190 Rev. O. P. Cambridge on some The ascertained relative duration of the three periods above defined in the artiodactyle mammals most nearly approaching the Hippopotamus amphibvus in size, supports the conclusion here endeavoured to be drawn from what could be ascertained of these periods in the captive male in the Gardens of the Zoological Society of London, viz. that the duration of its life under these circumstances must be that, or nearly that, of the individuals of the species in their native land and wild state, which may accordingly be set down at or about 30 years. It is but due to the responsible officers in charge of the exotic animals in that noble establishment, to bear grateful testimony to their successful treatment, and to their exact ob-servations and records of phenomena essential, to the advance-ment of the science of Natural History. British Museum, July 20, 1879. XXIV. — On some new and rare British Spiders, with Cha-racters of a new Genus. By the Rev. O. P. Cambridge, M.A., C.M.Z.S., &c. [Plate XII.] Since my last communication on British Spiders (Ann. & Mag. Nat. Hist. Feb. 1878, ser. 5, vol. i. p. 105, pi. xi.) I have been enabled, through my own researches and the kind assistance of several friends and relatives, to add thirty-nine species to the list of those then known to Great Britain and Ireland. Fifteen out of the thirty-nine appear still to be undescribed ; twelve others have not hitherto been recorded as British, though known on the continent of Europe ; and the twelve remaining species have lately been described, either as new to science or to Britain, in Part I. of " The Spiders of Dorset," published in the ' Transactions of the Dorset Natural-History and Antiquarian Field Club ' for 1879. The fifteen new species, above referred to, are described in the follow-ing pages ; and several of them are figured in the accompanying Plate. A list is also appended of those spiders not before recorded as British, and of the others mentioned above as described and recorded in " The Spiders of Dorset." Several of the species included in the total (484) of British spiders recorded up to the time of the publication of my last communication (February 1878) have since been ascertained to be synonymous with others previously known. The num-ber now considered to be British, so far as they are known up



On some new and rare British spiders, with characters of a new genus

O P- Cambridge
Annals and Magazine of Natural History (5) 4: 190-215 (1879)

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