1895,] MR. F. E. BBDDAED ON NEW EAETHWOE.MS. 225 



The alimentary canal has, as in Kerria TidlopMla, a gizzard, hut 

 it is rather more slightly developed. The muscular walls are only 

 about twice the thickness of the epithelial lining; the chitinous 

 cuticle secreted by the latter is not at all thick. As in all the 

 other species of Kerria, there are a pair of calciferous glands in the 

 ninth segment. The structure of these is, however, a little more 

 complicated than in Kerria zonalis or Kerria macdonaldi, in which 

 species it has been figured by Eisen. 



The walls of the pouch are of considerable thickness and project 

 here and there as folds into its lumen. In the thickness of the 

 walls run numerous blood-vessels ; but the tissue of which it 

 is composed is permeated by channels which are intra-cellular. 

 The tissue in fact looks like a closely welded mass of nephridial 

 tubules. The minute structure recalls that of the dorsal diverti- 

 culum of the alimentary canal in Bucholizia, and it is — so to 

 speak — an exaggeration of the structure \\hich I have described 

 in the distal part of the calciferous gland of Gonluodrilus. The 

 oesophagus is narrow and nowhere sacculated ; its cihation 

 commences at the orifice of the calciferous glands. The large 

 intestine begins in segment xii. Septal glands are present as 

 in other species. I did not find them further back than segment 

 vii. 



The anterior septa are thicker than those which follow. The 

 stoutest are those between segments vi./ix. ; but the three which 

 come next are also moderately stout. The last heart is in 

 segment xi. 



The spermathecse He in segments viii. and ix. ; they are sessile 

 upon the body-wall, with no long stalk, nor have they any trace of 

 a diverticulum. The extreme end of each pouch is enveloped 

 in a thick muscular layer derived from the body-waU ; this is 

 continuous over the pouch for but a short way from the pore. 

 The muscular sheath is so perfectly continuous with the two 

 muscular layers of the body-wall that it is really impossible to 

 say where the body-wall ends and where the sheath of the 

 spermatheca begins. The lining epithelium of the spermatheca is 

 folded and forms numerous narrow ridges. 



The testes, sperm-sacs, ovaries, and oviducts are of the form, and 

 occupy the positions characteristic, of the genus. The spermiducal 

 glands are long and coiled ; the muscular part of the organ is also 

 of considerable length. 



Hab. St. 204, Buenos Ayres, Baraccas do Sul, " Unter Steinen, 

 Ufer des Husses." 



(2) Kerria saltensis, n. sp. 



The general aspect of this apparently new species recalls that of 

 the species Kerria halojphila. But it evidently difiers from that 

 species, though not in very important points ; indeed, all the 

 American species of the genus come near together. I leave out 

 in the following description the majority of the characters which 

 are, so far as our present knowledge goes, of generic value and 



Peoc. Zool. Soo.— 1895, No. XV. 15 



