SIPUNCULOIDEA. 



and the same internal structure as in E 2, together with closely similar papillae, 

 the retracted introvert is shorter than the body, 14 mm. : 11-5 mm. In El, 

 moreover, the dorsal retractors originate from a point half-way between the opening 

 of the segmental organ and the ventral retractor, while in E 2 they originate at a 

 position only one-third approximately (as in the other specimens) of the distance 

 between these two points. It is a little difficult to see how to deal with those 

 anomalies satisfactorily ; and I have preferred to consider these two provisionally 

 as within the limits of the present species. In two of the specimens I find the 

 segmental organs reaching about as far again beyond the insertion of the retractors. 

 A spindle muscle, not attached to the hind end, is generally present, though in one 

 or two cases I have not been quite able to decide as to its presence or absence. 

 In two cases I have found two distinct muscles attaching the front portion of the 

 gut to the body-wall; in the other cases I have seen no muscles at all, though it 

 seems quite possible that they may easily be torn, and so escape notice, in these small 

 specimens. 



The following list of localities and notes may be added : 



A. in specimens .... Winter Quarters. I. is. 03. No. 12 Hole. I) net. 



S. of Hut Point. 2.")-30 fins. 100 yds. 



B. 2 specimens ... 28. ii. 02. Up to In fins. 



C. 3 specimens .... ,. ll.xi. 02. I) net. Hut Point. 



