Second German Korth-Polar Voyage. 201 



becomes nearly cylindrical. Head somewhat narrowed in 

 front (PI. XI. fig. 4). In front, on the cephalic lobes, there are 

 two small romid projections. Two eyes, on two flat cushions, 

 which become fused together behind and run out into a single 

 flat and narrow cushion, extending as far as the fourth body- 

 segment. 



Buccal orifice bounded to the right and left by pad-like lips, 

 which unite below at an acute angle (fig. 5). 



The first body-segment bears two tufts of setae, which are 

 smaller than those on the three following segments. The seta? 

 of the upper tufts of the fore body (in front of the fifth segment) 

 are subulate, those of the lower tufts narrowly lanceolate 

 (figs. 9 & 10). On the fifth segment there is, both above and 

 below the thick setse, a small tuft of fine set« (figs. 11 & 12). 



From the sixth segment onwards there are on the ventral 

 surface uncini, five or six in each row ; they are slightly 

 sigmoid and two-pointed (fig. 8). The setse of the dorsal 

 surface stand upon the anterior surface of small tubercles ; and 

 behind these are the branchiaj, which only become long enough 

 to be called linguliform from the tenth segment onwards. 

 They are longest on the seventeenth segment. In front of 

 the longer branchige the. setigerous tubercles are smaller than 

 before the shorter ones. Each branchia contains a simple 

 vascular loop without anastomoses. 



From the eighteenth segment onwards there are on the sides 

 of the body, lower down than the branchia, and at the boundary 

 between each two segments, some tubercles, Avhich posteriorly 

 become racemose. These are egg-racemes or external ovaries 

 (figs. 6&7), with ova not yet fully developed (fig. 14). On 

 the inner surface of the body-wall there are elongated ova 

 (fig. 13) in the same segments of the body which bear external 

 ovaries. 



Unfortunately only one example of this woi*m was fomid. 

 It is brownish yellow (in spirit), and has on the middle of the 

 hinder part of the back two brown longitudinal lines, which 

 are thickened parts of the cuticle. 



I place this new genus among the Bpioidei. It has no 

 cephalic a])pendages like Prionos'pio^ Malmgr., possesses lingu- 

 liform branchia3 with a simple vascular loop, like 8'pio^ Fab., 

 and has a comb-like series of thick seta? in the fifth body- 

 segment, like Po/ycZora, Busk [Leucodore^ Johnst.). 



The formation of the ova in external ovaries is a phenomenon 

 not previously observed among the Annelides. 



6. Scoloplos armiger, Mlill. 

 Sabine I.sland. 

 Distr. Spitzbergcn to the Baltic, north of France. 



