SPIDERS 



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habit is the most efficient means that spiders have of dispersing themselves and that the 

 Linyphiidae are the most frequent aeronauts. Still more recently in a paper on the 

 spiders of Krakatau Island, which is in course of publication in the Proceedings of the 

 Zoological Society, I have suggested that certain families never make use of this means 

 of dispersal and the Agelenidae seldom or never. This does not mean that it is impossible 

 for the Cybaeinae to cross the sea, but it does remove their most efficient means of doing 

 so, and it suggests to our minds that a simple explanation of our difficulties would be 

 that land connections existed in the past between these Antarctic islands and a main- 

 land, such as the Antarctic Continent. 



Fig. I. Myrofrigida, sp.nov. a, eyes and chelicerae. b, female epigyne. r, d, male palp from below and above. 



Myro frigida, sp.nov. 

 Size. Female 2-5 to 3 mm., male 2 to 2-5 mm. 



Eyes. Median anterior eyes easily the smallest; seen from in front, they lie slightly 

 above a line joining the base of the anterior lateral eyes, but not nearly so far above such 

 a line as in the type species M. kergiielenensis Camb. or M. caffer Sim. (Compare Fig. i a 

 with figure by O. P. Cambridge in Proc. Zool. Soc. 1876, p. 258, and E. Simon in 

 Histoire Naturelle des Araignees, Tome 2, p. 237.) Eyes on dark patches. 



Chelicerae. Vertical. The dentition of the teeth differentiates this species from those 

 previously described in so far as the descriptions allow such a comparison being made. 

 In the present species the front or outer row consists of six rather sharp thin teeth 

 diminishing in size at each end of the row. The inner row comprises three small teeth. 



Sternum. Dark and somewhat heart-shaped with a narrow extension posteriorly 

 passing between the hind coxae. 



