IIAPMOTHOE AREOLATA. 351 



or less thin and smooth ; then the small papillae stud the surface, and gradually increase 

 in size towards the posterior and outer edges. The border is formed of the long ridges 

 terminating in the marginal, blunt, spinous papilla. The smaller rounded bases of the 

 chitinous papillae internally are so closely arranged that they resemble the shields in 

 certain regions of an armadillo. Moreover, whereas in the first scales the chitinous lines 

 which bifurcate to form the triangular areas of the margin are simple, in the rest they 

 form a complex and continuous series of reticulations somewhat resembling those in the 

 skins of holothurians (Plate XXXIII, fig. 3). The minutely nodular or caespitose 

 condition of the chitinous spines is a marked feature throughout. The posterior 

 border has cilia of considerable length internally, then they diminish along the 

 posterior edge, again elongating on approaching the outer border, where they form a 

 long, dense fringe. The bulbous tip is minutely granular in its centre, and is continuous 

 with the central axis of the cilium. The under surface of the scale is iridescent, with a 

 well-marked scar for attachment somewhat nearer the outer than the inner border. The 

 scales separate readily. Occasionally a small patch of Gellejpora is found on a scale. 



Colour. — The dorsum has a light brownish or amber hue from the scales, the 

 posterior part of each of the latter being somewhat darker. The pinkish hue of the 

 body occasionally shines through these. The cirri are pale. The under surface is 

 iridescent bluish-pink, as in Polynoe scolopendrina. Ray Lankester speaks of the head as 

 being violet, and the palps deep madder-brown. In spirit they are dark greyish, streaked 

 with the lines of cilia. Towards the posterior end the dorsum has various transverse 

 streaks of dark greyish (in spirit). In rather more than the posterior third also a dark 

 touch occurs on each side of the base of the dorsal cirri, and there is a tendency for the 

 elevations in a line with the tubercles for the scales to have a touch of the same colour. 

 The pigment thus seems to be connected with the cirrigerous feet, and consequently is 

 best developed behind the last scale-tubercle. On the ventral surface the posterior 

 third presents dark pigment touches on the segmental eminences, and the tint increases 

 in depth posteriorly, spreading outward on the bases of the feet. A touch or two of 

 pigment also occur on the anterior folds of the mouth. 



Feet. — The modified dorsal bristles of the first foot have smooth tips. The second 

 foot is small, with a flipper- or paddle-shaped fleshy region dorsally, the inferior margin 

 terminating in the long papilla for the spine. The bristles, though short, are typical in 

 structure. The ventral division is somewhat conical, terminating in the pointed region 

 for the spine, and from the tip of this process a long cutaneous papilla projects. The 

 bristles are slender with elongated curved spinous tips. 



The third foot shows a considerable increase in the size of both dorsal and ventral 

 bristles. The ventral are still proportionally slender, but the majority have bifid tips, 

 only the lower short forms having simple tips. The ventral cirrus has large clavate cilia. 

 The papilla beyond the spine is present. 



The fourth foot approaches the typical condition except that the number of simple 

 bristles inferiorly is greater. 



In the typical foot (Plate XXX, fig. 3) the superior division has a somewhat con- 

 spicuous tuft of elongate, slightly curved bristles externally, and shorter and more curved 

 forms internally (Plate XXXIX, fig. 17). The spinous rows are dense. The tip has a 



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