BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 20. AFD. IV. N:0 12. o7 



Ilyarachna Bergendali n. sp. 



Fig. 8 a d. 



This species which I dedicate to my learned friend Prof. 

 D. Bergendal, Ph. Dr., of Lund, was obtained 



in 1898: 

 ^tat. 33. lat. 78 .00' N., loug. 27 39' E., King Charles Island, depth 

 20 m., bottom temp. + 0,2 C, soft yellowish-red clay, 

 12/VIII, two spec. 



in 1899: 

 stat. 28. lat. 71 33' N., loug. 21 30' W., one km. from Murray's 

 Island, do])th 200 m., mud witli sand, 28 VII, one spec. 



Ilyarachna Bergendali is most allied with the preceding 

 species, Ilyarachna, hirticeps Gr. O. Särs. Like this, the an- 

 terior edge of the first four segments of the mesosome is ere- 

 nulated throughont. (Jaudal segment like that in the other 

 species. Oral parts in no respect differing from those in 

 /. hirticeps. 



But in other points there is a striking diiference between 

 both species. Thus, I. Bergendali seems to be a little smaller 

 than I. hirticeps. My largest specimen is not fuUy of the 

 length of 6 mm. When seen from above, cephalon is much 

 narrower than the following segment, and, from a lateral 

 aspect, its upper margin is nearly straight, not convex as in 

 other species. The upper surface of the body is coyered by 

 scattered short hairs, especially observable along the anterior 

 and posterior margins of cephalon and the first four meso- 

 some segments. On the caudal segment they are shorter, 

 more like spines, and scattered över the whole upper surface. 

 The fifth segment of mesosome not at all emarginated behind. 

 Epimers not produced in pointed lappets. 



The fourth joint of the inferior antennse longer than the 

 body. The fifth nearly two thirds of the length of the fourth. 

 Flagellum nearly as long as the whole peduncle and com- 

 posed of many joints. 



The superior antennse or antennultc reaching to the end 

 of the third joint of the peduncle of the superior antennfle, 

 Flagellum composed of two — four joints. 



