208 SYLLIS BKEVICOLLIS. 



Head (fig. 55) somewhat triangular, bluntly pointed anteriorly, with distinct, elongate, 

 ovoid palpi (in spirit). Paired tentacles of fourteen segments : median of seventeen seg- 

 ments. JSFo eyes, a rare condition in the Syllids. 



Body incomplete posteriorly, 5*5 mm. long and 0*5 mm. in breadth ; segments thirty, 

 and of a deep yellow colour. First segment very short, apparently overlapped by the 

 head, bearing on each side a pair of cirri, the dorsal having thirteen segments and being 

 somewhat longer than the ventral. 



The proboscis has ten soft papillae, and behind them a single tooth. It extends to 

 the ninth segment, the proventriculus being in the next seven segments. 



The foot has dorsallya cirrus of nine to eleven segments, thus being comparatively short, 

 a cylindrical setigerous region bearing bristles, two or three of which dorsally have 

 very long tapering tips with a slight hook, and a group with much shorter tips, also 

 simply hooked ventrally. The ventral cirrus is simple and more or less cylindrical and 

 pointed at the tip (Ehlers). 



Fig. 55. — Head of Syllis abys&icola, Ehlers. (After Ehlers.) 



Ehlers considers that in the absence of the eyes this species approaches Syllis 

 variegata, Grube. 1 



12. Syllts beevicollts, Ehlers, 1875. 



Specific Characters. — Head resembling that of Syllis armillaris, but the median 

 tentacle is longer. The lateral tentacles have fifteen segments. Body normal. First 

 segment with two tentacular cirri, the dorsal very long. Proboscis with a single tooth, 

 and reaching to the thirteenth segment. Foot has a long dorsal cirrus of forty to fifty 

 segments. Setigerous lobe short and blunt ; bristles have a somewhat long terminal piece 

 with a simple hook. Ventral cirrus short and clavate, a little longer than the setigerous 

 lobe. 



Synonyms. 



1875. Syllis brevicollis, Ehlers. Zeitsch. f. w. Zool., Bd. xxv, p. 44, Taf. ii, f. 16 and 17. 

 1879. Typosyllis (Syllis) brevicollis, Langerhans. Ibid., Bd. xxxii, p. 533. 



Habitat. — Dredged on the 15th July in the ( Porcupine ' Expedition of 1869 at Station 

 47, 59° 14' 1ST., 7° 18' W., in 650 fathoms (Langerhans says 1380 fathoms), on Holtenia 

 ground with mud and Grlobigernia-ooze, mingled with sand. 



1 "Beschrieb. neuer oder wenig gekaunter Annel.," ' Arch. f. Naturges./ Jahrg. 26 (1860), p. 85, 

 Taf. iii, fig. 6. 



