Gatly Marine Luboratori/j St. Aiuhcws. 03 



The caudal process recalls the condition in the Opheliidie 

 just as the head, buccal region, and the first body-regiou 

 do those of the IJermellidse. Two segments without bristles 

 follow the last bristle-bundles, and then a constriction, the 

 anal process sharply curving centrally thereafter. In out- 

 line it is Mysoslomum-%\\ii^cA, having a convex obliquely 

 striated ventral surface and a concave transversely striated 

 dorsal surface, like a sucker, surrounded by a rim which is 

 notched and papillose, and terminating distally in a differ- 

 entiated flap ventral to the anus, and another freely movable 

 Hap of the same length dorsally. At the origin of the caudal 

 ])rocess three or four hooks occur ou each side of the median 

 dorsal groove. They have short, stout, striated shafts and 

 acutely curved tips, a few transverse striae also being present 

 liere and there ou the shaft, especially at the base. One or 

 two developing forms accompany the former. 



In a small variety from Norway (dredged by Canon 

 jSorinan) the dorsal flap has a distinctly papillose margin, 

 a condition also seen in tiiose from Naples. 



The anal funnel is, when tiie animal is removed from the 

 tube, carried at an angle, usually greater than a right angle, 

 to the caudal region, is rounded ventrally, flattened dorsally, 

 and with a spathulate valve hinged dorsally at the ti[). The 

 dorsal edges of the process are somewhat scalloped at the 

 base, one deep fissure being present, and each edge has four 

 small clavate papillae. The dorsal surface of the organ is 

 often expanded into a wide sucker with an obliquely ridged 

 centre and a free crenated edge. The apparatus would seem 

 to act as a powerful ejector. 



The tubes of the Neapolitan examples [Pectinaria neapoli- 

 tana) are remarkable for their coarseness and dark colour, 

 from the number of black sand-grains intermingled with 

 brown, yellow, and white. The sand in the intestines of the 

 specimens is equally dark. The tube, again, of a small 

 variety from Norway, Lophohelia-grouud, Driibak, 6-14 fath. 

 (Canon Norman), is formed of comparatively coarse frag- 

 ments — almost as coarse as those of Fetia pusil/a. 



Young examples, apparently of this form, occur frequently 

 in the bottom nets at the end of June and in July in St. 

 Andrews Bay. They occupy little transparent tubes, about 

 1 mm. in length, nearly straight and tapered posteriorly, 

 both ends being o])cn. This tube is composed solely of 

 secretion, and mimics the adult tube of sand-grains. The 

 posterior end of the tube presents a clear transparent 

 margin, then a granular belt, which is followed by somewhat 

 smaller reticulations than in front. The tube is fuither 



