PODARMUS PLOA. 47 



rating a presetal lip from a little less shorter postsetal lip. Between the apical Ups 

 the setae are inserted in vertical series and spread out in a conspicuously fan-hke 

 form. The notopodial lobe is represented by a low, rounded elevation and 

 bears no setae. Each dorsal cirrus is attached toward the base as usual; the 

 cirrophore is swollen, narrowed distad; the style is proximally rather stout, 

 evenly attenuated distad and reaching to near the tips of the longest setae and 

 in life probably exceeding them. The ventral cirrus attached distad of the middle 

 of parapodium ; short and subulate, not fully reaching end of neuropodium. 



Elytra all missing. Elytrophores cylindrical, of moderate length, fourteen 

 pairs inserted on the following somites: II, IV, V, VII and alternate segments 

 to the twenty tliii'd and then on XXVI and XXIX. 



The neuropodial setae are arranged in a vertical plane in which they spread 

 out more or less in fan-like manner. They are of two distinct types: a ventral 

 group of which the members are shorter and stouter, both proportionately and 

 actually, with the heads shorter and less slender at tip; and a dorsal group of 

 longer and more slender setae in which the heads are elongate and apically 

 slenderly drawn out. In setae of the ventral group the head is spear-shaped in 

 outline with the sides above the fusiform basal thickening first concave and then 

 nearly straight, till at the tip one side is convex and the other concave, the acute 

 tip bending over toward one side; on this side from base of head to tip are two 

 series of a few well-separated scales; no subapical tooth. (Plate 7, fig. 1, 2). 

 In the dorsal group the heads of the setae are much more narrow and elongate, 

 with above the series of scales a very long and slender essentially smooth tip 

 which is flexible and appears ordinarily more or less curved dorsad. (Plate 6, 

 fig. 6) . The two kinds of setae are typically about equal in nimaber, there being 

 fifteen of each, or a total of thirty in the parapodium of the type. The setae 

 of the first metastomial parapodia are shorter, with the heads less elongate, the 

 setae of the ventral type predominating. The acicula are small and neither pro- 

 trudes from the surface. 



Locality. Off North Cape: Easter Island. Sta. 4694 (lat. 26° 34' S., long. 

 108° 57' 30" W.). Surface. 22 December, 1904. Three specimens. The 

 specimens were fixed in Fleming's fluid. They are of varying sizes, and proba- 

 bly even the largest is not fully grown. 



This form has a similar general appearance to Harmopsides nans, a simi- 

 larly pelagic form. Both have similar comparatively short bodies with the 

 number of elytra correspondingly reduced. The present species in life was 

 doubtless transparent. The fixing of the types m Fleming's fluid, however, 

 blackened the tissues. 



