74 SABBLLIDBS. 



and a small lanceolate process at the dorsal edge (Plate CXXIV, figs. 5 b and 5 b'). The 

 hooks have six prominent teeth, the distal region being tapered toivard the crown, and 

 the dorsal or posterior ontline has a marked incurvation above the base, whilst a deep 

 bay occurs below the lower tooth, and then a curved prow. In the largest example 

 (over 2 inches) from deep water the hooks remained true to the type, five large upper 

 teeth being followed by a smaller process above the prow. De St. Joseph mentions 

 seven teeth in the anterior hooks and six in the posterior. The anterior rows are 

 convex forward, but the posterior are nearly straight. 



After the bristles cease a small papilla indicates the site of the setigerous process, 

 and the papilla by-and-by projects posteriorly from a fused lamella which has a dorsal 

 and a ventral ridge, the latter being a modification of the connecting-ridge. The 

 uncinigerous lamella is bi-annulate, and remains so to the end. The last four or 

 eight feet, however, are modified, so that only the bi-annulate uncinigerous process 

 remains. 



The posterior border of the caudal segment is either crenate or smooth — according 

 to the conditions as regards reproduction. In those recently reproduced or in process of 

 reproduction it is crenate, but in entire examples it appears to be smooth. The cirri are 

 lateral in position and of considerable size. 



The tube is composed of mud with a lining of secretion, and has various fragments 

 of shells, spines of Spatangus, sand and minute pebbles adherent or mixed with the 

 mud. The inner secretion, when first exuded, and before being coated with mud and 

 debris, is very tough. The large example from 640 fathoms had its tube thickly coated 

 with mud only. In the Irish examples (S. W. Ireland, 1885) the fragments of shells 

 are embedded transversely in the thick muddy coating of the tube, giving it a heavy and 

 dense character. The tube is placed vertically in its native site. 



Gosse (1855) described this species as new, with interesting remarks on its habits in 

 confinement, and gave good figures. 



A careful and exhaustive description of this form is given by Fauvel (1897) both 

 in regard to external and internal structure, and is accompanied by excellent figures. 



The Amphicteis curvipalea of Claparede, 1 a form subsequently procured on the shores 

 of France by De St. Joseph and at Plymouth by Allen, 2 is, so far as can be made out 

 from the descriptions and an example sent for examination from Plymouth by Dr. Allen, 

 an average specimen of Amphicteis Gunneri, and Fauvel had previously come to the same 

 conclusion. 



Michaelsen is probably right in thinking Malmgren's Amphicteis sundevalli synonymous 

 with A. Gunneri. 



Genus CXL. — Sabellides, M. Edwards (char, emend.). 



Cephalic lobe subquadrangular with or without furrows, frontal edge elevated, 

 trapezoidal, anterior region arched, without grooves. Filiform tentacles with slender 



1 ' Annel. Nap. Suppl./ p. 132, pi. xiii, fig. 5. 



2 f Journ. M. B. A./ n.s., vol. viii, p. 230. 



