186 SYLLINE KUBROPUNCTATA. 



Genus LIII. — Sylline, Grube, 1860. 



Head as in Autolytus, but the palpi, though coalesced at the base, are separated 

 distally. Tentacles and tentacular and dorsal cirri not articulated. Body as in Autolytus. 

 Feet with a smooth, tapering dorsal cirrus ; setigerous region rather short, and having 

 beneath it a broadly lanceolate ventral cirrus. Spines with a hammer-like tip ; bristles 

 with a short terminal piece ending in a single boldly-curved hook. 



1. Sylline rubropunctata, Grube, 1860. Plate XL VIII, fig. 5 ; Plate LXX, fig. 26- 

 foot; Plate LXXIX, fig. 26— bristle. 



Specific Characters. — Head as in the type, only the short palpi are clearly separated 

 by a median fissure. Eyes two on each side, the anterior being the larger and wider apart ; 

 both with lenses — indeed, the anterior show two. Median and lateral tentacles long. 

 Tentacular cirri as in Procersea (Marion ,and Bobretzky). Body about 20 mm. in length, 

 and with 120 or more setigerous segments. Dorsally the translucent body is marked by 

 a series of orange touches — two or four in number — longitudinally arranged, the buccal 

 segment, however, having only the two outer. Minute, clear corpuscles occur in the skin, 

 forming a transverse line in the segment (Marion and Bobretzky). 1 



Eoot rather prominent, with a considerable dorsal cirrus tapered distally Cirri of 

 the first fourteen feet alternately longer and shorter. The setigerous region is short, 

 with the long slope inward ventrally. Two spines pierce the upper angle of the region, 

 their tips having a shoe-like modification, or shaped like a hammer. The bristles are 

 slightly yellowish, curved distally, and bear a short, simply-hooked terminal piece. The 

 enlarged end of the shaft is spinous on the convexity and sides of the peak. 



Synonyms. 



1860. Sylline rubropunctata, Grube. Arch. f. Naturges., Bd. xxvi, p. 87, Taf. iii, f. 8. 



1861. „ „ idem. Ausflug Triest, p. 144, Taf. iii, f. 8. 



1875. Autolijtus (Procersea) ornatus, Marion and Bobretzky. Ann. Sc. Nat., 6 e ser., torn, ii, p. 44, 



pi. v, f. 14. 

 1879. Procersea rubropunctata, Langerhans. Zeitscli. f. w. Zool., Bd. xxxii, p. 579, Taf. xxxii, 



f. 30. 

 1890. Autolytus rubropunctatus, Malaquin. Annel. Boulonn., Rev. Biol. Nord Fr., t. iii, p. 179. 

 1904. „ „ Allen. Journ. M. B. A., n.s., vol. vii, p. 220. 



Habitat. — Dredged on Queen's Ground, Plymouth (Allen). 



Porto re in the Adriatic (Grube) ; Marseilles, from the deeper waters inhabited by 

 Gorgonia (Marion and Bobretzky) ; Madeira (Langerhans). 



Head ovoid, with a median, longitudinal sulcus ; the fused palpi are separated in front 

 by a median fissure. Eyes black, two on each side, the anterior the larger and wider apart. 



1 Yiguier questions if a dorsal cirrus is present on the second bristled segment, but it seems to 

 occur in the British specimen. 



