32G PEECY SLA DEN TRUST EXPEDITION. 



Genus PALMYROPSIS, iiov. 



Body short, consisting of comparatively few segments. Head with sessile eyes, a 

 single tentacle, and a pair of large tapering palps. First segment so revolved as to 

 completely enclose part of head, so that a palea-bearing region is intercalated between 

 tent;icle and palps. Notopodium with palese and few capillary setae, latter often 

 entirely wanting. Neuropodium with simple furcate setaj only. Elytra apparently 

 absent; dorsal cirri borne on segments 1, 2 — 5, and all alternate ones to end. 



1. Pahvyropsis macintoshi*, sp. n. (Trans. Linn. Soc, ser. 2, Zool. xii. (1909) 

 Plate 45. fig. 18; Plate 46. figs. 21, 22.) 



Measurements. Length 12 mm., breadth (without palese) 4 mm. ; no. of segments 23. 



Body almost square in cross-section, tapering slightly and equally at both ends. Head 

 (PI. 45. fig. 18) entirely hidden beneath palese, not definitely marked off from surrounding 

 segments, but bearing tvi^o large black eyes, each formed apparently by union of a pair. 

 Single median tentacle situated between eyes, and consisting of short pyramidal base, 

 long cylindrical stalk, and shorter, slenderer terminal joint, terminated by button-shaped 

 expansion with fringing processes. Palps smooth, twice as long as tentacles, tapering 

 gradually toward tips. Anterior part of head with palps separated from posterior part 

 witli tentacles by intercalated first segment. 



Palecp (PI. 46. tig. 21) flattened and paddle-shaped, with short straight basal portion. 

 Broad distal end rounded, symmetrical, and entire except in occasional posterior palese 

 ■with few serrations. Surface ornamented with delicate longitudinal striae. First 

 segment bears eight palese smaller than the rest and arranged in an outer and inner 

 group (latter overshadowing median tentacle). Dorsal cirrus of same segment situated 

 between two groups of palese and posterior to same, equal in length to tentacle. In 

 succeeding segments palese arranged in circular tuft ; those internal larger, as though 

 for purpose of roofing over dorsum. Number and length of palese increase on passing 

 backward : in middle of body eighteen may be present. Capillary setce, where present, 

 short and inconspicuous, posterior and external to palese in each segment. Dorsal cirri 

 witli structure similar to tentacle occur posterior and ventral to group of palese, 

 exceeding shorter paleae in length. 



Ventral setce (PI. 46. fig. 22) simple, stout, with bifid tip, apex being slightly curved. 

 Absent on first, four or five present on other segments. Ventral cirri short, half 

 the length of the dorsal. 



Localities. Cargados Corajos, B 2, 30 fathoms ; " from a crack in a coral mass." 

 Seychelles, F 9, 37 fathoms. 



As in other Palmyridse, the palese possess extraordinary golden lustre, in the first 

 specimen light, in that from the Seychelles a deep golden brown. The absence of a 

 definite cephalic disc is one character which separates this genus from Palmyra. 



* I have taken the liberty of naming this species after Professor W. C. Mcintosh, F.R.S., of St. AndrevTs, whose 

 moaumenlal researchea on British and foreign Polychacts are the admiration of all naturalists. 



