EUNICE VITTATA. 433 



for the anterior third or fourth of a pale brown colour, posteriorly of a pale flesh colour, 

 and so to the tip of the tail. The slightly madder-brown hue anteriorly is due to the 

 faint pigmentation of the general surface, but more particularly to brownish belts (red or 

 roseate, De St. Joseph), which cross the segments at their anterior border, and which 

 sharply define the segment-junctions. One of the striking characteristics is the presence 

 of a dark spot at the base of each foot, very distinct posteriorly. Ventral surface pale. 



The branchiae commence on the third foot as a simple filament or as two filaments, 

 though in those from the ' Porcupine ' some show three branches on this foot. On the tenth 

 foot are four divisions, on the twentieth five, the same number being on the thirtieth. 

 The fortieth has four, the fiftieth two, and the sixtieth one. The latter number occurs on 

 the seventieth and the eighty-seventh, the branchiae ceasing only in the last seventeen 

 or eighteen segments. Variations, however, are frequent. Claparede mentions that they 

 are ciliated, a feature rarely present in the Eunicidse. 



The body- wall in this form is less compact, both dorsal and ventral longitudinal 

 muscles being extended in transverse section. The nerve-area is within the circular coat, 

 having the basement-tissue, hypoderm, and cuticle externally. No neural canal is visible. 

 The oblique muscles are attached at the sides of the area. 



Proboscis. — The maxillae (Plate LXIII, fig. 3) are well developed, and have no shoulder 

 at their posterior articulation. The left great dental plate has nine or ten teeth, the right 

 ten ; azygos plate seven to ten ; left anterior plate six or seven, and the right ten teeth. 

 On each side in front of these is a brown nodule. A dark brown pigment-band marks the 

 articulation between the maxillae and the posterior processes, and passes down each side 

 of the articulation between them, and another curved band bounds the hind border of the 

 dental plates a little in front of the articulation. The posterior processes are somewhat 

 lobate in shape, usually with bluntly rounded posterior edges, the specimen figured being 

 exceptionally narrow and pointed. The mandibles (Plate LXIII, fig. 3 a) have an oblique 

 cutting edge, often with a gap. 



The first foot has a long dorsal cirrus, and a conical ventral lobe with two pale spines 

 and dorsal and ventral bristles. The second foot is similar to the first, only the setigerous 

 region is clearly differentiated from the ventral lobe (cirrus). The third foot has two pale 

 spines, and the setigerous region is more distinctly separated from the ventral lobe. The 

 dorsal cirrus is still long, and bears a single branchial filament, a condition Ehlers also found 

 in a large example, though he figures and describes the first branchia as having six 

 divisions. The condition, indeed, is variable, some of the British forms having one or 

 two, the latter being the number in the largest example (from Galway). 



The tenth foot (Plate LXXIV, fig. 10) has dorsally the cirrus, which is slightly 

 enlarged beyond the origin of the branchia at its base, and which has a tuft of simple 

 bristles, the tips of which pass to the dorsal border of the cirrus beyond the branchia, 

 which has four nearly equal divisions. The setigerous region beneath is bluntly conical, 

 the points of the two yellow spines projecting at the tip. Above the spines is the tuft of 

 simple bristles (Plate LXXXIII, fig. 7), slightly dilated at the commencement of the tip, 

 and finely serrated, no brush-shaped bristles being visible in the preparations. Beneath 

 the spines is the dense tuft of compound bristles (Plate LXXXIII, fig. 7 a), the shafts 

 being translucent, bevelled at the tip, and marked by striae directed downward and back- 



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