142 Prof. M'lntosli'a Notes from the 



the tube is in some expanded a little and turned over. The 

 structure of the collar-bristles is precisely the same as in 

 the St. Andrews examples. 



Station 18fl. 455 m. 18.6.1906. 



The tips of the branchial filaments are enlarged as flattened 

 lobate processes in every instance, and in several the ex- 

 pansion passed down the filament for some distance. The 

 pinnre on these filaments were all rather long and slender, 

 and in marked contrast, for instance, to those from Plymouth, 

 in which the short thick pinnaB are diagnostic, the whole 

 branchial apparatus being less developed. The great h-ngtli 

 and the number of the pinnpe in the form from the North 

 Sea give the branchife a densely capillary aspect. As a rule, 

 the terminal pinnpe are shorter and thicker, partly, in all 

 probability, fro;n more active growth. Besides the examples 

 Just mentioned others siiowed similar enlargements at the 

 ti[)S of the filaments and no opercula ; whilst in a third series 

 a minute, flattened, or slightly saucer-shaped operculum 

 appeared on each dorsal filament. Such could have been of 

 no service as a protection. The structure of the collar- 

 bristles of these specimens corresponds exactly with that of 

 the St. Andrews form. 



Station — . Off Moowick Head, 99 m. No. 165. Cap- 

 tured in trawl. 12.8.1908. 



All these presented the rounded granular masses (early 

 ova) oil each side in the caudal region, and no ova in front. 

 0|)ercuia were present, and seven or eight pairs of anterior 

 bristles. In structure the collar-bristles agree with St. 

 Andrews examples. 



Station — . 15.8.1908. 



Those examined had two opercula and no enlai*gcments 

 at the tips of the branchial filaments. The anterior bristles 

 were seven or eight, the young having fewer. The collar- 

 bristles agree with those from St. Andrews. 



' Porcupine,^ 1870. 45 fms. off Cape Sagres. 



In these examples the branchise are of moderate length 

 (about that of the specimens from Plymouth) and furnished 

 with two well-formed opercula. The pinna? are .somewhat 

 more slender than those from Plymouth. Moreover, most 

 or all of the opercula had a little process on the edge of 

 the comparatively large organ. The rest of the filaments 

 ended in a tapering tip. There weie eight pairs of anterior 

 bristles. The collar-bristles are minute and transparent, but 

 the basal rcijion of the win"; is differentiated and serrated as 



