196 



DISCOVERY REPORTS 



separated throughout in the mid-ventral Hne. There are six pairs of nephridia, extending 

 from the 3rd to the 8th segment. As in P. calieridrum they decrease in size from the 

 first to the third pairs: the remainder are of equal size and smaller than the 3rd pair. 

 There are several ripe females among the specimens, and these have rounded 

 glandular orifices below the bristles in the 6th, 7th and 8th segments. 



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a 



Fig. 81. Poly cirrus hesslei. 



a. Ventral view of anterior end. The tentacles have been pushed back to show the cephaHc lobe. 



b. Dorsal bristle, c. Hooks. 



The bristles begin on the 2nd segment and there are 13 notopods with cirriform 

 processes. The uncini begin at the 14th chaetiger. The dorsal bristles (Fig. 81, b) are 

 long and slender and very thinly bordered. Under a one-twelfth objective, they appear 

 to have finely hirsute edges, which I hesitate to describe as a true denticulation. The 

 abdominal hooks (Fig. 81, c) have above the main fang a single tooth surmounted by a 

 row of about six denticles. The intestine is filled with sand. 



Remarks. This form is clearly separated from P. kergiielensis by the character of its 

 dorsal bristles: it is nearer to Gravier's P. insignis, but differs from it in a number of 



