anterior 
broad end of the midgut gland, which opens into the gut 
by a wide aperture at the junction of the two. In A. sarasini 
(4) the intestine forms a M-shaped loop lying embedded in the 
wall of the gland and comes out from its anterior end. The 
oesophagus is continuous with the intestine with a wide aperture 
(at the junction) which communicates with the cavity of the 
midgut gland. 
