662 OLIGOCHAETA 



have the imbedded portion more curved, otherwise not modified. Clitellum, XIV— XXV, 



Male pore on XX. Gizzard in VIII ; calciferous glands in IX, X, XL Hearts in XII, 



XIII. Sperm-sacs in XII {and XIII), XIV. Hah. — Pedga Agu, Brazil. 



The calciferous glands of this species appear to have rather a remarkable form. 



They are described as being ' a reddish, ovoid body, opening into the intestine by 



means of a short, narrow stalk, and constricted near its free extremity in such a way 



that this portion has the appearance of a short cone, inverted on the end of the 



ovoid portion.' The intestine begins in xvi, and is at first deeply constricted by 



septa ; in segment xxvi, after a particularly deep constriction, the sacculated intestine 



begins, which has a typhlosole. The nephridia commence in iii. The seven anterior 



pairs differ from the rest in having a larger vesicle, near to the free extremity of 



which the tube opens. 



(3) Urobenus papillifer (Michaelsen). 

 Anteus papillifer, MiCHAELSEN, Arch. f. Nat., 189a, p. 314. 



Definition. Length, 12a mm.; diameter, 5-6 mm.; number of segments, 130. Setae 

 commence on segment III ; those of clitellum ornamented. Clitellum extends from 

 XV-XXV. Tubercula pub ertatis forming a ridge on either side of segments XIX— XXIII. 

 Male pore, XIX/XX. Gizzard in IX, X. Ilab. — Porto Alegre. 

 This species has, as its specific name implies, numerous papillae, which are very 

 variable in position. The modified setae of the clitellum protrude from their apices. 

 In one specimen there were four pairs on x-xvi, and an additional one corresponding 

 to lateral setae of x ; in another they were developed on x (two pairs) xvi, xvii, xxiv ; 

 in a third there were ventral papillae on x, xi, xv, and lateral on x. The sperm- 

 sacs have, according to Michaelsen's account, a very abnormal position ; he describes 

 them as being in segments xiii-xvi (with a query however). 



(3) Urobenus teres (Ude). 

 Anteus teres, Ude, Z. wiss. Zool., 1893, p. 59. 



Definition. Length, go mm.; diameter, ^mm.; number of segments, 100. Setae commence 

 in III ; those of ventral pairs of clitellum ornamented. Clitellum, XV-XXV. Male 

 pores XIX/XX. Gizzard in IX, X ; calcferous glands in XI. Hub. — Taquara, Rio 

 Grande do Sul. 



A remarkable peculiarity of this species is the backward position of the sperm- 

 sacs ; there are two pairs lying in segments xiii-xv. 



