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By Loren Eiseley

VERY-GOOD HARDBACK IN DUSTJACKET THAT used to be ideal yet backside 2 INCHES OF entrance received CRUMPLED UP AND TORN ON facets (MENDED yet nonetheless no longer nice LOOKING).

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This expediency seemed justified because of the close similarity in values of s calculated for a given trait among several samples, and because of the likelihood that s approaches a under these circumstances. another method of deriving the msd, but one not used in this rea more laborious, but stainvolves port, Still ways. One possibility is to determine the standard error of the mean for each character for each sample. Then for this char- it The proves it approaches the population standard deviation (a), and hence is applicable to a wider range of sample sizes.

While he may be correct in these determinations, been of interest to his fellow-specialists if it would have he had stated the basis of his determination of certain type localities, notably those of Richardson's species, described as from the " Rocky Mountains," or similarly 36 No. 41 1 only fair may be It " he has some " inside history to that the secret should be made public. localities. vague it is REVIEWS OF RECENT LITERATURE. -J hardly fair If said further, in the way fall 223 back upon, of gentle criticism, that it is wholly to ignore such knotty points as the allocation of a few names which he omits, since they form part of the literature of the subject, as, for example, Hypudiziis ochrogaster Wagner, Arvicola noveboracensis Richardson, and some of Rafinesque's names.

1960. An analysis of intraspecific variation in the kangaroo rat Dipodomys merriami. Univ. California Pubis. , 67:125-218. , and P. H. A. Sneath. 1959. The use of models in bacterial classification. Jour. Gen. , 20:284-290. Mearns, E. a. 1890. Description of supposed new species and subspecies of mammals, from Arizona. Bull. Amer. Mus. Natur. , 2:277-307. , and R. R. Sokal. 1957. A quantitative approach to a problem in classification. Evolution, 11:130-162. Pimentel, R. a. 1959. Mendelian infraspecific divergence levels and their analysis.

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