41 



Bræiu (T. Yl. Fig. 2). Aualk-ddet tragtformigt uden Cilier 

 i Randen (T. VI. Fig. 3); Anus i Bunden af Tragten. 

 Haarborsterne ere temmelig lange, lidt udvidede og smalt 

 bræmmede ved Begyndelsen af den lange Spids (T. VI, 

 Fig. 5). Iste bnrstehiprende Segment uden Hageborster, 

 af bvilke der tindes 4 paa det følgende Led og temmelig 

 talrigi' paa alle de iVilgende Led. Hageborsterne have et 

 Rostrum med 'å Tagger og et ' kort Haarbundt nedenfor 

 samme (T. VI. Fig. 4). ^ 



Myriochele Sarsii, n. sp. 



Stat. 3«, 4U. .51. 1(J4. 183. 



D\'rene ligge indesluttede i Ror af 2'/^ til 3 Ctm. 

 Længde og Lo'""' Bredde. Rorene ere tæt besatte med 

 Biloculiner, tilsyneladende noget forskellige, idet sonime 

 ere tyndere og ikke besatte saa tæt med Biloculiner som 

 Resten; men de indeslutte samme Dyr. 



Kroppen er 22""" lang og 



1 / m7n 



tyk, rund (T. VI, 



Fig. 6). Hovedlapjien er ægformig med Mundaabningen 

 paa Undersiden, uden Tilliæng og Øine (T. VI, Fig. 8). 

 Bag Hovedet komme 3 korte Led, der alene have Haar- 

 borster; de følgende Led have foruden Haarborstebundter 

 ogsaa Hageboi^ter i lange Tori paa Ventralfladen, de for- 

 reste Led noget kortere, de midterste de længste, mod 

 Bagenden igjen kortere, og de sidste 10 Led yderligt 

 korte; Analleddet noget opdi-evet og teml. langt, anus 

 terminal (T. VI, Fig. D). De dorsalt stillede Haarbørster 

 have nugeu Fodknude og danne to Bundter (T. VI, 

 Fig. 10); det øvre bestaar af lauge, tynde, fuldkomment 

 glatte Haarbørster (T. VI, Fig. 7, a), det nedre af 

 glatte, men kortere, lidt bredere og svagt krummede Bør- 

 ster (Fig. 7, /)), Hageborsterne sidde i lange Tori, der 

 ere noget hævede over Kroppens Niveau; Børsterne have 

 i Spidseu to fortil krummede spidse Hager paa et øvre 

 svagt S-krummet Stykke, der sidder fast paa en tynd, 

 i den ovre Ende hdt opdreven Stilk (T. VI, Fig. 12). 

 Børsterne sidde 4 — 5 jævnsides i Tori (T. VI. Fig. 11). 

 Tarmen gaar lige gennem Kroppen, er lieklædt med Oylin- 

 derceller fyldte med grønne Korn. I hvert af de lange 

 Segmenter lindes der paa hver Side en lang Sæk, der 

 indvendigt er beklædt med Flimmerceller med meget lange 

 Flimmerhaar, og som synes at udmunde melleni de dor- 

 sale Haarbørster og Tori. Jeg har ei været istand til at 

 opdage nogen indvendig Aabning paa dem; men de maa 

 dog vel antages at være Segmentalorganer. Ingen Blod- 

 kar kunde opdages. 



emarginate Ixirder on either side (Pl. VI. Hg. 2). The 

 anal articulation funnel-shaped, without cilia ahmg the 

 margin (PI. VI, fig. 3); the arius at the bottom of the 

 funnel-shaped segment. The capillil'orni setæ comparatively 

 long, a trifle enlarged, dilated, and with a narrow border 

 at the commencement of the point (PL VI, fig. o). The 

 first setigerous segment without ungueal setæ, of which 

 there are 4 on the following articulation and a good many 

 comparatively on the others. The uncini furnished with 

 a tridentate rostrum, below which] occurs a capillary fas- 

 cicle (PI. VI. fig. 4). 



Myriochele Sarsii, n. sp. 



J, /)1, 164. 183., ,, 



These animals inhabit tubiform buildings, from 2^j.^- 



Stats. 38. 40. 



to S™' in length and 1..0"'"' in breadth. The tubes, which 

 are densely studded with hihnHhi»'. would appear to vaiT 

 in torm and appearance, some being narrower and less 

 closely covered with hiloailinæ than otliers. 



Body cylindrical, measuring 22""" in length and '.-,'"'" 

 in thickness (PI. VI, fig. 6). The lobe of the head ovate, 

 with the buccal aperture on the under surface, without 

 either eyes or appendages (PL VI, fig. 8). Posterior to 

 the head are seen 3 short segments, furnished only with 

 capillary setæ; the succeeding segments have, besides 

 cajnllary setæ, also ungueal setæ. arranged in long rows 

 on the ventral surface. The anterior segments somewhat 

 shorter than the others, the medial longest, those near 

 the posterior extremity diminishing in length, and the 10 

 terminal segments exceedingly short; the anal segment 

 somewhat enlarged, and rather long (PL VI, fig. 9), the 

 anal opening at its extremity. The dorsally placed capil- 

 lary setæ have no pedal ijrotuberance ; they constitute two 

 fascicles (PL VI, fig. 10), the ujiper fascicle composed 

 of long, slender, perfectly smooth capillary setæ (PL VI. 

 fig. 7, a), the lower of smooth, but shorter, a trifle broa- 

 der, and slightly curved setæ (fig. 7, b). The uncini 

 arranged in long rows, slightly projecting above the surface 

 of the body; these setæ have at the extremity two sharp, 

 anteriorly curved hooks, issuing from a lamella, resembhug 

 above the letter S, attached to a slender stem (PL YI. 

 fig. 12) slightly enlarged at the up])er extremity. The 

 uncini are arranged in rows. 4 or o side by side (PL VI. 

 fig. 11). Tlie intestine, passing straight through the body, 

 is furnished with cylindrical cells, full of green granules. 

 Each of the long segments has. on either side, an elongate 

 sac, having a layer of cells, with exceedingly long, vibra- 

 tile cilia, and apparently disemboguing between the dorsal 

 ca])illary seta^ and the row of uncini. I failed indeed to 

 detect any o])ening on its inner end; but it probably 

 must be regarded as the segmental organ. No trace of 

 blood-vessels. 



Deii norske Naniliiivsoxpedition. G. A. Hansen: Annelida. 



