i68 



DISCOVERY REPORTS 



nuchal pits. Apart from the prostomium the surface of the body is granular or finely 

 vesicular ; and as described by Chamberlin for Kesiin fimis, each annulus is marked by 

 a row of fine but distinct vesicular papillae. There is no trace of gills. 



In the anterior portion of the body the bristle bundles are borne on small papillae, 

 and above and below the foot are one or two papillae much larger than the other 

 papillae of the middle annulus (Fig. 69, b). From about the 12th chaetiger all the papillae 



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O 



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O^ 



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a 



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Fig. 69. Kesun abyssorum. 

 a. Entire specimen, b. 8th chaetiger. c. Terminal segments from the side. 



of the middle ring increase in size till they equal the papillae lying above and below 

 the foot. Consequently, for the last ten segments, the bristle bundles lie in a deep 

 groove (Fig. 69, c), the sides of which are formed by the annulus in which the feet lie. 

 The terminal segments are uniannulate. The lateral prominences so conspicuous in 

 Travisia are wholly absent. 



From the 6th to the 9th chaetigers inclusive, there is on each side below the foot 

 an enormous oval nephridiopore, the vertical diameter of which is about equal to the 

 distance between the bristle bundles. Between the bristle bundles sensory pits are 



