332 HARMOTHOE LJUNGMANI. 



When contrasted with the young of Harmothoe imbricata the head of this form is 

 much more elongated antero-posteriorly, and the four eyes are visible from the dorsum, 

 whereas in H. imbricata the posterior pair only are generally seen. The tentacles and 

 other cephalic processes are different. The body is narrower and longer, and the bristles 

 are much smaller, so as to alter the outline ; and their structure, as well as that of the 

 scales, is essentially different. From the Parmenis ljungmani of Malmgren, 1 to which it 

 is allied, it differs in the structure of both dorsal and ventral bristles as well as in that 

 of the scales. 



Allied forms to both this and the succeeding species (Parmenis ljungmani) are the 

 Polynoe vasculosa of Olaparede, 2 and the Polynoe crassipalpa of Marenzeller. 3 They, 

 however, differ in regard to the shape of the head and the structure of the bristles. 



This species takes the place of the closely related Parmenis ljungmani of the Outer 

 Hebrides, and the representatives of both appear to be few. It is probable that, like 

 allied forms, it may be commensalistic. 



4. Haemothoe ljungmani, Malmgren, 1867. 



Specific Characters. — Body small, sublinear, bristled segments thirty-five to thirty- 

 six. Head elongated antero-posteriorly, somewhat narrower in front, and with two short 

 peaks. Eyes visible from the dorsum ; two at the posterior border, and two larger at the 

 side in front of the middle line. Tentacles and tentacular cirri short and tapering, with 

 sparsely distributed clavate cilia. Palpi elongate, subulate, with minute papillae. Ten- 

 tacular and dorsal cirri alike. Ventral cirri enlarged at the base, similarly ciliated. 

 Scales fifteen pairs ; first pair suborbicular, the others obliquely ovate or ovoid, increas- 

 ing in size till the two last pairs, with very few minute papillae along the outer and 

 posterior border, while the tubercles on the surface are larger and more numerous than 

 in H. zetlandica. Dorsal bristles stouter than the ventral, rather short, curved and 

 little tapered, with close rows of spines which extend to the tip. The ventral bristles 

 have short spinous tips ending in a smooth and characteristically curved claw, while the 

 secondary process leaves a gap between it and the base of the hook. 



Synonyms. 

 1867. Parmenis ljungmani, Malmgren. Ann. Polycheeta, p. 11, pi. i, fig. 2. 



1875. Harmothoe Macleodi, Mcintosh. Invert, and Fish., St. A., p. 116. 



1876. „ „ Ibid. Trans. Zool. Soc., ix, p. 882, pi. lxix, f. 2, 3. 



1888. „ „ De Saint Joseph. Ann. d. sc. nat. (7), v, p. 168, pi. vii, f. 37 — 40. 



Habitat. — Between tide-marks under stones at Lochmaddy, North Uist, and in the 

 stomach of the cod, St. Andrews (E. M.). Shores of France — Dinard. 

 Length about 14 mm. ; breadth across bristles 3 mm. 



i ' Annulat. Polychast., &c.,' p. 11, pi. i, fig. 2, 1867. 



2 ' Annel. Chetop. Nap., Suppl./ p. 12, pi. i, f. 4. 



3 " Zur Kenntniss d. Adriat. Annel./' < Sitz. der k. Akad. Wissensch./ April 1, 1874, p. 6,Taf. ii. 



