220 MR. F. E. UEDUARU OX NEW E.VRTIIWORMS. [Mar. 19, 



The testes and the funnels are in segment x. 



The spermiducal glands are coiled a good deal ; the first pair 

 are distinctly larger than the second pair ; as this was found to be 

 the case in two specimens not selected in any way, it may, i 

 imagine, be safely regarded as normal for the genus. I have 

 pointed out in the present paper that Acanthodrilus minutus 

 shows the same peculiarity, also seen in the x'\.ustralian Acantho- 

 clrilas svhmardce. The penial setae are expanded and recurved 

 at the extremity, and are very similar to those of Acanthodrilus 

 2>latyurus. 



Hah. St. 39, Island of Teja, Valdivia. 



(9) Acanthodrilus putablensis, n. sp. 



Of this species there were two examples, one of which was 

 larger than the other. I had at first passed by the worms on the 

 assumption that they were examples of Acanthodrilus platyurus. 

 The coloration, however (of the preserved worms), is a little 

 different from that of any of the examples of A. platyurus in 

 the collection ; and a nearer inspection showed other external 

 differences which rendered their separation from A. platyurus 

 even more obvious. The main external difference is in the 

 arrangement of the setae ; but in order to appreciate it properly, 

 for it is, after all, slight, it is requisite to compare individuals 

 of both species somewhat closely ; it can then be mnde out that, 

 while there is the same divergence of the setse of each pair from 

 each other posteriorly, the distance which ultimately separates 

 the setse of each pair is distinctly greater in the species now 

 under consideration than in the allied A. platyurus. 



The worms were of stout build, and evidently rather contracted 

 by the preservative reagent. The length is 82 mm. by 8 mm.; 

 number of segments 150. 



The skin of one individual was invaded by numerous encysted 

 Gregarines. These formed a series of white warts upon the skin, 

 a situation where I have never before observed Gregarines; the 

 interior of the body was also full of the parasites. 



The prostomium is quite completely developed, dividing the 

 buccal segment. 



The clitellum occupies segments xiv.-xvi. 



The gizzard is stout and lies . in segment vi . ; after the gizzard 

 are two thin septa ; those separating segments viii./xiv. are 

 strengthened. The last hearts are in segment xiii. It is the 

 reproductive organs which show the greatest differences from 

 A. platyurus. The testes, howeA'er, are, as in that species, one 

 pair in x. ; the funnels in the same segment are highly vascular, 

 as are also the oviducts, which occupy the usual position. The 

 sperm-sacs are not like those of A. platyurus, in that one pair 

 exist in the xiiith segment ; there is another pair in ix. Although 

 the sperm-sacs are in xiii., I presume that the ovaries are there 

 also, for the oviducal funnel undoubtedly projects into that segment. 



