1000 MB. F. E. BEDDAED OX A [Dec. 18, 



segment. I have not counted those upon the body generally, as 

 I haA'e been unwilling to iujure my only specimen. There are 13 

 setae lying between the male pores. At the posterior end of the 

 body the setae are again rather larger aud further apart from each 

 other. This increase in size of the setae at the end of the body is 

 very strongly marked in such a genus as Onychochceta, but I have 

 not observed it to occur commonly in Amyntus l . 



There are dorsal pores, but I am unable to state the exact seg- 

 ment at which they commence. They are at any rate visible upon 

 the clitellum. 



The clitellum extends over segments xiv.-xvi. and includes the 

 whole of those segments. It has no setae upon it. 



The male pores are very inconspicuous. They lie as usual in 

 the line of setae. There are no differentiated genital papillae any- 

 where upon the body ; but, as is shown in the accompanying 

 drawing (fig. 1, p. 999), there are depressions of a groove-like 

 character which may perform the function of adhesive papillae. 

 One of these lies in front of each male pore ; the other, the longer, 

 lies behind it. They are encircled by rather tumid walls. There is 

 in addition a slight medianly placed furrow in front of and behind 

 the line of setae. 



The oviducal pore is single and median and upon segment xiv. 



The spermathecal pores were not visible externally, but the point 

 of their opening would seem to correspond to that of the male 

 pores. 



The alimentary canal calls for no special description except to 

 mention that the intestinal caeca are rather long; when fully 

 extended they reach as far forward as the posterior margin of the 

 spermiducal gland, i. e. to the xxth segment. They arise as usual 

 in the xxviith segment and taper gradually towards the tip ; there 

 is no trace of secondary caeca. The caeca are veiy much longer 

 than those of A. trinitatis. 



In front of the gizzard there are three very stout interseytnental 

 septa. They are bound together and to the parietes by numerous 

 thin strands of muscle. The septum separating segmeuts viii. and 

 ix. is entirely absent. The gizzard is bound to the septum which 

 follows it by a pair of very stout ventrally placed muscular bands. 

 The first two septa after the gizzard are fairly thick and the size 

 diminishes in the next two or three, all of which, however, are tied 

 to each other and to the parietes by thin muscular strands. 



The last pair of hearts lie in segment xiii. 



The reproductive organs show certain features which are of use 

 in the discrimination of the present species from A. trinitatis a or 

 A. heterochcetus 3 , which are its nearest allies, especially the former 

 species. 



The sperm-sacs in xi. and xii. are not in any way remarkable. 



The spermiducal glands (fig. 3) are large, extensively lobulated. 



1 It is to be found, however, in A. heterochcetus. 



2 Beddard, P. Z. S. 1896, p. 206. 



:l Horst, Nederl. Arch. f. Zool. iv. 



