Catty Marine Laboratory, St. Andrews. 141 



opciciilji, seven pairs of anterior l)ri.stles, short piunic to the 

 hraiuhiie, the lilanieiits of which had rather short, stumpy, 

 terminal processes, and hy tlie gnat nmnhcr of small ova, 

 which in some stretched far forward. The number of the 

 small ova far cxceedetl that seen in any other form, and 

 point to their ])rol)al)le extrusion l)efore tertiliz.ition, or, at 

 any rate, immediately after. Sperms were not clearly 

 demonstrated in front, but they m;iy have l)ccn [)resent, 

 thi)Uj;;h in one the ova passed forward to the anterior region. 

 This form also shows the isolated and elliptical iu3C.il balls 

 in the posterior part of the gut. In structure the coU.ir 

 bristles correspond with those from St. Andrews. 



Station 16 a. 195 m. No. 202. 9.6.1908. 



Some had no opcrcula, oiiicrs had two of the ordinary 

 funnel-sh.ipe. In sever. d without o[)ercula the tips of the 

 til nnents were rather short anil little tipercd. In another 

 the tij)s of the two dorsal filaments were H.itteued 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 thec.iudal region. Others 

 showed distinct ova (small). The former is probably the 

 early condition of the latter. In structure the collar-bristles 

 agree with ihobc from St. Andrews. 



Station 16 ff. 324 m. 13.6.1908. 



Tlie examples have slightly l.irger 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 annelitls have no opcrcula, and rather long 

 ta|)ering tips to the branchiic, which also have long pinnse. 

 The collar-bristles have the same structure as those from 

 St. Andrews. 



Station 18 o. 324 m. l.'J. 0.1908. 



These have seven or eight pairs of anterior bristles, long 

 l;ran(hiie, with transparent opereula, and long piunaj on the 

 Hlameuts, which in those having oi)creula showed no enlarge- 

 ment. In one about twenty of the terminal segnu-nts 

 contained rounded granular bodies like early ova. In voung 

 forms seven pairs ot anterior Ijrisilc-bundles occurred, and 

 the branchiie had short pinn;e and thick tilaments. The 

 posterior region in these had between twenty and thirty 

 segments. The tips of the non- opercular filaments were 

 rather long atul tapered. In those with the granular massis 

 posteriorly, no large umx could be seen. The aj)crture of 



