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Records of the Indian Museum. 



[VOL. X, 



there were no previous observations on the budding zone) the 

 number turns out to be the same as in Pristina. The genital 

 organs of Naidium have not so far been described ; but since in 

 Pristina their exceptional position in segments vii-viii (two 

 segments further back than usual) is correlated with the presence 

 of the two additional segments produced in the budding zone, it 

 seems not improbable that the same will hereafter be found to be 

 the case in Naidium also. 



Dero limosa, Leidy. 



This species was found at Lahore by my pupil Mohammed 

 Afzal Husain, who kindly gave me a number of living specimens, 

 in October, 1912. > 



The worms are about 6 mm. long, fihform, and pale grey in 

 colour. When disturbed . they often execute wriggling movements 



Fig. 6. — Posterior end of Dero limosa. 



like those of insect larvae ; in trying to escape from under a cover- 

 glass they may progress with the posterior end in advance. Of 

 the specimens submitted to examination, none were undergoing 

 asexual division. 



The prostomimn is bluntly conical. The number of segments 

 is 47, 48 or 49. plus an undifferentiated region posteriorly in 

 which setae are not yet developed. A feature of the Lahore speci- 

 mens of this species is the occurrence of a number of segmentally 

 arranged bright orange- coloured spots, due to a granular pigment 

 in the surface epithelium and superficial to the muscular layer of 

 the body- wall. They are situated on each side slightly ventral to, 

 and approximately in the same vertical plane as, the insertion 

 of the dorsal setal bundles. Their distribution is rather variable; 

 they are perhaps usually best marked in the anterior segments, 



