4.36 _ Bibliographical Notice. 
evident that Mithras paradoxus, together with its congeners M, 
flavidus and M. dubius, should occupy a place in the family 
Ciniflonide, immediately after the genus Veleda. 
The foregoing discovery necessitates a modification, as sub- 
joined, of the characteristics of the 
Genus Miruras. 
Eyes eight, unequal in size, and disposed on the sides and ante- 
rior part of the cephalothorax in two transverse, curved 
rows ; those of the posterior row, which is much the longer, 
and has its convexity directed forwards, are larger than 
those of the anterior row, the lateral eyes, which are seated 
on bold conical tubercles, being rather the largest; the 
eyes of the anterior row, whose convexity is directed up- 
wards, are situated above the prominent frontal margin; 
the two intermediate ones are placed near to each other on 
a minute tubercle, and the lateral ones are not very con- 
spicuous, being the smallest and lightest-coloured of the 
eight; the lateral eyes of both rows are separated by a wide 
interval. 
Mazille short, straight, powerful, and greatly enlarged at the 
extremity. 
Lip triangular or somewhat oval. 
Legs robust, of variable relative length in different species, each 
metatarsus of the posterior pair having a calamistrum on 
its superior surface. 
Spinners eight ; those of the inferior pair, which are the shortest, 
consist of a single joint each, and are united throughout — 
their entire length. 
BIBLIOGRAPHICAL NOTICE. 
An Elementary Text-book of the Microscope ; including a descrip- 
tion of the Methods of preparing and mounting Objects, §c. By 
J. W. Grirriry, M.D., F.L.S. 12mo. Van Voorst, London, 1864. 
NotwitHstanpi1ne the numerous books of various kinds which have 
been published as guides in the employment of the microscope, Dr. 
Griffith appears to us to have justly come to the conclusion that there 
was room for one more; and the mode of treatment which he has 
adopted in the little work now before us places it, in some respects 
at least, not only apart from, but in a superior position to most of 
its predecessors and competitors. It is, in fact, rather as an ele- 
mentary course of microscopic research than as a ‘ Text-book of the 
Microscope’ that we welcome its appearance, by far the greater 
portion of its pages being devoted to the description of the most 
characteristic objects for microscopic examination derived from the 
animal and vegetable kingdoms. By a judicious arrangement of 
aye 
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