On an Australian Land NcTnertine. ILS 



mass" ill Tet rademma ivdeiicaiiuni, which apparently 

 closely resembles that of Geonemertes au>itralien-si^, while 

 a similar gland appears, according to Biirger, to be frequently 

 met with in marine Nemertines. 



(2) Dorsal Glands (Fig. 6, d. <jl.) — These consist of very 

 numerous small cells arranged typically in peai'-shaped 

 clusters beneath the layer ot longitudinal muscles on the 

 dorsal surface, the narrow end ot each cluster or bunch of 

 cells pointing outwards. These cells are most abundantly 

 developed in the anterior portion of the body, just behind 

 the head, and are met with only occasionally and in small 

 groups towards the posterior end. The individual cells are 

 characterised by staining very deeply with borax carmine. 

 Each has the form of a somewhat egg-shaped sac with the 

 narrow end pointing outwards. In my preparations the 

 granular cell-contents appear frequently to have shrunk 

 down into the bottom or broad end of the sac, where also 

 the nucleus is situated. In hsematoxylin preparations the 

 sacs often appear ahno.st em))ty save for a darkly staining 

 mass lying in the bottom and looking like a local thickening 

 of the sac wall. 



(3 ) Calcareous Bodies. — These are clearly visible under the 

 microscope in crushed preparations of the living worm but, 

 curiously enough, I have altogether failed to identify them in 

 my stained sections. They lie beneath the integument and 

 between the lobes of the alimentary canal. They are oval, 

 often irregular, colourless bodies, about ()-028 mm. in diameter 

 and somewhat resembling starch grains in appearance. They 

 do not, however, stain bine with iodine. Under the action 

 of caustic potash they do not swell perceptibly but become 

 very distinct and exhibit a differentiation into an outer 

 wall and a more or less granular contents. Osmic acid doe» 

 not stain them and alcohol does not dissolve them, at any 

 rate in a short time. They appeared to be unaffected by 

 weak hydrochloric acid so long as I had them under 

 continued observation, but a preparation after prolonged 

 treatment with pretty strong hydrochloric acid (perhaps 

 15 minutes) no longer shewed them. 



From these results I conclude that the bodies in question 

 probably consist of an organic basis more or less impregnated 

 with carbonate of lime. 



Von Graff describes somewhat similar bodies in Geone- 

 mertes chalicophora. They appear to be of about the 



