42 8 EUNICE FASCIATA. 



teriorly, the slender tail terminating in the amis, beneath which are two long cirri 

 variegated with white grains and olive-brown bars. 



The second segment is equal to about two and a-half of the succeeding, and has a 

 slightly projecting collar at each side anteriorly. A shield-shaped white spot occurs in 

 the centre of the anterior border, a smaller spot on each side, and another to the outer 

 side and a little in front of the last. A short subdivision (forming the footless 

 segment of some) bears the tentacular cirri posteriorly, and it has a considerable white 

 spot in the centre posteriorly and one on each side, the tentacular cirri springing from 

 the anterior border of these two. The spots and the tentacular cirri are pure white, 

 and the latter have about four olive-brown rings towards the distal half. Another white 

 patch occurs on the side beneath. The third segment is the type of the succeeding, 

 having a white spot in the centre of the dorsum, and three or four on each side (not on 

 the bases of the feet), so that three longitudinal rows occur on the dorsum anteriorly. In 

 this segment one or two whitish touches appear at the anterior border, and the speck in 

 the centre is pale. The rows of spots continue to the tail, and the lateral, which are less 

 white, also do so, though the general speckling of the dorsum renders them less marked. 

 The dorsal cirri are whitish and add considerably to the elegant aspect of the animal. 

 The ventral surface is uniformly iridescent pinkish throughout. 



A pale specimen between 8 and 9 ins. in length, procured between tide-marks in 

 Herm, shows only the anterior region of a faint reddish-brown. The rest is dull whitish 

 or greyish, with a reddish-brown streak from the intestine and blood-vessel. The whitish 

 marks throughout are also very indistinct. 



Proboscis. — The maxillaa (Plate LXII, fig. 10) are strong, moderately curved, and 

 of a chocolate hue, with a dark edge to the flange posteriorly, the appendages in the 

 rear being spatulate. The left maxillary plate has seven teeth, the right six. The 

 curved plate in front of the right has six teeth, and a dark brown chitinous process 

 supports it anteriorly. The accessory patch on the outer side has a single tooth. On the 

 left the curved plate has six distinct teeth and a horny inner edge not evidently den- 

 ticulated. The accessory outer plate has a simple conical edge. The left azygos plate 

 has seven or eight teeth. The mandibles (Plate LXII, fig. 10 a) have the anterior edge 

 sloped forward and outward, with a tooth at the inner third, and are slightly marked by 

 concentric lines. The limbs are pointed posteriorly. Occasionally a shelf-like flap 

 occurs below the cutting edge, as in the figure. 



The first branchial filament is simple and springs from the fourth bristled segment, 

 though slight variations are met with. It is attached to the inner base of the dorsal 

 cirrus. The next three segments have respectively two, three, and four divisions of the 

 branchial process, whilst the eighth foot has about eight divisions and the tenth about a 

 dozen. Some of the segments have branchias with fifteen divisions, forming a long 

 bright red semi-pinnate process of great beauty. Their maximum development takes 

 place in the anterior third of the body, so that at the fortieth foot they have diminished 

 to nine, at the fiftieth to five, and at the seventieth to three. Gradually diminishing they 

 are represented in the caudal region by a single filament as in front. 



The first foot has a long and rather thick dorsal cirrus, and a ventral lobe or cirrus 

 of a massive conical outline. The setigerous lobe is bluntly conical, with two pale spines. 



