from the North Sea and aJjacent parts. 301 



From these data it appears that the species is a northern 

 as well as a deep-water form. At Station 34 in the 

 'Porcnpinc' Expedition of 1809, this form was found in 

 725 fatlioms on mud and sand, and in the expedition of 1870 

 a variety was found in 539 fathoms in grey mud. J, G. 

 Jeffreys, too, dredged it 55 miles west of Yalentia, Ireland, 

 in CO fathoms. Canon Norman obtained it amonj^st 

 coral and mud in Norway, Marenzcller at Adria, while the 

 Monograpii records its extension to Canada^. Neither 

 Izuka nor the ' Challenger^ Report makes mention of this 

 species. 



The head bears five fairly long tentacles, the median being 

 mere posterior and longer than the others. The tips are 

 articulated, but the articulations arc best seen in the external 

 pair fur more than half their length. The eyes are mode- 

 rately large, black in colour and lie between the two lateral 

 tentacles. The palpi are stout, short, and fused together, 

 having a deep uotch in front and a deep groove ventrally. 

 The dorsal pits meutionccl in the Monograph f are not 

 present. 



In well-grown specimens the body measures 6-8 inches 

 long, but the largest specimen of this collection measures 

 only a little over 3 inches. It is very little tapered anteriorly, 

 but posteriorly the body diminishes gradually to the tail, 

 ■where it ends in two long slender caudal cirri, which are 

 situated below the anus. The first segment is very broad, 

 with well-marked lateral notches on each side and having its 

 front edge concave from side to side ventrally. The second 

 segment, however, is very narrow and bears the tentacular 

 cirri, which are two in number and which, slightly crenulatcd 

 in appearance, are tapered, but are not so long nor so strong- 

 looking as the tentacles. 



None of the annelids show an extruded i)roboscis which, 

 as elsewhere shown, has a strong pair of raaxillte, each of 

 which articulates with a spatulate process posteriorly. 

 Moreover, the dental plates are powerful and each has seven 

 teeth, the largest in front. The mandibles also are 

 strong, the anterior edge being denticulated and the oral 

 plate which, as usual, is most extensive ventrally, is white +. 



The colour is pale brown, the dorsum being darker in hue 

 than the ventrum, while at the sides the branchiae, bleached 

 in the spirit-specimens of this collection, appear as bright 



* Vide ' Monofrrapli,' vol. ii. part ii. p. 4.36. 

 t Vufe ' Mouograph,' vol. ii. part ii. p. 486. 

 X Vide ' Monograph,' vol. ii. part ii. p. 4o7. 



