(o"^^ MR. F. E. BKDDARl) ON NEW [DcC. 20, 



iv., v., vi. are triannulate, the middle annulus being much the 

 narrowest ; segments vii., viii., is. are very much wider (antero- 

 posteriorly), but still triannulate ; so, too, are the segments which 

 immediately follow, though much narrower. After the clitellum 

 the segments continue to be triannulate. 



The clitellum extends from segments xiii.-xix. ; it is at first com- 

 plete, extending right round the body ; but on segments xvi.-xix. 

 there is a ventral median area without any glandular modification. 



The atrial pores are upon very conspicuous papillae ; the two of 

 each side of the body are connected by a longitudinal groove, which 

 is not straight but has a semicircular outline, the convexity being 

 dorsal. The oviducal pores are just in front of the ventralmost seta. 

 The setse are rather distant from each other ; a somewhat greater 

 distance separates the two lateral setse. 



I have not seen any dorsal pores. 



The pharynx occupies the first four segments of the body ; the 

 gizzard is very elongated, with parallel margins ; it measures 6*5 mm. 

 in length ; the gizzard occupies two complete segments, the fifth and 

 the sixth. The oesophagus bears in segment xvii. the single pair of 

 calciferous glands, which present the appearance of an oval swelling of 

 the oesophagus itself. The intestine commences in the xixth segment. 



The septa of some of the anterior segments are, as is so constantly 

 the case with Earthworms, strengthened and bound together with 

 thin muscular strips which occasionally pass through one septum 

 to reach another lying behind it ; the number and appearance of 

 these septa is illustrated in the accompanying drawing (woodcut, 

 fig. 2, p. 673). The first septum, which is thin and transparent, 

 divides segments iv./v. ; it is traversed by a large number of muscular 

 threads which bind the pharynx to the parietes : the next septum is 

 also thin and delicate in texture ; it is attached at the end of the first 

 third of the gizzard ; a good number of the threads which bind the 

 pharynx to the parietes pass through it. The following seven septa 

 are thickened ; the last of them therefore bounds the thirteenth 

 segment anteriorly. 



The dorsal vessel is completely double ; the two tubes of which 

 it is composed retain their individuality where they pass through 

 the intersegmental septa. The dorsal vessel is, however, at first 

 a single tube ; it is not until the seventh segment that it becomes 

 double. In this segment commences the supra-intestinal vessel, 

 which is large and very conspicuous. In segments x., xi., xii., xiii« 

 are the four pairs of dilated hearts; in a few segments, anterior to 

 the tenth, are more delicate peri-cesophageal vessels. 



There are, as in Octochcetus multiporus, a pair of large nephridia 

 lying close against (in front of) the first septum ; from each of 

 these a slender duct was traced forwards which opens, it may be 

 inferred, into the buccal cavity ; I did not, however, succeed in 

 seeing the actual orifice. In the rest of the body the nephridia are 

 also constructed upon the plan which is characteristic of OctocJicetus 

 multiporus ; the tufts appear to be massed chiefly round the setse. 



Both testes and ovaries occupy the usual segments, but the gonads 



