330 HARMOTHOE ZETLANDICA. 



hans 1 point to the same conclusion. In the southern forms the pallor of the first pair of 

 scales is characteristic. The Polynoe crassipalpa of Marenzeller from the Adriatic is 

 a very closely allied form, but, if the author's figures and descriptions are to be relied on, 

 the British form is distinct, the tip of the dorsal bristles alone being characteristic. In 

 Marenzeller's specimen also the large anterior eyes are not so near the tip of the peak as 

 in the British form. Levinsen (1883) seems to think this closely approaches Harmothoe 

 ljungmani, but the foregoing remarks demonstrate the differences. 



3. Harmothoe zetlandioa, Mcintosh, 1876. 



Specific Characters. — Body sublinear, narrowed anteriorly and posteriorly ; bristle- 

 bearing segments thirty-five to thirty-six. Head elongated from before backwards, with 

 two acute peaks in front. Tentacles and cirri without apparent enlargement below the 

 tip, and with sparsely distributed short clavate cilia ; lateral tentacles inferior. Palpi 

 minutely papillose. Eyes all visible from the dorsum, the larger anterior pair at the 

 base of the peaks. Scales fifteen pairs, covering the dorsum, ovate or oval with the 

 exception of the first pair, which are rounded, with few and indistinct papillae. Dorsal 

 bristles strongly curved, sharp-pointed, and with distinct rows of spines, the sharp tip 

 being bare ; ventral bristles with short spinous regions and smooth tips, the latter being 

 hooked and having a long straight secondary process, which is parallel and closely applied 

 to the other division, — that is, no gap is present. 



Synonym. 



1876. Harmothoe zetlandica, Mcintosh. Trans. Zool. Soc, ix, p. 379, pi. lxviii, f. 4 and 5; pi. lxix, 



f. 1. 



Habitat. — Dredged in 5 fathoms amongst the tangle-roots in Bressay Sound, 

 Shetland, July, 1871. 



The specimens are about half an inch in length. 



Head (XXVIII, fig. 1) somewhat elongated from before backwards, terminating 

 anteriorly in two pointed lobes on each side of the median tentacle. The eyes are all 

 visible from the dorsum ; the smaller posterior pair lie in front of the nuchal collar, while 

 the larger anterior pair are situated at the base of the peaks and look laterally and 

 f/V v dorsally. They are not so far forward as the anterior eyes of Harmothoe spinifera. 



The cephalic appendages are somewhat short. The median tentacle is not much, if at 

 <\P> all, enlarged below the filiform tip, and is furnished with a few clavate cilia. In some it 





is deeply pigmented at the base. The lateral tentacles are short, enlarged at the base, 

 but tapering at the tips after the manner of the ventral cirrus, and with sparse but 

 distinct clavate cilia. The palpi are gently tapered from base to apex, and, while smooth 

 or only wrinkled under a low power, show minute papillae under a high power. The 

 tentacular cirri taper from base to apex, have no enlargement below the latter, and have 

 clavate cilia like those of the median tentacle. 



1 c 



Zeit. f. w. Zool./ xxxiii, p. 275. 



