Gatty Marine Laboratory, St. Andrews. 141 
opercula, seven pairs of anterior bristles, short pinne to the 
branchiz, the filaments of which had rather short, stumpy, 
terminal processes, and by the great number of small ova, 
which in some stretched far forward. ‘The number of the 
small ova far exceeded that seen in any other form, and 
point to their probable extrusion before fertilization, or, at 
any rate, immediately after. Sperms were not clearly 
demonstrated in frout, but they may have been present, 
though in one the ova passed forward to the anterior region. 
This form also shows the isolated and elliptical faecal balls 
in the posterior part of the gut. In structure the collar 
bristles correspond with those from St. Andrews. 
Station 16a. 195m. No. 202. 9.6.1908. 
Some had no opercula, others had two of the ordinary 
funnel-shape. In several without opercula the tips of the 
filaments were rather short and little tapered. In another 
the tips of the two dorsal filaments were flattened and wider 
than the rest. The number of the anterior bristles was 
seven pairs. 
One presented the same circular or rounded granular 
masses on each side of the gut in the caudal region. Others 
showed distinct ova (small). The former is probably the 
early condition of the latter. Instructure the collar-bristles 
agree with those from St. Andrews. 
Station 16a. 324m. 13.6.1908. 
. The examples have slightly larger tubes, more laxly put 
together, and often showing a lip where the annelid pro- 
trudes—that is, the edge of the tube is expanded a little and 
turned over. The annelids have no opercula, and rather long 
tapering tips to the branchiz, which also have long pinne. 
The collar-bristles have the same structure as those from 
St. Andrews. 
Station 18a. 324m. 13.6.1908. 
These have seven or eight pairs of anterior bristles, long 
branchiz, with transparent opercula, and long pinne on the 
filaments, which in those having opercula showed no enlarge- 
ment. In one about twenty of the terminal segments 
contained rounded granular bodies like early ova. In young 
forms seven pairs of anterior bristle-bundles occurred, and 
the branchiz had short pinne and thick filaments. The 
posterior region in these had between twenty and thirty 
segments. ‘lhe tips of the non-opercular filaments were 
rather long and tapered. In those with the granular masses 
posteriorly, no large ova could be seen. The aperture of 
