136 EUNICiE. 



8. NORTHIA. 



Onuphis, Oersted, Groenl. Annul. Dorsibr. 19. Johnston in Ann. ^• 

 Ma;/. Nat. Hist. xvi. 7- 



Char. Body scolopendriform : head exposed, distinct, with two 

 short thick antennae, and five greatly elongated tentacula, two in 

 front, and three across the occiput : eyes two, posterior : the first 

 two segments dissimilar to the following, furnished with a superior 

 and inferior cirrus, and with strong bristles, partly straight and 

 partly hooked at the apex: the succeeding segments have three 

 kinds of bristles, one stout, straight, and uncinate, — another slender, 

 curved, and setaceous, — and another of small size, with a funnel- 

 shaped apex. Tubicolous. 



Obs. From the absence of pectinate branchise, which are present 

 in Onuphis, I have placed the following species in a new genus, the 

 character of which is borrowed principally from Oersted. 



1 , N. tubicola, the tube quill-like and horny, smooth and transpa- 

 rent : posterior tentacula annulated at the base only. 



Nereis tubicola, Miill. Zool. Dan. Prod. no. 2625; Zool. Dan. i. 18. 



tab. 18. f. 1-6. Turt. Gmel. iv. 87. And. S,- M.-Edw. Lift, de la 



France, ii. 154. W. Thompson in Rep. Brit. Assoc. 1843, 76. 



Peach in ibid. 1844, 64; Ray Soc. Zool. Rep. 1847, 508. 

 Leodice tubicola, Savign. Syst. Annel. 52. 

 Nereidonta tubicola, Blainv. Diet. Sci. Nat. Ivii. 477- 

 Onuphis tubicola, Johnston in Ann. Sf Mag. Nat. Hist. xvi. 6. fig. 

 Eunice tubicola, Fleming in Encyclop. Brit. edit. 7- 219. pl. 275. 



f. 14 & 17. Landsborough, Excurs. Arran, 49. 



Hab. The coralline region. 



Desc. Worm linear -elongate, somewhat compressed, but convex 

 on both dorsal and ventral surfaces, which are smooth and polished ; 

 the colour a uniform yellowish-brown, finely iridescent. Head 

 (No. XX. fig. 2) narrow, sinuatetl in front, with five much-elon- 

 gated tentacula annulated at the base, the outer pair shorter than 

 the three posterior by one-half. Eyes behind the base of the tenta- 

 cula. Occipital segment without any appendage. Segments (fig. 3) 

 narrow, the length about a third of the transverse diameter. Foot 

 uniramous, with two fascicles of bristles, each fascicle with a spine 

 (fig. 4), two forcipate spinets (fig. 5), and many lanceolate slender 

 bristles (fig. 6), the upper half bent aside from the line of the shaft, 

 setaceous, and sharp-edged. Superior cirrus setaceous, not project- 

 ing beyond the foot on the anterior segments, but becoming con- 

 siderably longer on the posterior, annulated at the base. Inferior 

 cirrus shorter, but setaceous. Anal segment with two styles. 



