44 Trof. M'lntosh's Notes from the 



Sars, eight miles off Cape Sagres in 45 fathoms, off Cape 

 Guardia. and nine miles off Cape Finisterre in 81 fathoms. 



Amphitriie ajfiuis, ^Malnigren, whieh extends from Ireland 

 (Southern) into the Atlantic, where it was dredged hy the 

 'Knight Errant' at Station 11, J^3rd August, 1882, in 555 

 fathoms. There is a \vell-marl\ed dorsal collar without eye- 

 specks in the preparation, and which laterally folds round to 

 join the supra-oral plate, which is somewhat scoop-shaped 

 and only moderately prominent. The tentacles appear to be 

 normal. The body is typical, so far as it goes, and rounded 

 dorsally, whilst ventrally are tAvelve distinct shields and 

 several rudimentary ones posteriorly. Behind the mouth is 

 a transverse shield, which doisally joins the smooth region 

 behind the collar. Two segments with ventral shields follow, 

 the dorsal edge of the first passing to the base of the first 

 branchia, whilst the dorsal edge of the second falls short of 

 its branchia. A still larger gaj) separates the first bristle- 

 tuft of the next segment Irom the third branchia. Behind 

 the shields a deep groove occupies the ventral median line. 



The branehite are three in number, proportionally small, 

 and with short and rather thick terminal divisions. The 

 first has a short stem, which splits, each branch carrying 

 a few short filaments, some M'ith bifid tips. The sec(md is a 

 little less, and the third is again still less. Both sides are 

 alike. There are seventeen pairs of biistle-tufts, the first 

 commencing oi)posite the third branchia. The i)ristles are 

 pale golden, the shaft being deeply inserted in the tissues, 

 only a short free portion occurring below the wings, 

 which are narrow and soon cease, the translucent tip 

 beyond being flattened like along knife-blade, boldly serrated, 

 at the edge, and tapered into a very long hair-like tip. One 

 or two shorter forms occur amongst the others, but 

 apparently no regular series as in other genera, and the}' are 

 probal)ly developing long bristles. In these little of the 

 winged region projects beyond the surface, and the flattened 

 blade beyond is occasionally split into spikes. Amongst 

 the bristles are long curved forms with narrow wings and 

 finely tapered tips. 



The hooks (PI. III. fig. 2), when fully developed, form a 

 double low, the large fang facing that ot' the opposite hook. 

 The base is comparatively small and the crown and neck 

 large. The crown presents in lateral view three teeth above 

 the main fang, Avhieli is long and sharp. The posterior 

 border is convex and a marked heel occurs as it joins the 

 base. The curve below the main fang has a median process, 

 and beyond it is an abrupt bend, whilst the anterior process 



