216 MR. F. E. BEDDARU OIV NEW EAllTUWORMS. [Mai'. 19, 



The spermiducal glands are tubulnr in form and of fair thick- 

 ness ; there is a narrow terminal duct. The glands were bent 

 into an S-shape, and did not extend beyond their segment. 



The ])enial seta? are not particularlv long. They are regularly 

 curved like a bow. There were four of them in each bundle that I 

 examined — two fully mature and two immature. The end of the 

 seta is abruptly truncated, looking very much as if it had been 

 broken off short. There can, however, be no question of such an 

 accident, as all the setae presented the same appearance. The free 

 end of the seta, perhaps one-third of its entire length, is orna- 

 mented by transverse ridges, which are apparent at the edges as 

 notches. 



Hah. St, 99, Magellan Straits, Elizabeth Isl., under cow-dung. 



(4) Acanthodrilus minutus, n. sp. 



Of this species, again, I have only discovered a single specimen 

 in the collection. I have been obliged, therefore, to exercise some 

 care in my dissection of it. 



It is of a pale brown colour in alcohol, being apparently without 

 anv integumental pigment. On a superficial inspection it might 

 easily be mistaken for a small example of Acanthodrilus bovei. 



The worm measures 29 mm., its diameter is 3 mm.; the 

 number of segments 70. It is therefore, with the exception of the 

 Australian Acantliodrilvs madeayi (27 mm.), the smallest Acantho- 

 drilus known. 



The prostomium is continued by furrows over the buccal seg- 

 ment. 



The setse are strictly paired. In smaller immature specimens, 

 but with more segments, the setae were seen to diverge from each 

 other posteriorly as in A. platj/unis &c. 

 The clitellum occupies segments xiii.-xvii. 



The gizzard is large for so small an earthworm, being 2-5 mm. 

 long by 2 mm. broad. The intestine begins in segment xvii. 



Tsone of the septa appear to be specially thickened ; but those 

 in the neighbourhood of the generative organs are, as is the rule, 

 somewhat more obvious than rhe others. 



The testes and sperm-ducts are, as is often the case with the 

 Acanthodrilus of America, single — -that is, there are only one pair 

 of each. 



The sperm-sacs, racemose and of large size, lie in segment xi. 

 The spermiducal glands are thick but not very long ; they are 

 confined to their own segment. It is noteworthy that the pos- 

 terior pair are distinctly smaller than the anterior pair, and less 

 coiled. I have observed the same comuiencing disappearance (?) 

 of one of the two pairs of glands in Acanthodrihis sch)nard(r. The 

 penial setae are long and recurved at the end in a crozier-like 

 fashion, which is so common in the genital setae of these earth- 

 worms. The extremity is expanded and thin, but not ornamented — 

 two in each bundle. 



