260 Prof. M'lntosirs Notes from the 



tIicconic.nl spinigorous lobe lyiiifi" between. Jn several views 

 therefore the tip is trifid. 



A fifth British example is A^. longisetosa, OErsted (1813), a 

 very different species from the A', longisetosa (Q^rst.) of 

 Dr. Johnston, which may have been the long-bristled form 

 of A^ coco, though Malmgren found the cxami)les in the 

 ]^rilish ^luseuni to comprise N. scoJopendroides and another 

 species. In this the head is somewhat shield-shaped; the 

 anterior tentacles marked by a translucent stripe in front, 

 long and slender; second pair also long and lanceolate. 

 Proboscis distinguished by fifteen rows of 11-15 papillre*. 

 Dorsal lamella of the foot elevated and prominent, with an 

 accessory rounded process. Dorsal cirrus large and laneeo- 

 latC; closely connected with the base of the branchia, only 

 a shallow notch intervening, and the branehia is often curved 

 inward. Ventral division with a tongue-shaped lamella above 

 the dorsal edge at the tip, and only a narrow lamella beyond 

 the foot. Both barred and serrated (cajjillary) bristles are 

 jcllow or brownish, with a metallic sheen, and largely deve- 

 loped, the latter presenting a gentle curve from base to apex, 

 the minute spines being traceable from the short shaft to 

 the tip. 



Another species, somewhat allied to the foregoing, is 

 JSfphthys Gruhei'\, sp. n., which was dredged at station 8 on 

 board the ' Knight Errant/ 17tli August, 1880, in 540 fathoms 

 in the Atlantic. The head is elongated from before back- 

 wards, with a straight anterior edge, which is somewhat 

 narrower than in A^. Icncjisetosa. The tentacles at the outer 

 angles are conical, tapering, and have a translucent area at 

 the inner border. The second pair follow close on the first 

 and have the form of an acuminate leaf, whereas in A^. longi- 

 setosa they arc more widely sejiarated from the first, are 

 proportionally longer and more pointed. At each angle of 

 the head posteriorly is a papilla, proljably sensory, the corre- 

 sponding organ in A^. Jongisetosa being inconspicuous. The 

 ])roboscis is included, but the arrangement of the parts around 

 the mouth is similar. The first foot differs from that in 

 A^. longisetosa, for it has a well-marked subulate dorsal process 

 or cirrus, besides the lanceolate ventral one, whereas in 

 A^. longi&etosa only a small pa])illa occurs dorsally and the 

 veiitral cirrus is much longer. In the typical foot the dorsal 



* Malnioren ^ves 14. 



t Named after the late Prof. Edouard Grube, of Breslau, a distin- 

 guished investigator of the Annelids. 



