510 SCOLOPLOS ARMIGER. 



Scoloplos armiger, 0. F. MUler, 1 788. Plate LVI, fig. 7 ; Plate LXV, figs. 4 and 4 a— 

 head and tail; Plate LXXXVI, figs. 1 and 1'— bristles; Plate LXXXVII fi>s 4- 

 4 5— feet. ' 5 • 



Specific Characters.— -Head an acutely pointed cone set on the larger truncated cone 

 of the peristomial segment. Often with deep-seated dark specks at the base. Body 

 flattened and widened anteriorly, then rounded ventrally, and flattened dorsally in its 

 progress to the tail, which ends at the vent surrounded by four papilla?, whilst on each side 

 is a long slender cirrus. Anterior region of about eighteen segments with lateral feet, 

 having shorter, stouter, serrated bristles. The fifteenth foot is composed of a conical 

 dorsal cirrus or lobe, with, in front of it, a tuft of rather long bristles, the shafts of which 

 are smooth. The tapering tips are peculiarly spiked and end in smooth, hair-like points. 

 The ventral division has two short conical papillaa, one of which is below the bristle- 

 tuft and probably represents the ventral cirrus, whilst the other is behind the middle of 

 the dense, deep row of bristles, which are shorter than the dorsal but of the same type. 

 Feet posteriorly are dorsal, the branchia being nearest the middle line, then follows the 

 dorsal cirrus of the shape of a bellied knife and about half the length of the branchia, and 

 lastly the dorsal fascicle of serrated bristles. The ventral division is a little shorter and 

 boldly bifid, the upper process being the longer. The small group of slender bristles 

 emerges between them. 



Branchias commence in the form of a small papilla on or about the seventeenth 

 bristled foot, attain considerable size on the twentieth foot, and almost reach the tip of 

 the tail. Below the foot from the eighteenth bristled segment to the thirtieth (fewer in 

 some) a papilla occurs on the side of the body. 



Synonyms. 



1788. Lumbricus armiger, 0. F. Miiller. Zool. Danica, i, p. 22, Tab. xxii. 

 1828. Scoloplos „ De Blainville. Diet. Sc. Nat., lvii, p. 493. 



1842—3. „ „ (Ersted. Kroyer's Nat. Tids., p. 125. 



1843. Aricia MueUeri, H. Ratlike. Nova Acta Leop.-Car., xx, i, p. 176, Tab. viii, f. 9 — 15. 

 „ Scoloplos armiger, (Ersted. Annul. Danic. Consp., p. 37, f. 8. 



idem. Gronl. Annul. Dorsibr., pp. 106, 107, 109, 201, f. 113, 117, 118. 



1844. „ ,, idem. Arch. f. Naturges., x, i, p. 104. 

 „ „ „ idem. Regionis Marinis, p. 78. 



1844—5. ,., „ idem. KroyerVNat. Tids. (Drobak), p. 412. 



1851. Aricia armigera, Grube. Fam. Annel., pp. 68 and 135. 

 1853. „ „ Sars. Nyt Mag. f. Naturvid., vii, p. 381. 



1856. ,, „ Koren. Ibid., ix, p. 95. 



1858. ,, armiger, Danielssen. Reise, 1857, p. 53. 



1859. „ „ idem. Ibid., 1858, p. 129. 



1865. 3 , armigera, De Quatrefages. Annel., ii, p. 286. 

 1867. Scoloplos armiger, Malmgren. Annul. Polych., p. 72. 



1869. „ „ Mcintosh. Rep. Brit. Assoc. (1868), p. 338. 



1870, „ „ Grube. Arch. f. Naturges., xxxvi, p. 316. 



