12 NEPHTHYS (LECA. 



The peristomial segment is peculiarly flattened, and separated dorsally by a more 

 distinct lateral cleft. It bears dorsally a foot-papilla with a spine and a palisade of barred 

 bristles (curved backward) in front, and a line of slender elongate simple bristles behind 

 the spine. To the exterior is a flattened dorsal cirrus with a subulate tip. Below and 

 slightly in front of the foregoing is a tuft of simple, slender and straight bristles which 

 taper to a point, while at the outer border is a short cirrus — flattened like the foregoing 

 and with its upper basal edge slightly extended or bulging. The two cirri form the 

 tentacular cirri of E biers. 



The second foot presents well-marked dorsal and ventral divisions, though smaller 

 than in the typical form. Dorsally the end of the spine is in the centre of a rounded 

 area or papilla which has in front a backwardly curved row of long barred bristles of large 

 size and with long filiform tips. On the posterior curve of the papilla is a row of long 

 tapering bristles of the same type as the serrated forms, but the serrations have not yet 

 attained distinctness, though traces are visible. They also curve backward. A short 

 cirrus flattened especially at the base arises from the posterior and outer edge of the 

 division. A small lamella with a free edge passes from the inner border of the spine- 

 papilla. The inferior division has a broadly lanceolate lamella of smaller size than in the 

 succeeding feet, but is similar in outline. The somewhat flattened ventral cirrus occurs 

 at its inferior border. The fleshy part of the foot terminates superiorly, in front of the 

 foregoing, in a short blunt cone. The long tapering bristles, with slightly flattened blades 

 above the shaft, hold their normal position in front of the lamella, while the barred kind 

 — still with long hair-like tips — form an anterior row separated from them by the spine- 

 papilla. 



The third foot has superiorly a somewhat elongated fan-like lamella to the inner side 

 of the lanceolate and flattened dorsal cirrus. The bristles have the same disposition — the 

 anterior barred forms being long and curved backward. The small lamella to the inner 

 border of the spine-papilla is better marked than in the former foot. The dorsal cirrus 

 is much flattened and of irregular outline, being bifid at the tip and extended at its outer 

 and basal edge. The inferior division has a larger lamella, and the ventral cirrus is 

 lanceolate. The fourth foot shows the branchial lamella dependent from the lower edge 

 of the base of the dorsal cirrus. It is a comparatively small process, but has the character- 

 istic hook-like curve. The dorsal cirri diminish in size while the branchiae and lamellae 

 increase from before backward. 



Anteriorly the typical foot (Plate LXVI, figs. 1 and 2) presents a large fan-shaped 

 lamella projecting like a crest from the posterior border of the upper division, its free 

 inferior edge coming off at a blunt angle from the outer. The fleshy base of the foot, with 

 the posterior part of which this is continuous, slopes from above downward and outward, 

 and terminates in a rounded disc or lobe above the cirrus. Immediately below is a short 

 tapering cirrus, and after an interval or notch the hook-shaped branchial process, which is 

 of moderate length and has a slight papilla at the base externally. A semi-circular flap 

 lies over the base of the branchial process anteriorly, being the inferior termination of the 

 flattened lamina between the two rows of bristles. No free flap guarding the camerated 

 bristles anteriorly occurs in this species. In front of the lamella is a row of pale elongate 



