POLYNOIDAE 99 



border of the scale there are a few smaller, but still large, roughly capstan-shaped, 

 echinate tubercles (Fig. 10 d) and dotted all over the scale there are numerous small 

 disk-shaped tubercles (Fig. 10 e). These are sparse in the front region of the scale. 



On the back in the median line there is a longitudinal row of small, very soft pads. 

 The ist chaetiger has a single conical pad. In the 2nd chaetiger the pad shows signs of 

 dividing into two pads lying side by side, for there are two cones arising from a single 

 base. The following four chaetigers have two pairs of pads, one pair behind the other 

 and the members of each pair lying side by side. Behind the sixth foot this arrangement 

 in pairs ceases and the pads are continued in a somewhat irregular fashion to the end of 

 the body. 



Branchiae are present from the 3rd chaetiger. They are small branching structures 

 lying on the hinder face of the feet on a level with the outer edge of the elytrophores. 

 In addition there are two or three minute globular processes, possibly branchial in 

 function, lying on the front and hinder faces of the elytrophores and of the corresponding 

 structures in the cirrigerous segments (Fig. 10/). These last are provided with low 

 oblong cushions running from the beginning of the foot to a point on a level with the 

 inner edge of the elytrophores. To the inner edge of these cushions there are attached 

 roughly fan-shaped flaps or membranes, the inner edge of which lies up against the 

 sides of the median dorsal pads. They are what Seidler has named pseudo-elytra 

 (Fig. 10 g). They are smooth on the dorsal surface, thin and transparent. On the under 

 side they are provided with six raised ridges apparently muscular in character which 

 exactly overlie corresponding dorso-ventral muscular ridges on the back. In addition 

 the under surface carries about a dozen rows of small vesicles which are apparently 

 glandular. The function of these organs is to me quite unknown. 



The feet (Fig. 10 h) are triangular in outline. The dorsal cirri are long and slender, 

 extending beyond the tips of the bristles. The ventral cirri are short and stout, barely 

 reaching to the end of the foot. They taper to a point. Both dorsal and ventral cirri are 

 smooth, but the feet, except on their upper surface, and indeed the whole of the under 

 surface of the body, are covered with short clavate papillae with large heads. The notopod 

 forms a small rounded lobe on the anterior face of the foot. It is supported by an aci- 

 culum and carries numerous, exceedingly fine, hair-like, barbed bristles (Fig. 10 i). 

 The triangular neuropod carries a narrow fan-shaped bundle of about 1 5 completely 

 smooth, stout, acicular bristles (Fig. 10 k). Not only is there no trace of ornamentation 

 but there is scarcely any sign of curvature at the tip. In addition to these bristles there 

 are at the base of the bundle one or two shorter bristles with lanceolate heads (Fig. 10 /). 

 In the first foot the neuropod is much reduced and is only slightly larger than the noto- 

 pod. The notopodial bristles are very numerous, but the neuropod carries only three or 

 four bristles similar in type to those of the normal feet but much more slender. 



Small nephridial papillae are apparent from the 4th chaetiger. The terminal segment 

 carries a single pair of pygidial styles. 



Remarks. The only species with which, to the best of my knowledge, the present 

 curious form is congeneric is Euphione lobulata, Seidler (1921, p. 89, and 1924, p. 99) 



