Polychaeta. 279 



translucent hypodermal pustules are of varying sizes, irregular in 

 their distribution, larger and more abundant than in the specimens 

 of Thelepus cincinnatus which I have examined. 



The tori uncinigeri commence on the third setigerous segment, 

 and thereafter the tori and capillary fascicles co-exist to the end of 

 the specimen (and of the body, Kinl)erg), there being no mutation of 

 segments in regard to the distribution of setae, except that the tori 

 become more pro-eminent in the abdominal segments, while the 

 dorsal capillary fascicles suffer a slight reduction. 



The simple filiform branchiae are more numerous on the second 

 than on the third segment, the latter being the first setigerous 

 segment. 



The specimen offered certain chaetographical abnormalities. In 

 the nineteenth setigerous segment there was no torus on the left side ; 

 the twenty-fourth and twenty-fifth -pliardrac {notopodium and neuro- 

 Ijoclium) of the right side had no antimeres on the left side ; finally, 

 the twenty-fifth right capillary fascicle was not subtended by the 

 usual torus. 



The uncini are uniserial throughout and exactly resemble those 

 of Tkelepus cincinnatus figured by von Marenzeller,^ being charac- 

 terised by rhe presence of two rows of accessory uncinules at the 

 vertex and by a rounded process {mucro) at the distal end of the 

 basal portion. 



NiCOLEA. 



Malmgren, 1865, op. ciL, p. 380. 



Branchiae arborescentes, paria duo ; fasciculi setarum capillarium a segmento 

 quarto [/.e. first postbranchial] incipieutes, in segmentis circa XV-XVII obvii. 



The relations of this genus to the Phyzclia of Savigny, Quatrefages 

 and Kinberg have been dealt with by the Baron de St. Joseph.^ 



14. ISTlCOLEA AGASSIZI. 



. (PI. XLV., fig. 5.) 



Phyzelia agassizi, Kinberg, 1866, op. cit., p. 345. 

 Nicolea agassizi (Kbg.), Ehlers, 1897, op. cit., p. 132. 



The collection contains five specimens taken off Franklin Island 

 in 10 fathoms and Cape Adare in 20 to 24 fathoms. The larger 



1 Marenzeller, F. von, 1884:. ' Zur Kenntniss der adriatischen Anneliden,' III. 

 S.-B. Akad. Wien, Bd. 89, p. 206. 



2 4nn. Sci. Nut. (7th Ser.), T. XYIL, p. 180 et seq. 



