196 Memoirs of the Indian Museum. [Vol. VII, 



The length of a chain of two individuals was from -47 to 7 mm., the diameter 

 15 mm. The head is relatively small in this species, and, as has previously been 

 described, the upper lip projects forwards in front of the mouth, forming a short 

 prostomium. There is a slight constriction between the pharyngeal region and the 

 rest of the body. The number of setae in the first bundle was five or six, in those 

 that follow four, and towards the hinder end three or fewer. I could not detect any 

 difference in the thickness of the terminal prongs (in a previous description I have 

 noted the distal prong as being the thinner) ; the length and other proportions are 

 the same as those I formerly gave (7). Chloragogen cells are absent on the crop. 

 n = 8, as before. 



Chaetogaster punjabensis, Stephenson (?). 



Nasratabad, Seistan, E. Persia ; water-channel in Consulate Garden. Nov. and Dec. 1918. 

 N. Annandale and S. W. Kemp. 



A single specimen was found among a number of examples of Nais communis var. 

 punjabensis in association with colonies of the Polyzoon Lophopodella (see below). 

 The association was no doubt quite fortuitous. 



Here again it is impossible to speak with certainty ; the small size, and distinct 

 and relatively long oesophagus of the specimen, are characteristics of C. punjabensis. 

 The numbers of setae per bundle appear to be rather smaller here, and I could not 

 follow the dorsal and ventral vessels forwards beyond the anterior end of the crop in 

 a glycerine mount of the specimen ; I also failed to distinguish any retractile body 

 in the cerebral ganglion, though this is a notable feature, at least of living speci- 

 mens. 



The specimen was in a late stage of sexual maturity ; the clitellum was present, 

 and there was a mass of ova in the middle of the body ; the animal was much swol- 

 len in this middle region. In the Punjab the Naid worms mostly become sexual at 

 the beginning of the hot weather, — April and May ; but this specimen was taken in 

 Seistan in the early part of the cold weather. 



Genus Nais. 

 Nais communis, Piguet var. punjabensis, Stephenson. 



Nasratabad, Seistan ; water-channel in Consulate Garden ; water fresh but turbid, bottom 

 niudd}^ with a scanty growth of weeds. Nov. and Dec. 1918. N. Annandale and S. W. Kemp. 

 Numerous specimens. 



Open pool in the reed-beds of the Hamun-i-Helmand, a few miles east of Lab-i-Baring, Seistan. 

 Water very slightly brackish, fairly clear, about five feet deep ; bottom muddy with a luxuriant 

 growth of Polamogeton pectinatus. 8-xii-1918. N. Annandale and S. W. Kemp. Three specimens. 



Peshawar. N.-W.F.P. ; on Limnaea acuminata. 12-i-1919. N. Annandale. A single speci- 

 men. 



Khandalla, W. Ghats; in algae on cliff kept wet by spray of a small waterfall. 1 7-9-ÜM918. 

 N. Annandale. Two tubes, five specimens in- one, four in the other. 



1 N. Annandale, Rec. Ind. Mus. XVI, p. 121 (1919). 



