148 '^ENDEAVOUR " SCIENTIFIC RESULTS. 



The uncini are all alike, bvit those of the abdomen are 

 smaller. Seen from the side, each appears to have three 

 small teeth on the back of the main tooth, but from above 

 it is seen that there are three rows of testh (PI. xlvii., figs. 29- 

 30). 



The capilliform chaetae have curved points with a flange on 

 each side, of which that on the convex side is much broader 

 and longer than the other (PL xlvii., fig. 31). 



Remarks. — This worm agrees with Malmgren's^ diagnosis 

 of Scione, and though he makes no mention of the cutaneous 

 folds in his generic diagnosis he describes them for the species 

 S. lobata. 



Log. — Forty miles west of Kingston, South Australia, 30 

 fathoms. 



Family CAPITELLID.E. 



Genus Notomastus, Sars. 



NOTOMASTUS EISIGI, SJ). YIOV. 



(Plate xlvii., figs. 32-35.) 



A single specimen, somewhat curled and imperfect pos- 

 teriorly, was enclosed in the remains of a tube of sand and 

 shelly fragments. The incomplete worm measures about 

 36 mm. in length. 



The thorax, which measures 12 mm. in length, consists of 

 the usual twelve segments, bearing only capillary bristles. 

 The diameter increases from 2 mm. at the peristomium to 

 3 mm. at the sixth segment and then decreases to 2.5 mm. 

 at the twelfth. 



The prostomium is small, rounded, with a minute terminal 

 globular knob, and is retractile to some extent within the 

 peristomium. The peristomium is nearly twice the length 

 of one of the following segments, which are very glandular 

 and bi-annulate, the skin being cut uj) into the areas by 

 secondary fissures, as in the European species. (These two 

 facts are not shown in the figures.) The peristomium 

 is without chsetse, and I am unable to find any on the 

 following segment. If they are present they must be very 



1. Malmgren — Nordiska Hafs-annulaten, 1865, p. 383. Dr. Leiper 

 (Ann. Mag. Nat. Hist., 1908, p. 468) includes this in his list of Polychaete 

 generic names that are pre-occupied ; it will do no harm to retain it for 

 the present. 



