GaUij Marine Laburati))')/^ St. Andrews. 2.'>U 



is generally |)a|)illo.s(', witli Jistal rows (twcrity-t\v<j In luimhor) 

 of sk'Uflcr ('li)ii;;ato(l papilhc, of wliicli oacli row lias from 5-7. 

 A median cinus in front of tlic low.s in tliu mid-ilorsal lino. 

 Tlio body lias from 1)0-132 .segments or more. Foot witli 

 theilorsal lamcdla roundctl, its i^reatest vortical diameter beiii^ 

 median and its axi.s directed upwards. At the outer edge of 

 the foot is a smaller rounded himella. Dorsal cirrus slender 

 and lon^-. Branchial j)rocess of moderate length. Inferior 

 lobe sinuous below the small terminal lamella, with a small 

 papilla at the inner border of the latter superiorly. Ventral 

 cirrus hu<;e and conical. Bristles brownish, cjm[)aratively 

 short, the serrated forms havinu^ a distinct curvature of the 

 dilated region beyond the shaft and a serrated edge. The 

 barred forms are finely tapered. 



The fourth species, Xi'j>/i(/ii/s /ii/slricis, sp. n., comes 

 from Berehaven (Royal Irish Academy's Ex[)edition), from 

 various stations in the Mediterranean during the ' Porcupine ' 

 Expedition of 1870, and a closely allied, if not identical, form 

 was obtained by Canon Norman otf Bergen. The head is 

 elongated from before backward, with rather pointed subulate 

 tentacles anteriorly, the broatler second i)air following afcer an 

 interval. Peristomial segment veutrally with two broad flaps 

 and a symmetrical series of furrows. Body resembling that 

 of A', cilinta. Proboscis comparatively short, with slender 

 papilhe in twenty-two rows. The mid-dorsal pair converge 

 on the long tentacle immediately in front, and the rows on 

 each side of the mid-ventral line converge in a more marked 

 manner; but there is no median filament. As a rule four 

 pa|)illaj occur in each row, but in some there are traces of a 

 tilth, and in the ventral pair (on each side of the median line) 

 six short papilla?. Foot with a long, little elevated, dorsal 

 lamella, \Yhich does not extend so far outward or droop at the 

 tip as in N. ncolopendroiiles. It a[)i)roaches in form the foot 

 of y. ci/iatUf but differs in the shape of the dorsal lamella and 

 in the fact that in front of the capillary bristles the spinigerous 

 region forms a low cone with the spine at the apex, the barred 

 bristles arising in the fissure between it and a large flap or 

 lamella formed by the fillet guarding the bristles, whereas in 

 A"^. ciliala the spinigerous region itself forms the free flap. 

 The dorsal cirrus is somewhat thick, separated only by a 

 shallow nctch fr(»m the branchia, which is of moderate size, 

 has a [)apiila at its outer base, and is cnrved outward. Bristles 

 similar to those of A', scolvpendroidesy but thinner. Inferior 

 division of the foot with a small lamella posteriorly, another 

 nearly as j)rominent formed by the fillet for the barred bristles, 



17* 



