150 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



SUMMARY 



1. The muscular system consists of two i)arts, a layer lining 

 the body cavity, and strands passing through the connective 

 tissue to the foot, papilla?, and mantle. 



2. The liver communicates with the stomach by numerous 

 large openings. The whole alimentary canal is ciliated. 



3. The kidney is a large sac, with many ramifications, lined 

 with clear, cubical cells, on a very thin basement membrane. 



4. The cerebro-pl'eural ganglia apjiear fused in a mass 

 above, but below and in section show their separate origin. 

 There is a small visceral ganglion on the left side, which sends 

 off one nerve; and a larger one on the right, wliich sends off 

 three. The gastro-o?soi)hageal ganglia are completely fused 

 with the buccal. The ganglia of the gastro-heptic accessory 

 [)lexus are very small, those of the other plexuses are fused 

 into a few large ganglia. 



5. The blood from the posterior aorta passes to the liver 

 mass and thence to the branchijT' before returning to the heart. 

 The blood from the anterior aorta passes back through the 

 lateral sinuses, being aeriated through the skin and especially 

 in the papillae. 



6. The reproductive organs contain numerous glands. The 

 male organs have a large, thin-walled accessory gland, lined 

 with cells that appear empty in the sections, and a smaller 

 gland, lined with tall cells full of globules of secretion material. 

 The oviduct bears a large gland, the cells of which are swollen 

 and full of homogeneous secretion; and within that a smaller 

 gland with dark-staining granular cells. There are a sperma- 

 totheca and spermatocyst. 



