Gatty }[<iiiiic Lahoratoiyj S(. Andrews. 2Gi 



Inmclla is narrowed at its atlaclmiciit, Ijruadcr and somcwiiat 

 truncated di.>>tally, the rcver.se bein;^ tlio ca.sc in ^V. lonrjt.se(os(i. 

 Instead ot' a distinct flap externally only a trace in the shape 

 of a fillet occurs. The dorsal cirrua is less, while the branchia 

 is ioniser, though it is likewise curved inward. The spini- 

 gerous lobe is produced further outwards as a pointed process 

 and has a difVorent angle. ]\Ioreover, the fillet guarding the 

 larrcd bristles is convex upwanls. In the inferior division 

 the posterior lamella is considerably smaller, the spiiiigcnnis 

 lobe is longer and more acute, whilst anteriorly the upper 

 fillet is smaller. The ventral cirrus is smaller and less tapered 

 than in JV. loiufisetosa. lioth barred and slender bristles are 

 more slender tluin in the latter species, though in both the 

 transverse l)ars of tiie cameratcil bristles extend downward 

 till the full diameter of the shaft is reached. 



The seventh torm is J^'ep/it/ii/s Ju/mstoni, Elders, which has 

 a shield-shaped head, a broad and somewhat convex anterior 

 border, a slender tapering tentacle at each angle, and an 

 oblique translucent j)atch at its base internally. The second 

 pair occur after a considerable interval. The proboscis has 

 rather long rows of pa|)illie distally and a median cirrus 

 dorsally and ventrally. Between the rows at the aperture is 

 a simple papilla dorsally aiul ventrally. The anterior folds 

 or lips in front of the mouth are large. Tiie dorsal lamella 

 has a similar curvature to that of N. ciliata, but it extends 

 further outward, and only a trace of the rounded terminal 

 lobe appears. The setigerous region stands up prominently 

 and is smoothly rounded externally. No free flap to the 

 anterior fillet guards the barred bristles. The dorsal cirrus is 

 a variable filiform process. The branchia is not large and is 

 coiled externally. The ventral lamella is large and ovato- 

 lanceolate, and the ventral cirrus is lanceolate, larger than in 

 iV. ci/iata, considerably less than in aV. loiujisetosa. The 

 cajtillary bristles are longer and less rigid than in the latter, 

 and the serrations are very fine, the long distal region being 

 smooth. The barred region in the anterior bristles is long 

 and slightly fusiform. 



Sepldliijs cirrosa, Elders (18G<S), is the eighth Britisli 

 species, characterized by a seven-sided head, longer than 

 broad, with a pair of conical tentacles in front and a longer 

 latcro-Ycntral pair alter a considerable interval. A small 

 paj)illa (sensory) lies on each side of the head posteriorly. 

 Proboscis with tlie normal rows (twenty-two) of rather long 

 pa|>ilUe, each row having six or more papilUe. Shorter 



