80 AMAGE AURICULA. 



lateral, and project from the region as long processes sloping outward and backward. 

 Bach bristle-tuft lias a longer and a shorter series of translucent bristles with slightly 

 curved tips furnished with somewhat narrow wings (Plate CXXIV, fig. 6). The shaft 

 is minutely striated longitudinally, and widens a little as it approaches the tip. 



The hooks (Plate CXXIV, fig. 6 a) have a somewhat triangular outline from the 

 breadth of the slightly sinuous crown. 'The posterior outline curves to the rounded 

 prow which is carried to the line of the teeth. The first tooth is as large as the second 

 and the two following are similar, the last being slightly broader at the base from the 

 curve of the gulf between it and the prow. Most of the hooks have five teeth, though 

 occasionally the larger have six, whilst some in the centre of the row may have only four 

 teeth. The posterior hooks are smaller, but they have the same form and structure. 

 Moreover the- papillae or lamellae on which they occur are the only processes posteriorly, 

 and are twelve to thirteen in number. 



The tube is not mentioned by Malmgren, but is composed of a lining of tough 

 secretion with a few sand-grains and free shreds of mucus, which give it the aspect of 

 being coated with minute algae. 



Reproduction. — The larger example from St. Magnus Bay in July appears to be a 

 female with large ova. 



The Sahellides adspersa of Grube l from Lussin Piccolo in the Adriatic seems to be 

 a closely allied form. 



Genus CXLII. — Amagk, Malmgren, 1865. 



Cephalic lobe sloping downward anteriorly, twice as broad as long, transversely 

 truncate posteriorly, and with two prominent papillae as if bifid, supported by glandular 

 fillets of the peristomium. Tentacles filiform, smooth. Tentacular membrane trilobed, 

 and with two glanular bands. Four subulate branchiae fixed on each side of the third 

 and fourth segments. Anal segment with two cirri ; stomach has a blind sac. Nephridia 

 with short, wide tubes, and the anterior are less than the posterior, which extend into 

 the fifth segment. 



Setigerous processes commence on the third segment (on which they are small), 

 and are fourteen in number. Rows of hooks from the sixth segment to the penultimate 

 segment. Oval papillae above the hooks and bristles in the posterior segments. Capillary 

 bristles with very narrow wings, and tapered, slightly curved tips. Hooks pectiniform, 

 sub-triangular, 4 — 5 toothed. 



1. Amage auricula, Malmgren, 1865. Plate CXVIII, fig. 10— body ; Plate CXXIV, 

 figs. 8 — 8 b— bristle and hooks; Plate CXXV — dorsal view, anterior end. 



Specific Characters. — Cephalic region somewhat broad, and bent downward, the 

 prostomium being bifid ; supported laterally and posteriorly by the fillets of the 



1 < Arch. f. Naturg./ xxix, p. 57, Tab. vi, fig. 2, 1863 ; and ' Jahresb. Scliles. Gesell./ 1871, p. 80. 



