DISTRIBUTION 1 53 



floats of sea planes; the period spent out of water would be no great 

 hazard since the valves close and prevent desiccation. 



All the terrestrial isopods of Newfoundland seem to have been 

 transported there by man. Twelve species are known from the 

 island, and not one is an endemic American species, but all are 

 widely distributed in the Old World, especially in Western Europe. 

 It is significant that five of the twelve species are known only from 

 the Avalon Peninsula, where they seem to have arrived via the 

 harbour of St. Johns. A further interesting point is that one of the 

 most widespread woodlice of Newfoundland is the parthenogenetic 

 form of Trichoniscus pusillns. 



LITERATURE 



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25: 30-60 and 131-176. 

 Brunn, A. F. (1957). Deep sea and abyssal depths. In: Treatise on 



marine ecology and paleoecology . Geol. Soc. Amer. Mem. 67, 



vol. i, pp. 641-672. 

 Caspers. H. (1957)- Black Sea and Sea of Azov. In: Treatise on 



marine ecology and paleoecology. Geol. Soc. Amer. Mem. 67, 



vol. i, pp. 801-890. 

 Croghan, P. C. (1958). The osmotic and ionic regulation of Artemia 



salina (L.). /. exp. Biol. 35: 219-233. 

 Edney, E. B. (1954). Woodlice and the land habitat. Biol. Rev. 29: 



185-219. 

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poda in Britain. Verh. int. Ver. Limnol. 12: 620-628. 

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Mus. (Nat. Hist.) Zool. 3 : 3-57. 

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Kiemen bei der Osmoregulation von Carcinus maenas. Z. vergl. 



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