XENOSYLLIS (?) KESTBERGL 155 



Whether this minute species lives amongst the bristles of Aphrodita or was only 

 entangled therein in the dredge is unknown. 



This species somewhat resembles Claparede's 1 Exogone Kefersteinii from St. Vaast-la- 

 Hougue, and may be a young form of this or an allied species such as Exogone gemmifera, 

 yet the structure of the bristles, the form of the cephalic segment, and other details differ. 



The specimen has been lost or mislaid since the description was drawn up, so that 

 drawings could not be made. 



Genus XL VI. — Xenosyllis, Marion and Bobretzky, 1875. 2 



So far as can be observed in the single example the following characters appear to 

 coincide with this genus, the type of which is the Syllis scabra of Ehlers. 3 Head with 

 comparatively large palpi fused at the base. Tentacles three, thick, short, and monili- 

 form, as also are the tentacular cirri. Body 4 somewhat short and broad, with rather 

 long setigerous processes to the feet, short, moniliform dorsal cirri, and a broadly lobate 

 ventral cirrus. Bristles strong, terminal piece simple. 



1. Xenosyllis (?) Kinbergi, 5 n.s. Plate LIX, fig. 7; Plate LXX, fig. 2— foot; Plate 



LXXVIII, fig. 10— bristle. 



Specific Characters. — Head with two comparatively large palpi, fused at the base, 

 visible ventrally, and prominent laterally. Median and lateral tentacles short, moniliform. 

 Tentacular cirri two on each side, moniliform. Body 10 mm. long, having about fifty 

 bristled segments, about equally narrowed anteriorly and posteriorly. Posterior end 

 imperfect. Foot : dorsal cirrus short, stout, slightly tapered towards the tip ; nine to 

 ten segments in the anterior third. Setigerous region comparatively long. Bristles 

 strong, terminal piece with a simple hook — longer in the posterior region of the body. 

 Ventral cirrus bluntly rounded at the tip, and in shape broadly lobate. Tip of the 

 spines bent. 



Habitat. — Berehaven, Ireland, Royal Irish Academy's Expedition, 1885, along with 

 Syllis comnta, H. Pathke. 



Head with comparatively large palpi fused at the base. The median and lateral 

 tentacles are short, but distinctly moniliform, the former being the longer. Two small 

 eyes occur on each side posteriorly, arranged in the usual trapezoid, the anterior pair 



i < Beobach./ p. 42, Taf . xii, figs. 3—6. 



2 < Ann. Sc. Nat./ 6 e ser., ii, p. 26. 



3 < Borstenw./ i, p. 244, pi. xi, figs. 1—3 (1864). 



4 No indication of a scabrous condition was seen. 



5 Named after the distinguished Swedish zoologist, Professor Kinberg, who has done so much 

 valuable work in the Annelids. 



