258 Prof. M'Intosh's Notes from the 



species. The foregoing, constitiuing tlie tlorsal division, is 

 separated by a considerable interval tVom the ventral division 

 ot" the toot, the intermediate region being occupied by the 

 branchial process. The inferior lamella is broadly lanceolate, 

 jiointed, and with the longer edge inferior. It is continuous 

 with the tieshy lobe of the foot, the tip of which slopes from 

 below upward and outward — the reverse of the arrangement 

 in the ui)i>er lobe. The fleshy part terminates su})eriorly in a 

 thickened adherent point. I'he long pale capillary bristles 

 pass out, similarly to the dorsal, close to the lamella, and 

 extend outwards about the same distance, and have the same 

 structure. A narrow fleshy ridge, corresponding to the foot 

 ])ro])cr, separates the capillary from the row of barred bristles 

 in Iront. The conical ventral cirrus is slightly flattened and 

 of moderate size. 



Common everywhere round the shores of Britain. 



The next species, Nephthys scolopendroides^ Delle Cliiaje, 

 is perhaps more generally known by other names, such as 

 N. Ilomhergii, And. & Ed., and A', assimilis, QErsted. It 

 extends from Kshetland to the Channel Islands, along both 

 shores, as well as to Ireland. The rectangular head is more 

 elongated than in N. civca, and the tentacles are more slender, 

 the posterior pair, as usual, being larger than the anterior. 

 The wide base of the inferior tentacular cirrus (Ehlers) merges 

 into the anterior lips. The body as a rule is smaller than that 

 of N. ccvca. Proboscis with a slightly longer terminal papilla 

 in the mid-dorsal line. The dorsal lamella of the toot is 

 broad and low, projecting beyond the tip of the foot; dorsal 

 cirrus short. Branchiae large, often curved inwards, and with 

 a process at the base, commencing on the flfth foot. Aion^uj- 

 shaped inner flap guards the base of the bristles, and another 

 (somewhat pointed) occurs at the tip of the foot. The lamella 

 of the ventral division is large, directed upwards and outwards, 

 and is broad and truncated at the tip. Ventral cirrus short 

 and broadly lanceolate. The serrate bristles are shorter than 

 in N, ccccGf have long shafts and an expanded blade bent 

 downwards at an angle and tapering somewhat quickly to a 

 delicate point. The barred bristles (anterior) approach those 

 of N. caca, the tips perhaps being shorter. 



The third form is Nephtltys ciliata, O. F. Miiller, a species 

 chiefly Zetlandic, though it stretches both to the American 

 and European shores of the North Atlantic. The head is 

 longer than broad, with a wide anterior border and more 

 slender tentacles than in N. cceca. In extrusion the proboscis 



