HuTTON. — On the Geographical Relations of the N.Z. Fauna. 249 



Arachnida. 

 Of Spiders we have about 100 species, but my knowledge of them is very 

 limited. Mr. Pickard-Cambridge, in a letter to me remarks, " all the spiders 

 you now send (from the Auckland province), except one or two, are strikingly 

 European in appearance, nothing tropical-looking among them." Perhaps the 

 most remarkable fact is the occurrence in the Chatham Islands of a species 

 of water-spider [Argyroneta) of which only one other species, inhabiting 

 Europe, is known. Spiders are very numerous in New Zealand, owing no 

 doubt to the abundance of Diptera, on which order they chiefly prey. 



Crustacea. 

 'Of Crustaceans 106 species have been described as coming from New 

 Zealand, but my knowledge of this class also is at present very limited. 

 Professor Dana has remarked that New Zealand has a greater resemblance 

 to Great Britain in its Crustacea than to any other part of the world ; but 

 our common salt-water crayfish {Palinurus lalandii) is found at the Cape of 

 Good Hope and the Island of St. Paul. 



Annelida. 

 Our marine Annelids have up to the present been almost entirely 

 neglected. Of terrestrial forms we have two species of earthworm {Lumbricus) 

 and a member of the peculiar genus Peripatus, found only in South America, 

 the Cape of Good Hope, and the West Indies. 



SCOLECIDA. 



The most remarkable fact in this class is the occurrence of two or three 

 species of land Planarians, the so-called " land-leeches," one or two of which 

 belong to the genus Bipalium, found only in India, China, and Japan. 



ECHINODERMATA. 



Of Echinoderms we have seventeen species of star-fish, eight sea-urchins, 

 and eight holothurians. Of these twelve star-fish, six sea-urchins and all the 

 holothurians appear to be endemic. Of the others Ophionereis fasciatus is found 

 at the Chatham Islands, Fentagonaster pulchellus at the Chatham Islands and 

 in China, Othilia luzonica in the Philippine Islands and Yera Cruz, while we 

 also possess species apparently identical with Astropecten armatus of South 

 America, and Henrida ocvlata of Europe. It is worthy of special remark 

 that although Australia possesses several species of Fentagonaster, the Chinese 

 species is not found there, so that it must have migrated to us direct, and not 

 have come vid Australia. We also possess a species of Fter aster, a genus 

 found only in South Africa and Northern Seas. Of the sea-urchins, Cidaris 

 tuharia, and Echinoh^issus recens are both found in Australia, but the latter 

 appears to be very rare in New Zealand, as I have only seen one specimen, 

 which is in the Colonial Museum. 



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