43 



The color of the animal preserved in spirit is white, with gi'eyish olive-green (some- 

 times darker, nearly black) belts or bands across the back, usually (see fig. 15) one on every 

 other segment, sometimes even (see fig. 12) on 2 consecutive segments, very seldom on 3. 

 These colored belts are however interrupted in the medial line of the back, and do not more- 

 over reach down to the feet; so that each of them properly consists of 2 transversal, elon- 

 gated quadrangular or rectangular spots situated in one line. 



I found first a few small specimens of this peculiar Annelide in the summer of 1865 

 at the entrance to Flekkefjord, at a depth of 80 — 100 fathoms. Afterwards I found it again 

 on several other points of our coast, although always rarely; namely at Lofoten in 150 — 300 

 fathoms; in the Hardangerfjord, where it goes up even to 40 fathoms; and finally not long 

 ago at Christiansund and Aalesund in 100—150 fathoms. 



The new Genus and species may be characterised in the following manner: 



Gen. Umbellisyllis. M. Sars. 



Corpus vermiforme, liaud longuni, segmentis brevibus, cims 2 analibus. Lobi capitis 

 frontales minuti, late distincti; oculorum paria 2, anteriora minora, et ante hos puncti ocu- 

 lares 2 mininii; tentacula 3 aequalia subcylindrica brevissima, non moniliformia: duo anteriora 

 ad sulcum lobos frontales a capite separantem posita, tertium postice in medio vertice. Ten- 

 tacula 2 oralia iisdem capitis simillima, in segmento buccali ad latera oris posita. Cirri 

 tentaculares nulli. Pedes uniremes, setis compositis spinosis minuti ; cirro dorsali elongato 

 non monilifonni, a pede remoto, lateri corporis affixo; cirro ventrali brevissimo ad apicem 

 pedis sito. Margo occipitalis lamina munitus cutacea sub-semilunari, transversa, ciliata, mar- 

 gine inferiore medio adnata ceteroquin libera et supra basin lobi cephalici prominente. 



Urabellisyllis fasciata. M. Sars, unica species. 



Corpus subcrassum, antice parum, postice magis angustatum, semicylindricum, dorso 

 fornicato, ventre applanato, segmentis setigeris circiter f.5 brevibus (5— 6^?= latioribus quam 

 longioribus). Caput subtetragonum, latius quam longius, lobis frontalibus triangularibus; ten- 

 taculis quartam ad quintam capitis latitudinis partem longitudine ;pquantibus; occulis fusco- 

 rubris, anterioribus paulo distantioribus quam posterioribus ; lobo occipitali latitudinem capitis 

 aequante. Pedes subcylindrici, quartam fere latitudinis corporis partem longitudine a^quantes, 

 cirro dorsali pede multo longiore. Cirri anales conico-accuminati, breves (segmentis 2 prox- 

 imis junctis longitudine »quales). Color albidus fasciis dorsalibus transversis, medio inter- 

 ruptis, cinereo-olivaceis in segmentis alternis aut in 2 (rarissime 3) subsequentibus. Longit. 

 corporis 24 Mm. latit. maxim. 3 Mm. 



Habitat at oras Norvegise meridionales, occidentals et boreales in profunditate 40 

 — 300 orgyarum. 



Although the present Annelide in respect of its proportionally short body consisting 

 of few segments, and the colored belts with which it is adorned, has a great resemblance to 



