590 Memoirs of the Indian Museum. [Vol. V, 



in fig. o,A. The palps are very large and flat. The posterior dorsal tentacular cirri 

 are twice as long as the anterior dorsal pair, and reach back to the 3rd setigerous 

 segment. 



The armature of the pharynx (figs, 9A, 9B) is of considerable interest. The 

 maxillary ring has its full complement of teeth, but the basal ring is greatly reduced. 

 The arrangement is as follows : — 



Group I, 10 scattered unequal teeth. Group V, absent. 



„ II, 10-13 large curved teeth. ,, VI, one small tooth. 



„ III, transversely elongated band ', „ VII, > a single row of 7 minute 



of 50 teeth, in 4 rows. „ VIII, > teeth. 



,, IV, 10-12 large teeth. 



In group III the two middle rows of teeth are larger than those in the outer 

 rows. All the teeth on the maxillary ring are of the normal size and conical shape. 

 On the basal ring, however, they are rudimentary. Dorsally there are two small 

 pale paragnaths seated on rounded papillae (figs. 9A, 9c). Ventrally there is a single 

 row of 7 similar minute paragnaths. In two other specimens there were only 3 and 4 

 paragnaths respectively in the ventral row. These rudimentary paragnaths easily 

 fall off, and consequently some or all of them are frequently missing. The condition 

 of things characteristic of the sub-genus Ceratonereis is thus attained. The two 

 dorsal papillae can always be distinguished, even when the paragnaths have fallen 

 off. 



The jaws (fig. 9D) are slender, and have 15-16 teeth, an unusually large num- 

 ber. In a specimen from the Salt Lake at Dhappa, however, there are only 10 teeth 

 on each jaw. 



The feet gradually increase in size up to the 8th. The ist foot (fig. 9E, and text- 

 fig. 5«) has pointed dorsal and ventral cirri, equal in size and shorter than the 

 adjacent ligules. The latter are stout pointed lobes. The ventral division consists of 

 three slender lobes, two in front more or less completely surrounded by the fillet and 

 setae, the third behind the setae. The edges of the fillet are attached to the lower 

 anterior lobe. The setae are of three types. Above the spine there is a group consist- 

 ing in front of hemigomphs with rather short coarsely serrate tips, behind of homo- 

 gomphs with long slender finely serrate tips (fig. 9J). Below the spine the anterior and 

 ventral group consists of hemigomphs as in the anterior dorsal group. Behind the 

 spine is a group of hemigomphs with long finely serrate tips. The anterior hemi- 

 gomphs with coarsely serrate tips resemble those shown in fig. 9K, except that the 

 tips are shorter. 



The 2nd foot resembles the ist, except that it is larger and more glandular. In 

 the 3rd foot the dorsal division appears. It is deeply bifid, with a few slender homo- 

 gomphs. The 10th foot (fig. 9F, and text-fig. 56) has small clavate dorsal and ventral 

 cirri, much smaller than the adjacent ligules. The dorsal ligule is pointed and triangular 

 in shape, richly supplied with glands. The dorsal setigerous division consists of a 

 slender lobe lying in front of the dorsal setae The latter are homogomphs (fig. 9J) 



