1887.] ANATOMY OF EARTHWORMS. 545 



arrangement of these papilljB there is really some little diiference 

 between the two species. In the first place, C. rusticus has only 

 four of these dumbbell-shaped papillae, while there are five in mv 

 specimen ; this is a diflFerence which might easily be explained away 

 on the assumption that Fletcher's specimens were immature, except 

 for the fact that he has examined a large number. Secondly, the 

 papillae in C. fletcheri are restricted each to one segment, the whole 

 of the ventral area of which they occupy ; in C. rusticus, on the 

 other hand, the papillae appear to be intersegmental in position. 



The male generative pores are upon the eighteenth segment and are 

 placed within the area of the ventral papillae close to the pair of 

 setae. 



The female generative pore is situated upon the fourteenth segment ; 

 it is a single slit-like orifice with tumid lips. 



The apertures of the spermatheca as well as those of the nephridia 

 were invisible in my specimen. 



The setae appear to have the same arrangement as in C. rusticus, 

 viz. a pair of setae on either side of the ventral line moderately close 

 together and a laterally placed pair, the individual setae of which are 

 wide apart '. 



The following notes upon the internal anatomy of the species are 

 of course no more than is necessary for its adequate definition. I 

 hope to be able at some future time to work out more elaborately 

 certain points in the structure of this and other Lumbricidae. 



Alimentary Canal. 



The chief feature in the anatomy of the alimentary canal to which 

 I may call attention is the prest-nce of calciferous glands ; as these 

 glands appear occasionally to be absent in Earthworms, it is 

 iujportant to record their presence in this species. I noticed two 

 pairs of calciferous glands situated in segments 11 and 12; there 

 may have been others, but an accident prevented an examination of 

 the posterior segments. The position of the glands is somewhat 

 unusual ; instead of lying to the side of the intestine as is generally 

 the case (e. g. Acnnthodrilus, P. Z. S. 1885, pi. Hi. fig, 1), they are 

 placed below the intestine, and each gland comes into close relations 

 with its fellow, separated from it, however, by the subintestinal 

 vessel, which is supported by a mesentery. 



The gizzard occupies segments 6 and 7. 



Nephridia. 



Another structural feature of this Earthworm renders it quite im- 

 possible to confuse it with Gryptodrilus rusticus, or, for the matter 

 of that, with any other of tlie Australian species of Lumbricidje. 



Mr. Fletcher speaks of the nephridia as consisting of dendriform 

 masses or tufts of glandular caecal tubes, more developed in the 



1 Since this portion of my paper was written Mr. Fletclier has described 

 (Proc. Lino. Soc. W. S. W., Sept. 1880) a second species of L'rypfodrUus 

 {€'. f:acca7'ii(s), which cannot be conlounded with the specie.s described above. 

 It agrees with C. )-usficui< in the characters of the nephridia. 



